Fix e2e unsafe inbound test

CHANGELOG.md

@@ -7,85 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-## [1.10.0] - 2025-12-04
-
-See the [v1.10.0](https://github.com/slackhq/nebula/milestone/16?closed=1) milestone for a complete list of changes.
-
-### Added
-
-- Support for ipv6 and multiple ipv4/6 addresses in the overlay.
-  A new v2 ASN.1 based certificate format.
-  Certificates now have a unified interface for external implementations.
-  (#1212, #1216, #1345, #1359, #1381, #1419, #1464, #1466, #1451, #1476, #1467, #1481, #1399, #1488, #1492, #1495, #1468, #1521, #1535, #1538)
-- Add the ability to mark packets on linux to better target nebula packets in iptables/nftables. (#1331)
-- Add ECMP support for `unsafe_routes`. (#1332)
-- PKCS11 support for P256 keys when built with `pkcs11` tag (#1153, #1482)
-
 ### Changed
 
-- **NOTE**: `default_local_cidr_any` now defaults to false, meaning that any firewall rule
+- `default_local_cidr_any` now defaults to false, meaning that any firewall rule
   intended to target an `unsafe_routes` entry must explicitly declare it via the
   `local_cidr` field. This is almost always the intended behavior. This flag is
-  deprecated and will be removed in a future release. (#1373)
+  deprecated and will be removed in a future release.
-- Improve logging when a relay is in use on an inbound packet. (#1533)
-- Avoid fatal errors if `rountines` is > 1 on systems that don't support more than 1 routine. (#1531)
-- Log a warning if a firewall rule contains an `any` that negates a more restrictive filter. (#1513)
-- Accept encrypted CA passphrase from an environment variable. (#1421)
-- Allow handshaking with any trusted remote. (#1509)
-- Log only the count of blocklisted certificate fingerprints instead of the entire list. (#1525)
-- Don't fatal when the ssh server is unable to be configured successfully. (#1520)
-- Update to build against go v1.25. (#1483)
-- Allow projects using `nebula` as a library with userspace networking to configure the `logger` and build version. (#1239) 
-- Upgrade to `yaml.v3`. (#1148, #1371, #1438, #1478)
-
-### Fixed
-
-- Fix a potential bug with udp ipv4 only on darwin. (#1532)
-- Improve lost packet statistics. (#1441, #1537)
-- Honor `remote_allow_list` in hole punch response. (#1186)
-- Fix a panic when `tun.use_system_route_table` is `true` and a route lacks a destination. (#1437) 
-- Fix an issue when `tun.use_system_route_table: true` could result in heavy CPU utilization when many thousands of routes
-  are present. (#1326) 
-- Fix tests for 32 bit machines. (#1394)
-- Fix a possible 32bit integer underflow in config handling. (#1353)
-- Fix moving a udp address from one vpn address to another in the `static_host_map`
-  which could cause rapid re-handshaking with an incorrect remote. (#1259)
-- Improve smoke tests in environments where the docker network is not the default. (#1347)
-
-## [1.9.7] - 2025-10-10
-
-### Security
-
-- Fix an issue where Nebula could incorrectly accept and process a packet from an erroneous source IP when the sender's
-  certificate is configured with unsafe_routes (cert v1/v2) or multiple IPs (cert v2). (#1494)
-
-### Changed
-
-- Disable sending `recv_error` messages when a packet is received outside the allowable counter window. (#1459)
-- Improve error messages and remove some unnecessary fatal conditions in the Windows and generic udp listener. (#1453)
-
-## [1.9.6] - 2025-7-15
-
-### Added
-
-- Support dropping inactive tunnels. This is disabled by default in this release but can be enabled with `tunnels.drop_inactive`. See example config for more details. (#1413)
-
-### Fixed
-
-- Fix Darwin freeze due to presence of some Network Extensions (#1426)
-- Ensure the same relay tunnel is always used when multiple relay tunnels are present (#1422)
-- Fix Windows freeze due to ICMP error handling (#1412)
-- Fix relay migration panic (#1403)
-
-## [1.9.5] - 2024-12-05
-
-### Added
-
-- Gracefully ignore v2 certificates. (#1282)
-
-### Fixed
-
-- Fix relays that refuse to re-establish after one of the remote tunnel pairs breaks. (#1277)
 
 ## [1.9.4] - 2024-09-09
 
@@ -744,11 +671,7 @@ created.)
 
 - Initial public release.
 
-[Unreleased]: https://github.com/slackhq/nebula/compare/v1.10.0...HEAD
+[Unreleased]: https://github.com/slackhq/nebula/compare/v1.9.4...HEAD
-[1.10.0]: https://github.com/slackhq/nebula/releases/tag/v1.10.0
-[1.9.7]: https://github.com/slackhq/nebula/releases/tag/v1.9.7
-[1.9.6]: https://github.com/slackhq/nebula/releases/tag/v1.9.6
-[1.9.5]: https://github.com/slackhq/nebula/releases/tag/v1.9.5
 [1.9.4]: https://github.com/slackhq/nebula/releases/tag/v1.9.4
 [1.9.3]: https://github.com/slackhq/nebula/releases/tag/v1.9.3
 [1.9.2]: https://github.com/slackhq/nebula/releases/tag/v1.9.2

e2e/handshakes_test.go

@@ -25,12 +25,11 @@ import (
 
 func BenchmarkHotPath(b *testing.B) {
 	ca, _, caKey, _ := cert_test.NewTestCaCert(cert.Version1, cert.Curve_CURVE25519, time.Now(), time.Now().Add(10*time.Minute), nil, nil, []string{})
-	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(cert.Version1, ca, caKey, "me", "10.128.0.1/24", nil)
+	myControl, myVpnIpNet, _, _ := newSimpleServer(cert.Version1, ca, caKey, "me", "10.128.0.1/24", nil)
 	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(cert.Version1, ca, caKey, "them", "10.128.0.2/24", nil)
 
 	// Put their info in our lighthouse
 	myControl.InjectLightHouseAddr(theirVpnIpNet[0].Addr(), theirUdpAddr)
-	theirControl.InjectLightHouseAddr(myVpnIpNet[0].Addr(), myUdpAddr)
 
 	// Start the servers
 	myControl.Start()
@@ -39,9 +38,6 @@ func BenchmarkHotPath(b *testing.B) {
 	r := router.NewR(b, myControl, theirControl)
 	r.CancelFlowLogs()
 
-	assertTunnel(b, myVpnIpNet[0].Addr(), theirVpnIpNet[0].Addr(), myControl, theirControl, r)
-	b.ResetTimer()
-
 	for n := 0; n < b.N; n++ {
 		myControl.InjectTunUDPPacket(theirVpnIpNet[0].Addr(), 80, myVpnIpNet[0].Addr(), 80, []byte("Hi from me"))
 		_ = r.RouteForAllUntilTxTun(theirControl)
@@ -51,39 +47,6 @@ func BenchmarkHotPath(b *testing.B) {
 	theirControl.Stop()
 }
 
-func BenchmarkHotPathRelay(b *testing.B) {
-	ca, _, caKey, _ := cert_test.NewTestCaCert(cert.Version1, cert.Curve_CURVE25519, time.Now(), time.Now().Add(10*time.Minute), nil, nil, []string{})
-	myControl, myVpnIpNet, _, _ := newSimpleServer(cert.Version1, ca, caKey, "me     ", "10.128.0.1/24", m{"relay": m{"use_relays": true}})
-	relayControl, relayVpnIpNet, relayUdpAddr, _ := newSimpleServer(cert.Version1, ca, caKey, "relay  ", "10.128.0.128/24", m{"relay": m{"am_relay": true}})
-	theirControl, theirVpnIpNet, theirUdpAddr, _ := newSimpleServer(cert.Version1, ca, caKey, "them   ", "10.128.0.2/24", m{"relay": m{"use_relays": true}})
-
-	// Teach my how to get to the relay and that their can be reached via the relay
-	myControl.InjectLightHouseAddr(relayVpnIpNet[0].Addr(), relayUdpAddr)
-	myControl.InjectRelays(theirVpnIpNet[0].Addr(), []netip.Addr{relayVpnIpNet[0].Addr()})
-	relayControl.InjectLightHouseAddr(theirVpnIpNet[0].Addr(), theirUdpAddr)
-
-	// Build a router so we don't have to reason who gets which packet
-	r := router.NewR(b, myControl, relayControl, theirControl)
-	r.CancelFlowLogs()
-
-	// Start the servers
-	myControl.Start()
-	relayControl.Start()
-	theirControl.Start()
-
-	assertTunnel(b, theirVpnIpNet[0].Addr(), myVpnIpNet[0].Addr(), theirControl, myControl, r)
-	b.ResetTimer()
-
-	for n := 0; n < b.N; n++ {
-		myControl.InjectTunUDPPacket(theirVpnIpNet[0].Addr(), 80, myVpnIpNet[0].Addr(), 80, []byte("Hi from me"))
-		_ = r.RouteForAllUntilTxTun(theirControl)
-	}
-
-	myControl.Stop()
-	theirControl.Stop()
-	relayControl.Stop()
-}
-
 func TestGoodHandshake(t *testing.T) {
 	ca, _, caKey, _ := cert_test.NewTestCaCert(cert.Version1, cert.Curve_CURVE25519, time.Now(), time.Now().Add(10*time.Minute), nil, nil, []string{})
 	myControl, myVpnIpNet, myUdpAddr, _ := newSimpleServer(cert.Version1, ca, caKey, "me", "10.128.0.1/24", nil)
@@ -1378,6 +1341,13 @@ func TestGoodHandshakeUnsafeDest(t *testing.T) {
 		"tun": m{
 			"unsafe_routes": []m{route},
 		},
+		"firewall": m{
+			"unsafe_outbound": []m{{
+				"port":  "any",
+				"proto": "any",
+				"host":  "any",
+			}},
+		},
 	}
 	myControl, myVpnIpNet, myUdpAddr, myConfig := newSimpleServer(cert.Version2, ca, caKey, "me", "10.128.0.1/24", myCfg)
 	t.Logf("my config %v", myConfig)

e2e/helpers_test.go

@@ -85,8 +85,9 @@ func newSimpleServerWithUdpAndUnsafeNetworks(v cert.Version, caCrt cert.Certific
 	}}
 
 	var unsafeNetworks []netip.Prefix
+	var firewallUnsafeInbound []m
 	if sUnsafeNetworks != "" {
-		firewallInbound = []m{{
+		firewallUnsafeInbound = []m{{
 			"proto":      "any",
 			"port":       "any",
 			"host":       "any",
@@ -122,7 +123,8 @@ func newSimpleServerWithUdpAndUnsafeNetworks(v cert.Version, caCrt cert.Certific
 				"port":  "any",
 				"host":  "any",
 			}},
-			"inbound": firewallInbound,
+			"inbound":        firewallInbound,
+			"unsafe_inbound": firewallUnsafeInbound,
 		},
 		//"handshakes": m{
 		//	"try_interval": "1s",
@@ -292,7 +294,7 @@ func deadline(t *testing.T, seconds time.Duration) doneCb {
 	}
 }
 
-func assertTunnel(t testing.TB, vpnIpA, vpnIpB netip.Addr, controlA, controlB *nebula.Control, r *router.R) {
+func assertTunnel(t *testing.T, vpnIpA, vpnIpB netip.Addr, controlA, controlB *nebula.Control, r *router.R) {
 	// Send a packet from them to me
 	controlB.InjectTunUDPPacket(vpnIpA, 80, vpnIpB, 90, []byte("Hi from B"))
 	bPacket := r.RouteForAllUntilTxTun(controlA)
@@ -325,7 +327,7 @@ func assertHostInfoPair(t *testing.T, addrA, addrB netip.AddrPort, vpnNetsA, vpn
 	assert.Equal(t, hBinA.RemoteIndex, hAinB.LocalIndex, "Host B remote index does not match host A local index")
 }
 
-func assertUdpPacket(t testing.TB, expected, b []byte, fromIp, toIp netip.Addr, fromPort, toPort uint16) {
+func assertUdpPacket(t *testing.T, expected, b []byte, fromIp, toIp netip.Addr, fromPort, toPort uint16) {
 	if toIp.Is6() {
 		assertUdpPacket6(t, expected, b, fromIp, toIp, fromPort, toPort)
 	} else {
@@ -333,7 +335,7 @@ func assertUdpPacket(t testing.TB, expected, b []byte, fromIp, toIp netip.Addr,
 	}
 }
 
-func assertUdpPacket6(t testing.TB, expected, b []byte, fromIp, toIp netip.Addr, fromPort, toPort uint16) {
+func assertUdpPacket6(t *testing.T, expected, b []byte, fromIp, toIp netip.Addr, fromPort, toPort uint16) {
 	packet := gopacket.NewPacket(b, layers.LayerTypeIPv6, gopacket.Lazy)
 	v6 := packet.Layer(layers.LayerTypeIPv6).(*layers.IPv6)
 	assert.NotNil(t, v6, "No ipv6 data found")
@@ -352,7 +354,7 @@ func assertUdpPacket6(t testing.TB, expected, b []byte, fromIp, toIp netip.Addr,
 	assert.Equal(t, expected, data.Payload(), "Data was incorrect")
 }
 
-func assertUdpPacket4(t testing.TB, expected, b []byte, fromIp, toIp netip.Addr, fromPort, toPort uint16) {
+func assertUdpPacket4(t *testing.T, expected, b []byte, fromIp, toIp netip.Addr, fromPort, toPort uint16) {
 	packet := gopacket.NewPacket(b, layers.LayerTypeIPv4, gopacket.Lazy)
 	v4 := packet.Layer(layers.LayerTypeIPv4).(*layers.IPv4)
 	assert.NotNil(t, v4, "No ipv4 data found")

firewall.go

@@ -23,16 +23,15 @@ import (
 )
 
 type FirewallInterface interface {
-	AddRule(incoming bool, proto uint8, startPort int32, endPort int32, groups []string, host string, cidr, localCidr string, caName string, caSha string) error
+	AddRule(unsafe, incoming bool, proto uint8, startPort int32, endPort int32, groups []string, host string, cidr, localCidr string, caName string, caSha string) error
 }
 
 type conn struct {
 	Expires time.Time // Time when this conntrack entry will expire
 
-	// record why the original connection passed the firewall, so we can re-validate
+	// record why the original connection passed the firewall, so we can re-validate after ruleset changes.
-	// after ruleset changes. Note, rulesVersion is a uint16 so that these two
-	// fields pack for free after the uint32 above
 	incoming     bool
+	unsafe       bool
 	rulesVersion uint16
 }
 
@@ -40,8 +39,10 @@ type conn struct {
 type Firewall struct {
 	Conntrack *FirewallConntrack
 
-	InRules  *FirewallTable
+	InRules        *FirewallTable
-	OutRules *FirewallTable
+	OutRules       *FirewallTable
+	UnsafeInRules  *FirewallTable
+	UnsafeOutRules *FirewallTable
 
 	InSendReject  bool
 	OutSendReject bool
@@ -54,7 +55,7 @@ type Firewall struct {
 
 	// routableNetworks describes the vpn addresses as well as any unsafe networks issued to us in the certificate.
 	// The vpn addresses are a full bit match while the unsafe networks only match the prefix
-	routableNetworks *bart.Lite
+	routableNetworks *bart.Table[NetworkType]
 
 	// assignedNetworks is a list of vpn networks assigned to us in the certificate.
 	assignedNetworks  []netip.Prefix
@@ -149,17 +150,16 @@ func NewFirewall(l *logrus.Logger, tcpTimeout, UDPTimeout, defaultTimeout time.D
 		tmax = defaultTimeout
 	}
 
-	routableNetworks := new(bart.Lite)
+	routableNetworks := new(bart.Table[NetworkType])
 	var assignedNetworks []netip.Prefix
 	for _, network := range c.Networks() {
-		nprefix := netip.PrefixFrom(network.Addr(), network.Addr().BitLen())
+		routableNetworks.Insert(netip.PrefixFrom(network.Addr(), network.Addr().BitLen()), NetworkTypeVPN)
-		routableNetworks.Insert(nprefix)
 		assignedNetworks = append(assignedNetworks, network)
 	}
 
 	hasUnsafeNetworks := false
 	for _, n := range c.UnsafeNetworks() {
-		routableNetworks.Insert(n)
+		routableNetworks.Insert(n, NetworkTypeUnsafe)
 		hasUnsafeNetworks = true
 	}
 
@@ -170,6 +170,8 @@ func NewFirewall(l *logrus.Logger, tcpTimeout, UDPTimeout, defaultTimeout time.D
 		},
 		InRules:           newFirewallTable(),
 		OutRules:          newFirewallTable(),
+		UnsafeInRules:     newFirewallTable(),
+		UnsafeOutRules:    newFirewallTable(),
 		TCPTimeout:        tcpTimeout,
 		UDPTimeout:        UDPTimeout,
 		DefaultTimeout:    defaultTimeout,
@@ -212,6 +214,7 @@ func NewFirewallFromConfig(l *logrus.Logger, cs *CertState, c *config.C) (*Firew
 
 	fw.defaultLocalCIDRAny = c.GetBool("firewall.default_local_cidr_any", false)
 
+	//TODO: do we also need firewall.unsafe_inbound_action and firewall.unsafe_outbound_action?
 	inboundAction := c.GetString("firewall.inbound_action", "drop")
 	switch inboundAction {
 	case "reject":
@@ -234,12 +237,26 @@ func NewFirewallFromConfig(l *logrus.Logger, cs *CertState, c *config.C) (*Firew
 		fw.OutSendReject = false
 	}
 
-	err := AddFirewallRulesFromConfig(l, false, c, fw)
+	// outbound rules
+	err := AddFirewallRulesFromConfig(l, false, false, c, fw)
 	if err != nil {
 		return nil, err
 	}
 
-	err = AddFirewallRulesFromConfig(l, true, c, fw)
+	// unsafe outbound rules
+	err = AddFirewallRulesFromConfig(l, true, false, c, fw)
+	if err != nil {
+		return nil, err
+	}
+
+	// inbound rules
+	err = AddFirewallRulesFromConfig(l, false, true, c, fw)
+	if err != nil {
+		return nil, err
+	}
+
+	// unsafe inbound rules
+	err = AddFirewallRulesFromConfig(l, true, true, c, fw)
 	if err != nil {
 		return nil, err
 	}
@@ -248,11 +265,11 @@ func NewFirewallFromConfig(l *logrus.Logger, cs *CertState, c *config.C) (*Firew
 }
 
 // AddRule properly creates the in memory rule structure for a firewall table.
-func (f *Firewall) AddRule(incoming bool, proto uint8, startPort int32, endPort int32, groups []string, host string, cidr, localCidr, caName string, caSha string) error {
+func (f *Firewall) AddRule(unsafe, incoming bool, proto uint8, startPort int32, endPort int32, groups []string, host string, cidr, localCidr, caName string, caSha string) error {
 	// We need this rule string because we generate a hash. Removing this will break firewall reload.
 	ruleString := fmt.Sprintf(
-		"incoming: %v, proto: %v, startPort: %v, endPort: %v, groups: %v, host: %v, ip: %v, localIp: %v, caName: %v, caSha: %s",
+		"unsafe: %v, incoming: %v, proto: %v, startPort: %v, endPort: %v, groups: %v, host: %v, ip: %v, localIp: %v, caName: %v, caSha: %s",
-		incoming, proto, startPort, endPort, groups, host, cidr, localCidr, caName, caSha,
+		unsafe, incoming, proto, startPort, endPort, groups, host, cidr, localCidr, caName, caSha,
 	)
 	f.rules += ruleString + "\n"
 
@@ -260,8 +277,12 @@ func (f *Firewall) AddRule(incoming bool, proto uint8, startPort int32, endPort
 	if !incoming {
 		direction = "outgoing"
 	}
-	f.l.WithField("firewallRule", m{"direction": direction, "proto": proto, "startPort": startPort, "endPort": endPort, "groups": groups, "host": host, "cidr": cidr, "localCidr": localCidr, "caName": caName, "caSha": caSha}).
+
-		Info("Firewall rule added")
+	fields := m{"direction": direction, "proto": proto, "startPort": startPort, "endPort": endPort, "groups": groups, "host": host, "cidr": cidr, "localCidr": localCidr, "caName": caName, "caSha": caSha}
+	if unsafe {
+		fields["unsafe"] = true
+	}
+	f.l.WithField("firewallRule", fields).Info("Firewall rule added")
 
 	var (
 		ft *FirewallTable
@@ -269,9 +290,18 @@ func (f *Firewall) AddRule(incoming bool, proto uint8, startPort int32, endPort
 	)
 
 	if incoming {
-		ft = f.InRules
+		if unsafe {
+			ft = f.UnsafeInRules
+		} else {
+			ft = f.InRules
+		}
+
 	} else {
-		ft = f.OutRules
+		if unsafe {
+			ft = f.UnsafeOutRules
+		} else {
+			ft = f.OutRules
+		}
 	}
 
 	switch proto {
@@ -308,12 +338,21 @@ func (f *Firewall) GetRuleHashes() string {
 	return "SHA:" + f.GetRuleHash() + ",FNV:" + strconv.FormatUint(uint64(f.GetRuleHashFNV()), 10)
 }
 
-func AddFirewallRulesFromConfig(l *logrus.Logger, inbound bool, c *config.C, fw FirewallInterface) error {
+func AddFirewallRulesFromConfig(l *logrus.Logger, unsafe, inbound bool, c *config.C, fw FirewallInterface) error {
 	var table string
 	if inbound {
-		table = "firewall.inbound"
+		if unsafe {
+			table = "firewall.unsafe_inbound"
+		} else {
+			table = "firewall.inbound"
+		}
+
 	} else {
-		table = "firewall.outbound"
+		if unsafe {
+			table = "firewall.unsafe_outbound"
+		} else {
+			table = "firewall.outbound"
+		}
 	}
 
 	r := c.Get(table)
@@ -386,7 +425,7 @@ func AddFirewallRulesFromConfig(l *logrus.Logger, inbound bool, c *config.C, fw
 			l.Warnf("%s rule #%v; %s", table, i, warning)
 		}
 
-		err = fw.AddRule(inbound, proto, startPort, endPort, r.Groups, r.Host, r.Cidr, r.LocalCidr, r.CAName, r.CASha)
+		err = fw.AddRule(unsafe, inbound, proto, startPort, endPort, r.Groups, r.Host, r.Cidr, r.LocalCidr, r.CAName, r.CASha)
 		if err != nil {
 			return fmt.Errorf("%s rule #%v; `%s`", table, i, err)
 		}
@@ -409,6 +448,9 @@ func (f *Firewall) Drop(fp firewall.Packet, incoming bool, h *HostInfo, caPool *
 		return nil
 	}
 
+	var remoteNetworkType NetworkType
+	var ok bool
+
 	// Make sure remote address matches nebula certificate, and determine how to treat it
 	if h.networks == nil {
 		// Simple case: Certificate has one address and no unsafe networks
@@ -416,13 +458,14 @@ func (f *Firewall) Drop(fp firewall.Packet, incoming bool, h *HostInfo, caPool *
 			f.metrics(incoming).droppedRemoteAddr.Inc(1)
 			return ErrInvalidRemoteIP
 		}
+		remoteNetworkType = NetworkTypeVPN
 	} else {
-		nwType, ok := h.networks.Lookup(fp.RemoteAddr)
+		remoteNetworkType, ok = h.networks.Lookup(fp.RemoteAddr)
 		if !ok {
 			f.metrics(incoming).droppedRemoteAddr.Inc(1)
 			return ErrInvalidRemoteIP
 		}
-		switch nwType {
+		switch remoteNetworkType {
 		case NetworkTypeVPN:
 			break // nothing special
 		case NetworkTypeVPNPeer:
@@ -437,14 +480,27 @@ func (f *Firewall) Drop(fp firewall.Packet, incoming bool, h *HostInfo, caPool *
 	}
 
 	// Make sure we are supposed to be handling this local ip address
-	if !f.routableNetworks.Contains(fp.LocalAddr) {
+	localNetworkType, ok := f.routableNetworks.Lookup(fp.LocalAddr)
+	if !ok {
 		f.metrics(incoming).droppedLocalAddr.Inc(1)
 		return ErrInvalidLocalIP
 	}
 
-	table := f.OutRules
+	useUnsafe := remoteNetworkType == NetworkTypeUnsafe || localNetworkType == NetworkTypeUnsafe
+
+	var table *FirewallTable
 	if incoming {
-		table = f.InRules
+		if useUnsafe {
+			table = f.UnsafeInRules
+		} else {
+			table = f.InRules
+		}
+	} else {
+		if useUnsafe {
+			table = f.UnsafeOutRules
+		} else {
+			table = f.OutRules
+		}
 	}
 
 	// We now know which firewall table to check against
@@ -454,12 +510,13 @@ func (f *Firewall) Drop(fp firewall.Packet, incoming bool, h *HostInfo, caPool *
 	}
 
 	// We always want to conntrack since it is a faster operation
-	f.addConn(fp, incoming)
+	f.addConn(fp, useUnsafe, incoming)
 
 	return nil
 }
 
 func (f *Firewall) metrics(incoming bool) firewallMetrics {
+	//TODO: need unsafe metrics too
 	if incoming {
 		return f.incomingMetrics
 	} else {
@@ -499,7 +556,6 @@ func (f *Firewall) inConns(fp firewall.Packet, h *HostInfo, caPool *cert.CAPool,
 	}
 
 	c, ok := conntrack.Conns[fp]
-
 	if !ok {
 		conntrack.Unlock()
 		return false
@@ -508,9 +564,19 @@ func (f *Firewall) inConns(fp firewall.Packet, h *HostInfo, caPool *cert.CAPool,
 	if c.rulesVersion != f.rulesVersion {
 		// This conntrack entry was for an older rule set, validate
 		// it still passes with the current rule set
-		table := f.OutRules
+		var table *FirewallTable
 		if c.incoming {
-			table = f.InRules
+			if c.unsafe {
+				table = f.UnsafeInRules
+			} else {
+				table = f.InRules
+			}
+		} else {
+			if c.unsafe {
+				table = f.UnsafeOutRules
+			} else {
+				table = f.OutRules
+			}
 		}
 
 		// We now know which firewall table to check against
@@ -519,6 +585,7 @@ func (f *Firewall) inConns(fp firewall.Packet, h *HostInfo, caPool *cert.CAPool,
 				h.logger(f.l).
 					WithField("fwPacket", fp).
 					WithField("incoming", c.incoming).
+					WithField("unsafe", c.unsafe).
 					WithField("rulesVersion", f.rulesVersion).
 					WithField("oldRulesVersion", c.rulesVersion).
 					Debugln("dropping old conntrack entry, does not match new ruleset")
@@ -532,6 +599,7 @@ func (f *Firewall) inConns(fp firewall.Packet, h *HostInfo, caPool *cert.CAPool,
 			h.logger(f.l).
 				WithField("fwPacket", fp).
 				WithField("incoming", c.incoming).
+				WithField("unsafe", c.unsafe).
 				WithField("rulesVersion", f.rulesVersion).
 				WithField("oldRulesVersion", c.rulesVersion).
 				Debugln("keeping old conntrack entry, does match new ruleset")
@@ -558,7 +626,7 @@ func (f *Firewall) inConns(fp firewall.Packet, h *HostInfo, caPool *cert.CAPool,
 	return true
 }
 
-func (f *Firewall) addConn(fp firewall.Packet, incoming bool) {
+func (f *Firewall) addConn(fp firewall.Packet, unsafe, incoming bool) {
 	var timeout time.Duration
 	c := &conn{}
 
@@ -581,6 +649,7 @@ func (f *Firewall) addConn(fp firewall.Packet, incoming bool) {
 	// Record which rulesVersion allowed this connection, so we can retest after
 	// firewall reload
 	c.incoming = incoming
+	c.unsafe = unsafe
 	c.rulesVersion = f.rulesVersion
 	c.Expires = time.Now().Add(timeout)
 	conntrack.Conns[fp] = c
@@ -937,6 +1006,7 @@ func convertRule(l *logrus.Logger, p any, table string, i int) (rule, error) {
 	r.Code = toString("code", m)
 	r.Proto = toString("proto", m)
 	r.Host = toString("host", m)
+	//TODO: create an alias to remote_cidr and deprecate cidr?
 	r.Cidr = toString("cidr", m)
 	r.LocalCidr = toString("local_cidr", m)
 	r.CAName = toString("ca_name", m)

firewall_test.go

@@ -73,65 +73,65 @@ func TestFirewall_AddRule(t *testing.T) {
 	ti6, err := netip.ParsePrefix("fd12::34/128")
 	require.NoError(t, err)
 
-	require.NoError(t, fw.AddRule(true, firewall.ProtoTCP, 1, 1, []string{}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoTCP, 1, 1, []string{}, "", "", "", "", ""))
 	// An empty rule is any
 	assert.True(t, fw.InRules.TCP[1].Any.Any.Any)
 	assert.Empty(t, fw.InRules.TCP[1].Any.Groups)
 	assert.Empty(t, fw.InRules.TCP[1].Any.Hosts)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", "", "", "", ""))
 	assert.Nil(t, fw.InRules.UDP[1].Any.Any)
 	assert.Contains(t, fw.InRules.UDP[1].Any.Groups[0].Groups, "g1")
 	assert.Empty(t, fw.InRules.UDP[1].Any.Hosts)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoICMP, 1, 1, []string{}, "h1", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoICMP, 1, 1, []string{}, "h1", "", "", "", ""))
 	assert.Nil(t, fw.InRules.ICMP[1].Any.Any)
 	assert.Empty(t, fw.InRules.ICMP[1].Any.Groups)
 	assert.Contains(t, fw.InRules.ICMP[1].Any.Hosts, "h1")
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 1, 1, []string{}, "", ti.String(), "", "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 1, 1, []string{}, "", ti.String(), "", "", ""))
 	assert.Nil(t, fw.OutRules.AnyProto[1].Any.Any)
 	_, ok := fw.OutRules.AnyProto[1].Any.CIDR.Get(ti)
 	assert.True(t, ok)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 1, 1, []string{}, "", ti6.String(), "", "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 1, 1, []string{}, "", ti6.String(), "", "", ""))
 	assert.Nil(t, fw.OutRules.AnyProto[1].Any.Any)
 	_, ok = fw.OutRules.AnyProto[1].Any.CIDR.Get(ti6)
 	assert.True(t, ok)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 1, 1, []string{}, "", "", ti.String(), "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 1, 1, []string{}, "", "", ti.String(), "", ""))
 	assert.NotNil(t, fw.OutRules.AnyProto[1].Any.Any)
 	ok = fw.OutRules.AnyProto[1].Any.Any.LocalCIDR.Get(ti)
 	assert.True(t, ok)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 1, 1, []string{}, "", "", ti6.String(), "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 1, 1, []string{}, "", "", ti6.String(), "", ""))
 	assert.NotNil(t, fw.OutRules.AnyProto[1].Any.Any)
 	ok = fw.OutRules.AnyProto[1].Any.Any.LocalCIDR.Get(ti6)
 	assert.True(t, ok)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", "", "", "ca-name", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", "", "", "ca-name", ""))
 	assert.Contains(t, fw.InRules.UDP[1].CANames, "ca-name")
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", "", "", "", "ca-sha"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoUDP, 1, 1, []string{"g1"}, "", "", "", "", "ca-sha"))
 	assert.Contains(t, fw.InRules.UDP[1].CAShas, "ca-sha")
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "any", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 0, 0, []string{}, "any", "", "", "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any.Any)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	anyIp, err := netip.ParsePrefix("0.0.0.0/0")
 	require.NoError(t, err)
 
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "", anyIp.String(), "", "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 0, 0, []string{}, "", anyIp.String(), "", "", ""))
 	assert.Nil(t, fw.OutRules.AnyProto[0].Any.Any)
 	table, ok := fw.OutRules.AnyProto[0].Any.CIDR.Lookup(netip.MustParseAddr("1.1.1.1"))
 	assert.True(t, table.Any)
@@ -142,7 +142,7 @@ func TestFirewall_AddRule(t *testing.T) {
 	anyIp6, err := netip.ParsePrefix("::/0")
 	require.NoError(t, err)
 
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "", anyIp6.String(), "", "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 0, 0, []string{}, "", anyIp6.String(), "", "", ""))
 	assert.Nil(t, fw.OutRules.AnyProto[0].Any.Any)
 	table, ok = fw.OutRules.AnyProto[0].Any.CIDR.Lookup(netip.MustParseAddr("9::9"))
 	assert.True(t, table.Any)
@@ -150,29 +150,29 @@ func TestFirewall_AddRule(t *testing.T) {
 	assert.False(t, ok)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "", "any", "", "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 0, 0, []string{}, "", "any", "", "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any.Any)
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "", "", anyIp.String(), "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 0, 0, []string{}, "", "", anyIp.String(), "", ""))
 	assert.False(t, fw.OutRules.AnyProto[0].Any.Any.Any)
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any.LocalCIDR.Lookup(netip.MustParseAddr("1.1.1.1")))
 	assert.False(t, fw.OutRules.AnyProto[0].Any.Any.LocalCIDR.Lookup(netip.MustParseAddr("9::9")))
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "", "", anyIp6.String(), "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 0, 0, []string{}, "", "", anyIp6.String(), "", ""))
 	assert.False(t, fw.OutRules.AnyProto[0].Any.Any.Any)
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any.LocalCIDR.Lookup(netip.MustParseAddr("9::9")))
 	assert.False(t, fw.OutRules.AnyProto[0].Any.Any.LocalCIDR.Lookup(netip.MustParseAddr("1.1.1.1")))
 
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.NoError(t, fw.AddRule(false, firewall.ProtoAny, 0, 0, []string{}, "", "", "any", "", ""))
+	require.NoError(t, fw.AddRule(false, false, firewall.ProtoAny, 0, 0, []string{}, "", "", "any", "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any.Any)
 
 	// Test error conditions
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
-	require.Error(t, fw.AddRule(true, math.MaxUint8, 0, 0, []string{}, "", "", "", "", ""))
+	require.Error(t, fw.AddRule(false, true, math.MaxUint8, 0, 0, []string{}, "", "", "", "", ""))
-	require.Error(t, fw.AddRule(true, firewall.ProtoAny, 10, 0, []string{}, "", "", "", "", ""))
+	require.Error(t, fw.AddRule(false, true, firewall.ProtoAny, 10, 0, []string{}, "", "", "", "", ""))
 }
 
 func TestFirewall_Drop(t *testing.T) {
@@ -208,7 +208,7 @@ func TestFirewall_Drop(t *testing.T) {
 	h.buildNetworks(myVpnNetworksTable, &c)
 
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
 	cp := cert.NewCAPool()
 
 	// Drop outbound
@@ -227,28 +227,28 @@ func TestFirewall_Drop(t *testing.T) {
 
 	// ensure signer doesn't get in the way of group checks
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum"))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum-bad"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum-bad"))
 	assert.Equal(t, fw.Drop(p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caSha doesn't drop on match
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum-bad"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum-bad"))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum"))
 	require.NoError(t, fw.Drop(p, true, &h, cp, nil))
 
 	// ensure ca name doesn't get in the way of group checks
 	cp.CAs["signer-shasum"] = &cert.CachedCertificate{Certificate: &dummyCert{name: "ca-good"}}
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good", ""))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good-bad", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good-bad", ""))
 	assert.Equal(t, fw.Drop(p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caName doesn't drop on match
 	cp.CAs["signer-shasum"] = &cert.CachedCertificate{Certificate: &dummyCert{name: "ca-good"}}
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good-bad", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good-bad", ""))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good", ""))
 	require.NoError(t, fw.Drop(p, true, &h, cp, nil))
 }
 
@@ -287,7 +287,7 @@ func TestFirewall_DropV6(t *testing.T) {
 	h.buildNetworks(myVpnNetworksTable, &c)
 
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
 	cp := cert.NewCAPool()
 
 	// Drop outbound
@@ -306,28 +306,28 @@ func TestFirewall_DropV6(t *testing.T) {
 
 	// ensure signer doesn't get in the way of group checks
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum"))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum-bad"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum-bad"))
 	assert.Equal(t, fw.Drop(p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caSha doesn't drop on match
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum-bad"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "", "signer-shasum-bad"))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "", "signer-shasum"))
 	require.NoError(t, fw.Drop(p, true, &h, cp, nil))
 
 	// ensure ca name doesn't get in the way of group checks
 	cp.CAs["signer-shasum"] = &cert.CachedCertificate{Certificate: &dummyCert{name: "ca-good"}}
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good", ""))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good-bad", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good-bad", ""))
 	assert.Equal(t, fw.Drop(p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caName doesn't drop on match
 	cp.CAs["signer-shasum"] = &cert.CachedCertificate{Certificate: &dummyCert{name: "ca-good"}}
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good-bad", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"nope"}, "", "", "", "ca-good-bad", ""))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group"}, "", "", "", "ca-good", ""))
 	require.NoError(t, fw.Drop(p, true, &h, cp, nil))
 }
 
@@ -532,7 +532,7 @@ func TestFirewall_Drop2(t *testing.T) {
 	h1.buildNetworks(myVpnNetworksTable, c1.Certificate)
 
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"default-group", "test-group"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"default-group", "test-group"}, "", "", "", "", ""))
 	cp := cert.NewCAPool()
 
 	// h1/c1 lacks the proper groups
@@ -612,8 +612,8 @@ func TestFirewall_Drop3(t *testing.T) {
 	h3.buildNetworks(myVpnNetworksTable, c3.Certificate)
 
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 1, 1, []string{}, "host1", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 1, 1, []string{}, "host1", "", "", "", ""))
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 1, 1, []string{}, "", "", "", "", "signer-sha"))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 1, 1, []string{}, "", "", "", "", "signer-sha"))
 	cp := cert.NewCAPool()
 
 	// c1 should pass because host match
@@ -627,7 +627,7 @@ func TestFirewall_Drop3(t *testing.T) {
 
 	// Test a remote address match
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 1, 1, []string{}, "", "1.2.3.4/24", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 1, 1, []string{}, "", "1.2.3.4/24", "", "", ""))
 	require.NoError(t, fw.Drop(p, true, &h1, cp, nil))
 }
 
@@ -665,7 +665,7 @@ func TestFirewall_Drop3V6(t *testing.T) {
 	// Test a remote address match
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
 	cp := cert.NewCAPool()
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 1, 1, []string{}, "", "fd12::34/120", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 1, 1, []string{}, "", "fd12::34/120", "", "", ""))
 	require.NoError(t, fw.Drop(p, true, &h, cp, nil))
 }
 
@@ -704,7 +704,7 @@ func TestFirewall_DropConntrackReload(t *testing.T) {
 	h.buildNetworks(myVpnNetworksTable, c.Certificate)
 
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
 	cp := cert.NewCAPool()
 
 	// Drop outbound
@@ -717,7 +717,7 @@ func TestFirewall_DropConntrackReload(t *testing.T) {
 
 	oldFw := fw
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 10, 10, []string{"any"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 10, 10, []string{"any"}, "", "", "", "", ""))
 	fw.Conntrack = oldFw.Conntrack
 	fw.rulesVersion = oldFw.rulesVersion + 1
 
@@ -726,7 +726,7 @@ func TestFirewall_DropConntrackReload(t *testing.T) {
 
 	oldFw = fw
 	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 11, 11, []string{"any"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 11, 11, []string{"any"}, "", "", "", "", ""))
 	fw.Conntrack = oldFw.Conntrack
 	fw.rulesVersion = oldFw.rulesVersion + 1
 
@@ -765,7 +765,7 @@ func TestFirewall_DropIPSpoofing(t *testing.T) {
 
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c.Certificate)
 
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 1, 1, []string{}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 1, 1, []string{}, "", "", "", "", ""))
 	cp := cert.NewCAPool()
 
 	// Packet spoofed by `c1`. Note that the remote addr is not a valid one.
@@ -958,28 +958,28 @@ func TestAddFirewallRulesFromConfig(t *testing.T) {
 	conf := config.NewC(l)
 	mf := &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"outbound": []any{map[string]any{"port": "1", "proto": "tcp", "host": "a"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, false, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, false, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: false, proto: firewall.ProtoTCP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: "", localIp: ""}, mf.lastCall)
 
 	// Test adding udp rule
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"outbound": []any{map[string]any{"port": "1", "proto": "udp", "host": "a"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, false, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, false, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: false, proto: firewall.ProtoUDP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: "", localIp: ""}, mf.lastCall)
 
 	// Test adding icmp rule
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"outbound": []any{map[string]any{"port": "1", "proto": "icmp", "host": "a"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, false, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, false, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: false, proto: firewall.ProtoICMP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: "", localIp: ""}, mf.lastCall)
 
 	// Test adding any rule
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "host": "a"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, host: "a", ip: "", localIp: ""}, mf.lastCall)
 
 	// Test adding rule with cidr
@@ -987,14 +987,14 @@ func TestAddFirewallRulesFromConfig(t *testing.T) {
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "cidr": cidr.String()}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: cidr.String(), localIp: ""}, mf.lastCall)
 
 	// Test adding rule with local_cidr
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "local_cidr": cidr.String()}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: "", localIp: cidr.String()}, mf.lastCall)
 
 	// Test adding rule with cidr ipv6
@@ -1002,75 +1002,75 @@ func TestAddFirewallRulesFromConfig(t *testing.T) {
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "cidr": cidr6.String()}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: cidr6.String(), localIp: ""}, mf.lastCall)
 
 	// Test adding rule with any cidr
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "cidr": "any"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: "any", localIp: ""}, mf.lastCall)
 
 	// Test adding rule with junk cidr
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "cidr": "junk/junk"}}}
-	require.EqualError(t, AddFirewallRulesFromConfig(l, true, conf, mf), "firewall.inbound rule #0; cidr did not parse; netip.ParsePrefix(\"junk/junk\"): ParseAddr(\"junk\"): unable to parse IP")
+	require.EqualError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf), "firewall.inbound rule #0; cidr did not parse; netip.ParsePrefix(\"junk/junk\"): ParseAddr(\"junk\"): unable to parse IP")
 
 	// Test adding rule with local_cidr ipv6
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "local_cidr": cidr6.String()}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: "", localIp: cidr6.String()}, mf.lastCall)
 
 	// Test adding rule with any local_cidr
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "local_cidr": "any"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, localIp: "any"}, mf.lastCall)
 
 	// Test adding rule with junk local_cidr
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "local_cidr": "junk/junk"}}}
-	require.EqualError(t, AddFirewallRulesFromConfig(l, true, conf, mf), "firewall.inbound rule #0; local_cidr did not parse; netip.ParsePrefix(\"junk/junk\"): ParseAddr(\"junk\"): unable to parse IP")
+	require.EqualError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf), "firewall.inbound rule #0; local_cidr did not parse; netip.ParsePrefix(\"junk/junk\"): ParseAddr(\"junk\"): unable to parse IP")
 
 	// Test adding rule with ca_sha
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "ca_sha": "12312313123"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: "", localIp: "", caSha: "12312313123"}, mf.lastCall)
 
 	// Test adding rule with ca_name
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "ca_name": "root01"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: nil, ip: "", localIp: "", caName: "root01"}, mf.lastCall)
 
 	// Test single group
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "group": "a"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: "", localIp: ""}, mf.lastCall)
 
 	// Test single groups
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "groups": "a"}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: "", localIp: ""}, mf.lastCall)
 
 	// Test multiple AND groups
 	conf = config.NewC(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "groups": []string{"a", "b"}}}}
-	require.NoError(t, AddFirewallRulesFromConfig(l, true, conf, mf))
+	require.NoError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: firewall.ProtoAny, startPort: 1, endPort: 1, groups: []string{"a", "b"}, ip: "", localIp: ""}, mf.lastCall)
 
 	// Test Add error
@@ -1078,7 +1078,7 @@ func TestAddFirewallRulesFromConfig(t *testing.T) {
 	mf = &mockFirewall{}
 	mf.nextCallReturn = errors.New("test error")
 	conf.Settings["firewall"] = map[string]any{"inbound": []any{map[string]any{"port": "1", "proto": "any", "host": "a"}}}
-	require.EqualError(t, AddFirewallRulesFromConfig(l, true, conf, mf), "firewall.inbound rule #0; `test error`")
+	require.EqualError(t, AddFirewallRulesFromConfig(l, false, true, conf, mf), "firewall.inbound rule #0; `test error`")
 }
 
 func TestFirewall_convertRule(t *testing.T) {
@@ -1251,7 +1251,7 @@ func newSetupFromCert(t *testing.T, l *logrus.Logger, c dummyCert) testsetup {
 		myVpnNetworksTable.Insert(prefix)
 	}
 	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
-	require.NoError(t, fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
+	require.NoError(t, fw.AddRule(false, true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", "", "", ""))
 
 	return testsetup{
 		c:                  c,
@@ -1332,13 +1332,14 @@ func TestFirewall_Drop_EnforceIPMatch(t *testing.T) {
 		tc.p.LocalAddr = netip.MustParseAddr("192.168.0.3")
 		tc.err = ErrNoMatchingRule
 		tc.Test(t, unsafeSetup.fw) //should hit firewall and bounce off
-		require.NoError(t, unsafeSetup.fw.AddRule(true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", unsafePrefix.String(), "", ""))
+		require.NoError(t, unsafeSetup.fw.AddRule(true, true, firewall.ProtoAny, 0, 0, []string{"any"}, "", "", unsafePrefix.String(), "", ""))
 		tc.err = nil
 		tc.Test(t, unsafeSetup.fw) //should pass
 	})
 }
 
 type addRuleCall struct {
+	unsafe    bool
 	incoming  bool
 	proto     uint8
 	startPort int32
@@ -1356,8 +1357,9 @@ type mockFirewall struct {
 	nextCallReturn error
 }
 
-func (mf *mockFirewall) AddRule(incoming bool, proto uint8, startPort int32, endPort int32, groups []string, host string, ip, localIp, caName string, caSha string) error {
+func (mf *mockFirewall) AddRule(unsafe, incoming bool, proto uint8, startPort int32, endPort int32, groups []string, host string, ip, localIp, caName string, caSha string) error {
 	mf.lastCall = addRuleCall{
+		unsafe:    unsafe,
 		incoming:  incoming,
 		proto:     proto,
 		startPort: startPort,

handshake_ix.go

@@ -99,11 +99,11 @@ func ixHandshakeStage0(f *Interface, hh *HandshakeHostInfo) bool {
 	return true
 }
 
-func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H) {
+func ixHandshakeStage1(f *Interface, addr netip.AddrPort, via *ViaSender, packet []byte, h *header.H) {
 	cs := f.pki.getCertState()
 	crt := cs.GetDefaultCertificate()
 	if crt == nil {
-		f.l.WithField("from", via).
+		f.l.WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 0, "style": "ix_psk0"}).
 			WithField("certVersion", cs.initiatingVersion).
 			Error("Unable to handshake with host because no certificate is available")
@@ -112,7 +112,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 
 	ci, err := NewConnectionState(f.l, cs, crt, false, noise.HandshakeIX)
 	if err != nil {
-		f.l.WithError(err).WithField("from", via).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 			Error("Failed to create connection state")
 		return
@@ -123,7 +123,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 
 	msg, _, _, err := ci.H.ReadMessage(nil, packet[header.Len:])
 	if err != nil {
-		f.l.WithError(err).WithField("from", via).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 			Error("Failed to call noise.ReadMessage")
 		return
@@ -132,7 +132,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 	hs := &NebulaHandshake{}
 	err = hs.Unmarshal(msg)
 	if err != nil || hs.Details == nil {
-		f.l.WithError(err).WithField("from", via).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 			Error("Failed unmarshal handshake message")
 		return
@@ -140,7 +140,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 
 	rc, err := cert.Recombine(cert.Version(hs.Details.CertVersion), hs.Details.Cert, ci.H.PeerStatic(), ci.Curve())
 	if err != nil {
-		f.l.WithError(err).WithField("from", via).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 			Info("Handshake did not contain a certificate")
 		return
@@ -153,7 +153,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 			fp = "<error generating certificate fingerprint>"
 		}
 
-		e := f.l.WithError(err).WithField("from", via).
+		e := f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 			WithField("certVpnNetworks", rc.Networks()).
 			WithField("certFingerprint", fp)
@@ -172,7 +172,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 		if myCertOtherVersion == nil {
 			if f.l.Level >= logrus.DebugLevel {
 				f.l.WithError(err).WithFields(m{
-					"from":      via,
+					"udpAddr":   addr,
 					"handshake": m{"stage": 1, "style": "ix_psk0"},
 					"cert":      remoteCert,
 				}).Debug("Might be unable to handshake with host due to missing certificate version")
@@ -184,7 +184,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 	}
 
 	if len(remoteCert.Certificate.Networks()) == 0 {
-		f.l.WithError(err).WithField("from", via).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("cert", remoteCert).
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
 			Info("No networks in certificate")
@@ -201,7 +201,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 	vpnAddrs := make([]netip.Addr, len(vpnNetworks))
 	for i, network := range vpnNetworks {
 		if f.myVpnAddrsTable.Contains(network.Addr()) {
-			f.l.WithField("vpnNetworks", vpnNetworks).WithField("from", via).
+			f.l.WithField("vpnNetworks", vpnNetworks).WithField("udpAddr", addr).
 				WithField("certName", certName).
 				WithField("certVersion", certVersion).
 				WithField("fingerprint", fingerprint).
@@ -215,18 +215,18 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 		}
 	}
 
-	if !via.IsRelayed {
+	if addr.IsValid() {
+		// addr can be invalid when the tunnel is being relayed.
 		// We only want to apply the remote allow list for direct tunnels here
-		if !f.lightHouse.GetRemoteAllowList().AllowAll(vpnAddrs, via.UdpAddr.Addr()) {
+		if !f.lightHouse.GetRemoteAllowList().AllowAll(vpnAddrs, addr.Addr()) {
-			f.l.WithField("vpnAddrs", vpnAddrs).WithField("from", via).
+			f.l.WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
-				Debug("lighthouse.remote_allow_list denied incoming handshake")
 			return
 		}
 	}
 
 	myIndex, err := generateIndex(f.l)
 	if err != nil {
-		f.l.WithError(err).WithField("vpnAddrs", vpnAddrs).WithField("from", via).
+		f.l.WithError(err).WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).
 			WithField("certName", certName).
 			WithField("certVersion", certVersion).
 			WithField("fingerprint", fingerprint).
@@ -251,7 +251,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 
 	msgRxL := f.l.WithFields(m{
 		"vpnAddrs":       vpnAddrs,
-		"from":           via,
+		"udpAddr":        addr,
 		"certName":       certName,
 		"certVersion":    certVersion,
 		"fingerprint":    fingerprint,
@@ -283,7 +283,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 
 	hsBytes, err := hs.Marshal()
 	if err != nil {
-		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("from", via).
+		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("udpAddr", addr).
 			WithField("certName", certName).
 			WithField("certVersion", certVersion).
 			WithField("fingerprint", fingerprint).
@@ -295,7 +295,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 	nh := header.Encode(make([]byte, header.Len), header.Version, header.Handshake, header.HandshakeIXPSK0, hs.Details.InitiatorIndex, 2)
 	msg, dKey, eKey, err := ci.H.WriteMessage(nh, hsBytes)
 	if err != nil {
-		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("from", via).
+		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("udpAddr", addr).
 			WithField("certName", certName).
 			WithField("certVersion", certVersion).
 			WithField("fingerprint", fingerprint).
@@ -303,7 +303,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to call noise.WriteMessage")
 		return
 	} else if dKey == nil || eKey == nil {
-		f.l.WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("from", via).
+		f.l.WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("udpAddr", addr).
 			WithField("certName", certName).
 			WithField("certVersion", certVersion).
 			WithField("fingerprint", fingerprint).
@@ -329,9 +329,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 	ci.eKey = NewNebulaCipherState(eKey)
 
 	hostinfo.remotes = f.lightHouse.QueryCache(vpnAddrs)
-	if !via.IsRelayed {
+	hostinfo.SetRemote(addr)
-		hostinfo.SetRemote(via.UdpAddr)
-	}
 	hostinfo.buildNetworks(f.myVpnNetworksTable, remoteCert.Certificate)
 
 	existing, err := f.handshakeManager.CheckAndComplete(hostinfo, 0, f)
@@ -339,7 +337,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 		switch err {
 		case ErrAlreadySeen:
 			// Update remote if preferred
-			if existing.SetRemoteIfPreferred(f.hostMap, via) {
+			if existing.SetRemoteIfPreferred(f.hostMap, addr) {
 				// Send a test packet to ensure the other side has also switched to
 				// the preferred remote
 				f.SendMessageToVpnAddr(header.Test, header.TestRequest, vpnAddrs[0], []byte(""), make([]byte, 12, 12), make([]byte, mtu))
@@ -347,21 +345,21 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 
 			msg = existing.HandshakePacket[2]
 			f.messageMetrics.Tx(header.Handshake, header.MessageSubType(msg[1]), 1)
-			if !via.IsRelayed {
+			if addr.IsValid() {
-				err := f.outside.WriteTo(msg, via.UdpAddr)
+				err := f.outside.WriteTo(msg, addr)
 				if err != nil {
-					f.l.WithField("vpnAddrs", existing.vpnAddrs).WithField("from", via).
+					f.l.WithField("vpnAddrs", existing.vpnAddrs).WithField("udpAddr", addr).
 						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
 						WithError(err).Error("Failed to send handshake message")
 				} else {
-					f.l.WithField("vpnAddrs", existing.vpnAddrs).WithField("from", via).
+					f.l.WithField("vpnAddrs", existing.vpnAddrs).WithField("udpAddr", addr).
 						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
 						Info("Handshake message sent")
 				}
 				return
 			} else {
-				if via.relay == nil {
+				if via == nil {
-					f.l.Error("Handshake send failed: both addr and via.relay are nil.")
+					f.l.Error("Handshake send failed: both addr and via are nil.")
 					return
 				}
 				hostinfo.relayState.InsertRelayTo(via.relayHI.vpnAddrs[0])
@@ -373,7 +371,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 			}
 		case ErrExistingHostInfo:
 			// This means there was an existing tunnel and this handshake was older than the one we are currently based on
-			f.l.WithField("vpnAddrs", vpnAddrs).WithField("from", via).
+			f.l.WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).
 				WithField("certName", certName).
 				WithField("certVersion", certVersion).
 				WithField("oldHandshakeTime", existing.lastHandshakeTime).
@@ -389,7 +387,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 			return
 		case ErrLocalIndexCollision:
 			// This means we failed to insert because of collision on localIndexId. Just let the next handshake packet retry
-			f.l.WithField("vpnAddrs", vpnAddrs).WithField("from", via).
+			f.l.WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).
 				WithField("certName", certName).
 				WithField("certVersion", certVersion).
 				WithField("fingerprint", fingerprint).
@@ -402,7 +400,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 		default:
 			// Shouldn't happen, but just in case someone adds a new error type to CheckAndComplete
 			// And we forget to update it here
-			f.l.WithError(err).WithField("vpnAddrs", vpnAddrs).WithField("from", via).
+			f.l.WithError(err).WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).
 				WithField("certName", certName).
 				WithField("certVersion", certVersion).
 				WithField("fingerprint", fingerprint).
@@ -416,23 +414,30 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 
 	// Do the send
 	f.messageMetrics.Tx(header.Handshake, header.MessageSubType(msg[1]), 1)
-	if !via.IsRelayed {
+	if addr.IsValid() {
-		err = f.outside.WriteTo(msg, via.UdpAddr)
+		err = f.outside.WriteTo(msg, addr)
-		log := f.l.WithField("vpnAddrs", vpnAddrs).WithField("from", via).
-			WithField("certName", certName).
-			WithField("certVersion", certVersion).
-			WithField("fingerprint", fingerprint).
-			WithField("issuer", issuer).
-			WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
-			WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"})
 		if err != nil {
-			log.WithError(err).Error("Failed to send handshake")
+			f.l.WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("certVersion", certVersion).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+				WithError(err).Error("Failed to send handshake")
 		} else {
-			log.Info("Handshake message sent")
+			f.l.WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("certVersion", certVersion).
+				WithField("fingerprint", fingerprint).
+				WithField("issuer", issuer).
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+				Info("Handshake message sent")
 		}
 	} else {
-		if via.relay == nil {
+		if via == nil {
-			f.l.Error("Handshake send failed: both addr and via.relay are nil.")
+			f.l.Error("Handshake send failed: both addr and via are nil.")
 			return
 		}
 		hostinfo.relayState.InsertRelayTo(via.relayHI.vpnAddrs[0])
@@ -457,7 +462,7 @@ func ixHandshakeStage1(f *Interface, via ViaSender, packet []byte, h *header.H)
 	return
 }
 
-func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packet []byte, h *header.H) bool {
+func ixHandshakeStage2(f *Interface, addr netip.AddrPort, via *ViaSender, hh *HandshakeHostInfo, packet []byte, h *header.H) bool {
 	if hh == nil {
 		// Nothing here to tear down, got a bogus stage 2 packet
 		return true
@@ -467,10 +472,10 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 	defer hh.Unlock()
 
 	hostinfo := hh.hostinfo
-	if !via.IsRelayed {
+	if addr.IsValid() {
 		// The vpnAddr we know about is the one we tried to handshake with, use it to apply the remote allow list.
-		if !f.lightHouse.GetRemoteAllowList().AllowAll(hostinfo.vpnAddrs, via.UdpAddr.Addr()) {
+		if !f.lightHouse.GetRemoteAllowList().AllowAll(hostinfo.vpnAddrs, addr.Addr()) {
-			f.l.WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("from", via).Debug("lighthouse.remote_allow_list denied incoming handshake")
+			f.l.WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
 			return false
 		}
 	}
@@ -478,7 +483,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 	ci := hostinfo.ConnectionState
 	msg, eKey, dKey, err := ci.H.ReadMessage(nil, packet[header.Len:])
 	if err != nil {
-		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("from", via).
+		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("header", h).
 			Error("Failed to call noise.ReadMessage")
 
@@ -487,7 +492,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 		// near future
 		return false
 	} else if dKey == nil || eKey == nil {
-		f.l.WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("from", via).
+		f.l.WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 			Error("Noise did not arrive at a key")
 
@@ -499,7 +504,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 	hs := &NebulaHandshake{}
 	err = hs.Unmarshal(msg)
 	if err != nil || hs.Details == nil {
-		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("from", via).
+		f.l.WithError(err).WithField("vpnAddrs", hostinfo.vpnAddrs).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).Error("Failed unmarshal handshake message")
 
 		// The handshake state machine is complete, if things break now there is no chance to recover. Tear down and start again
@@ -508,7 +513,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 
 	rc, err := cert.Recombine(cert.Version(hs.Details.CertVersion), hs.Details.Cert, ci.H.PeerStatic(), ci.Curve())
 	if err != nil {
-		f.l.WithError(err).WithField("from", via).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("vpnAddrs", hostinfo.vpnAddrs).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 			Info("Handshake did not contain a certificate")
@@ -522,7 +527,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 			fp = "<error generating certificate fingerprint>"
 		}
 
-		e := f.l.WithError(err).WithField("from", via).
+		e := f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("vpnAddrs", hostinfo.vpnAddrs).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 			WithField("certFingerprint", fp).
@@ -537,7 +542,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 	}
 
 	if len(remoteCert.Certificate.Networks()) == 0 {
-		f.l.WithError(err).WithField("from", via).
+		f.l.WithError(err).WithField("udpAddr", addr).
 			WithField("vpnAddrs", hostinfo.vpnAddrs).
 			WithField("cert", remoteCert).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
@@ -560,8 +565,8 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 	ci.eKey = NewNebulaCipherState(eKey)
 
 	// Make sure the current udpAddr being used is set for responding
-	if !via.IsRelayed {
+	if addr.IsValid() {
-		hostinfo.SetRemote(via.UdpAddr)
+		hostinfo.SetRemote(addr)
 	} else {
 		hostinfo.relayState.InsertRelayTo(via.relayHI.vpnAddrs[0])
 	}
@@ -583,7 +588,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 	// Ensure the right host responded
 	if !correctHostResponded {
 		f.l.WithField("intendedVpnAddrs", hostinfo.vpnAddrs).WithField("haveVpnNetworks", vpnNetworks).
-			WithField("from", via).
+			WithField("udpAddr", addr).
 			WithField("certName", certName).
 			WithField("certVersion", certVersion).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
@@ -597,7 +602,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 		f.handshakeManager.StartHandshake(hostinfo.vpnAddrs[0], func(newHH *HandshakeHostInfo) {
 			// Block the current used address
 			newHH.hostinfo.remotes = hostinfo.remotes
-			newHH.hostinfo.remotes.BlockRemote(via)
+			newHH.hostinfo.remotes.BlockRemote(addr)
 
 			f.l.WithField("blockedUdpAddrs", newHH.hostinfo.remotes.CopyBlockedRemotes()).
 				WithField("vpnNetworks", vpnNetworks).
@@ -620,7 +625,7 @@ func ixHandshakeStage2(f *Interface, via ViaSender, hh *HandshakeHostInfo, packe
 	ci.window.Update(f.l, 2)
 
 	duration := time.Since(hh.startTime).Nanoseconds()
-	msgRxL := f.l.WithField("vpnAddrs", vpnAddrs).WithField("from", via).
+	msgRxL := f.l.WithField("vpnAddrs", vpnAddrs).WithField("udpAddr", addr).
 		WithField("certName", certName).
 		WithField("certVersion", certVersion).
 		WithField("fingerprint", fingerprint).

handshake_manager.go

@@ -136,11 +136,11 @@ func (hm *HandshakeManager) Run(ctx context.Context) {
 	}
 }
 
-func (hm *HandshakeManager) HandleIncoming(via ViaSender, packet []byte, h *header.H) {
+func (hm *HandshakeManager) HandleIncoming(addr netip.AddrPort, via *ViaSender, packet []byte, h *header.H) {
 	// First remote allow list check before we know the vpnIp
-	if !via.IsRelayed {
+	if addr.IsValid() {
-		if !hm.lightHouse.GetRemoteAllowList().AllowUnknownVpnAddr(via.UdpAddr.Addr()) {
+		if !hm.lightHouse.GetRemoteAllowList().AllowUnknownVpnAddr(addr.Addr()) {
-			hm.l.WithField("from", via).Debug("lighthouse.remote_allow_list denied incoming handshake")
+			hm.l.WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
 			return
 		}
 	}
@@ -149,11 +149,11 @@ func (hm *HandshakeManager) HandleIncoming(via ViaSender, packet []byte, h *head
 	case header.HandshakeIXPSK0:
 		switch h.MessageCounter {
 		case 1:
-			ixHandshakeStage1(hm.f, via, packet, h)
+			ixHandshakeStage1(hm.f, addr, via, packet, h)
 
 		case 2:
 			newHostinfo := hm.queryIndex(h.RemoteIndex)
-			tearDown := ixHandshakeStage2(hm.f, via, newHostinfo, packet, h)
+			tearDown := ixHandshakeStage2(hm.f, addr, via, newHostinfo, packet, h)
 			if tearDown && newHostinfo != nil {
 				hm.DeleteHostInfo(newHostinfo.hostinfo)
 			}

hostmap.go

@@ -1,9 +1,7 @@
 package nebula
 
 import (
-	"encoding/json"
 	"errors"
-	"fmt"
 	"net"
 	"net/netip"
 	"slices"
@@ -278,25 +276,9 @@ type HostInfo struct {
 }
 
 type ViaSender struct {
-	UdpAddr   netip.AddrPort
 	relayHI   *HostInfo // relayHI is the host info object of the relay
 	remoteIdx uint32    // remoteIdx is the index included in the header of the received packet
 	relay     *Relay    // relay contains the rest of the relay information, including the PeerIP of the host trying to communicate with us.
-	IsRelayed bool      // IsRelayed is true if the packet was sent through a relay
-}
-
-func (v ViaSender) String() string {
-	if v.IsRelayed {
-		return fmt.Sprintf("%s (relayed)", v.UdpAddr)
-	}
-	return v.UdpAddr.String()
-}
-
-func (v ViaSender) MarshalJSON() ([]byte, error) {
-	if v.IsRelayed {
-		return json.Marshal(m{"relay": v.UdpAddr})
-	}
-	return json.Marshal(m{"direct": v.UdpAddr})
 }
 
 type cachedPacket struct {
@@ -712,7 +694,6 @@ func (i *HostInfo) GetCert() *cert.CachedCertificate {
 	return nil
 }
 
-// TODO: Maybe use ViaSender here?
 func (i *HostInfo) SetRemote(remote netip.AddrPort) {
 	// We copy here because we likely got this remote from a source that reuses the object
 	if i.remote != remote {
@@ -723,14 +704,14 @@ func (i *HostInfo) SetRemote(remote netip.AddrPort) {
 
 // SetRemoteIfPreferred returns true if the remote was changed. The lastRoam
 // time on the HostInfo will also be updated.
-func (i *HostInfo) SetRemoteIfPreferred(hm *HostMap, via ViaSender) bool {
+func (i *HostInfo) SetRemoteIfPreferred(hm *HostMap, newRemote netip.AddrPort) bool {
-	if via.IsRelayed {
+	if !newRemote.IsValid() {
+		// relays have nil udp Addrs
 		return false
 	}
-
 	currentRemote := i.remote
 	if !currentRemote.IsValid() {
-		i.SetRemote(via.UdpAddr)
+		i.SetRemote(newRemote)
 		return true
 	}
 
@@ -743,7 +724,7 @@ func (i *HostInfo) SetRemoteIfPreferred(hm *HostMap, via ViaSender) bool {
 			return false
 		}
 
-		if l.Contains(via.UdpAddr.Addr()) {
+		if l.Contains(newRemote.Addr()) {
 			newIsPreferred = true
 		}
 	}
@@ -753,7 +734,7 @@ func (i *HostInfo) SetRemoteIfPreferred(hm *HostMap, via ViaSender) bool {
 		i.lastRoam = time.Now()
 		i.lastRoamRemote = currentRemote
 
-		i.SetRemote(via.UdpAddr)
+		i.SetRemote(newRemote)
 
 		return true
 	}

interface.go

@@ -279,7 +279,7 @@ func (f *Interface) listenOut(i int) {
 	nb := make([]byte, 12, 12)
 
 	li.ListenOut(func(fromUdpAddr netip.AddrPort, payload []byte) {
-		f.readOutsidePackets(ViaSender{UdpAddr: fromUdpAddr}, plaintext[:0], payload, h, fwPacket, lhh, nb, i, ctCache.Get(f.l))
+		f.readOutsidePackets(fromUdpAddr, nil, plaintext[:0], payload, h, fwPacket, lhh, nb, i, ctCache.Get(f.l))
 	})
 }
 

outside.go

@@ -19,21 +19,21 @@ const (
 	minFwPacketLen = 4
 )
 
-func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte, h *header.H, fwPacket *firewall.Packet, lhf *LightHouseHandler, nb []byte, q int, localCache firewall.ConntrackCache) {
+func (f *Interface) readOutsidePackets(ip netip.AddrPort, via *ViaSender, out []byte, packet []byte, h *header.H, fwPacket *firewall.Packet, lhf *LightHouseHandler, nb []byte, q int, localCache firewall.ConntrackCache) {
 	err := h.Parse(packet)
 	if err != nil {
 		// Hole punch packets are 0 or 1 byte big, so lets ignore printing those errors
 		if len(packet) > 1 {
-			f.l.WithField("packet", packet).Infof("Error while parsing inbound packet from %s: %s", via, err)
+			f.l.WithField("packet", packet).Infof("Error while parsing inbound packet from %s: %s", ip, err)
 		}
 		return
 	}
 
 	//l.Error("in packet ", header, packet[HeaderLen:])
-	if !via.IsRelayed {
+	if ip.IsValid() {
-		if f.myVpnNetworksTable.Contains(via.UdpAddr.Addr()) {
+		if f.myVpnNetworksTable.Contains(ip.Addr()) {
 			if f.l.Level >= logrus.DebugLevel {
-				f.l.WithField("from", via).Debug("Refusing to process double encrypted packet")
+				f.l.WithField("udpAddr", ip).Debug("Refusing to process double encrypted packet")
 			}
 			return
 		}
@@ -54,7 +54,8 @@ func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte,
 
 	switch h.Type {
 	case header.Message:
-		if !f.handleEncrypted(ci, via, h) {
+		// TODO handleEncrypted sends directly to addr on error. Handle this in the tunneling case.
+		if !f.handleEncrypted(ci, ip, h) {
 			return
 		}
 
@@ -78,7 +79,7 @@ func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte,
 			// Successfully validated the thing. Get rid of the Relay header.
 			signedPayload = signedPayload[header.Len:]
 			// Pull the Roaming parts up here, and return in all call paths.
-			f.handleHostRoaming(hostinfo, via)
+			f.handleHostRoaming(hostinfo, ip)
 			// Track usage of both the HostInfo and the Relay for the received & authenticated packet
 			f.connectionManager.In(hostinfo)
 			f.connectionManager.RelayUsed(h.RemoteIndex)
@@ -95,14 +96,7 @@ func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte,
 			case TerminalType:
 				// If I am the target of this relay, process the unwrapped packet
 				// From this recursive point, all these variables are 'burned'. We shouldn't rely on them again.
-				via = ViaSender{
+				f.readOutsidePackets(netip.AddrPort{}, &ViaSender{relayHI: hostinfo, remoteIdx: relay.RemoteIndex, relay: relay}, out[:0], signedPayload, h, fwPacket, lhf, nb, q, localCache)
-					UdpAddr:   via.UdpAddr,
-					relayHI:   hostinfo,
-					remoteIdx: relay.RemoteIndex,
-					relay:     relay,
-					IsRelayed: true,
-				}
-				f.readOutsidePackets(via, out[:0], signedPayload, h, fwPacket, lhf, nb, q, localCache)
 				return
 			case ForwardingType:
 				// Find the target HostInfo relay object
@@ -132,32 +126,31 @@ func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte,
 
 	case header.LightHouse:
 		f.messageMetrics.Rx(h.Type, h.Subtype, 1)
-		if !f.handleEncrypted(ci, via, h) {
+		if !f.handleEncrypted(ci, ip, h) {
 			return
 		}
 
 		d, err := f.decrypt(hostinfo, h.MessageCounter, out, packet, h, nb)
 		if err != nil {
-			hostinfo.logger(f.l).WithError(err).WithField("from", via).
+			hostinfo.logger(f.l).WithError(err).WithField("udpAddr", ip).
 				WithField("packet", packet).
 				Error("Failed to decrypt lighthouse packet")
 			return
 		}
 
-		//TODO: assert via is not relayed
+		lhf.HandleRequest(ip, hostinfo.vpnAddrs, d, f)
-		lhf.HandleRequest(via.UdpAddr, hostinfo.vpnAddrs, d, f)
 
 		// Fallthrough to the bottom to record incoming traffic
 
 	case header.Test:
 		f.messageMetrics.Rx(h.Type, h.Subtype, 1)
-		if !f.handleEncrypted(ci, via, h) {
+		if !f.handleEncrypted(ci, ip, h) {
 			return
 		}
 
 		d, err := f.decrypt(hostinfo, h.MessageCounter, out, packet, h, nb)
 		if err != nil {
-			hostinfo.logger(f.l).WithError(err).WithField("from", via).
+			hostinfo.logger(f.l).WithError(err).WithField("udpAddr", ip).
 				WithField("packet", packet).
 				Error("Failed to decrypt test packet")
 			return
@@ -166,7 +159,7 @@ func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte,
 		if h.Subtype == header.TestRequest {
 			// This testRequest might be from TryPromoteBest, so we should roam
 			// to the new IP address before responding
-			f.handleHostRoaming(hostinfo, via)
+			f.handleHostRoaming(hostinfo, ip)
 			f.send(header.Test, header.TestReply, ci, hostinfo, d, nb, out)
 		}
 
@@ -177,34 +170,34 @@ func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte,
 
 	case header.Handshake:
 		f.messageMetrics.Rx(h.Type, h.Subtype, 1)
-		f.handshakeManager.HandleIncoming(via, packet, h)
+		f.handshakeManager.HandleIncoming(ip, via, packet, h)
 		return
 
 	case header.RecvError:
 		f.messageMetrics.Rx(h.Type, h.Subtype, 1)
-		f.handleRecvError(via.UdpAddr, h)
+		f.handleRecvError(ip, h)
 		return
 
 	case header.CloseTunnel:
 		f.messageMetrics.Rx(h.Type, h.Subtype, 1)
-		if !f.handleEncrypted(ci, via, h) {
+		if !f.handleEncrypted(ci, ip, h) {
 			return
 		}
 
-		hostinfo.logger(f.l).WithField("from", via).
+		hostinfo.logger(f.l).WithField("udpAddr", ip).
 			Info("Close tunnel received, tearing down.")
 
 		f.closeTunnel(hostinfo)
 		return
 
 	case header.Control:
-		if !f.handleEncrypted(ci, via, h) {
+		if !f.handleEncrypted(ci, ip, h) {
 			return
 		}
 
 		d, err := f.decrypt(hostinfo, h.MessageCounter, out, packet, h, nb)
 		if err != nil {
-			hostinfo.logger(f.l).WithError(err).WithField("from", via).
+			hostinfo.logger(f.l).WithError(err).WithField("udpAddr", ip).
 				WithField("packet", packet).
 				Error("Failed to decrypt Control packet")
 			return
@@ -214,11 +207,11 @@ func (f *Interface) readOutsidePackets(via ViaSender, out []byte, packet []byte,
 
 	default:
 		f.messageMetrics.Rx(h.Type, h.Subtype, 1)
-		hostinfo.logger(f.l).Debugf("Unexpected packet received from %s", via)
+		hostinfo.logger(f.l).Debugf("Unexpected packet received from %s", ip)
 		return
 	}
 
-	f.handleHostRoaming(hostinfo, via)
+	f.handleHostRoaming(hostinfo, ip)
 
 	f.connectionManager.In(hostinfo)
 }
@@ -237,36 +230,36 @@ func (f *Interface) sendCloseTunnel(h *HostInfo) {
 	f.send(header.CloseTunnel, 0, h.ConnectionState, h, []byte{}, make([]byte, 12, 12), make([]byte, mtu))
 }
 
-func (f *Interface) handleHostRoaming(hostinfo *HostInfo, via ViaSender) {
+func (f *Interface) handleHostRoaming(hostinfo *HostInfo, udpAddr netip.AddrPort) {
-	if !via.IsRelayed && hostinfo.remote != via.UdpAddr {
+	if udpAddr.IsValid() && hostinfo.remote != udpAddr {
-		if !f.lightHouse.GetRemoteAllowList().AllowAll(hostinfo.vpnAddrs, via.UdpAddr.Addr()) {
+		if !f.lightHouse.GetRemoteAllowList().AllowAll(hostinfo.vpnAddrs, udpAddr.Addr()) {
-			hostinfo.logger(f.l).WithField("newAddr", via.UdpAddr).Debug("lighthouse.remote_allow_list denied roaming")
+			hostinfo.logger(f.l).WithField("newAddr", udpAddr).Debug("lighthouse.remote_allow_list denied roaming")
 			return
 		}
 
-		if !hostinfo.lastRoam.IsZero() && via.UdpAddr == hostinfo.lastRoamRemote && time.Since(hostinfo.lastRoam) < RoamingSuppressSeconds*time.Second {
+		if !hostinfo.lastRoam.IsZero() && udpAddr == hostinfo.lastRoamRemote && time.Since(hostinfo.lastRoam) < RoamingSuppressSeconds*time.Second {
 			if f.l.Level >= logrus.DebugLevel {
-				hostinfo.logger(f.l).WithField("udpAddr", hostinfo.remote).WithField("newAddr", via.UdpAddr).
+				hostinfo.logger(f.l).WithField("udpAddr", hostinfo.remote).WithField("newAddr", udpAddr).
 					Debugf("Suppressing roam back to previous remote for %d seconds", RoamingSuppressSeconds)
 			}
 			return
 		}
 
-		hostinfo.logger(f.l).WithField("udpAddr", hostinfo.remote).WithField("newAddr", via.UdpAddr).
+		hostinfo.logger(f.l).WithField("udpAddr", hostinfo.remote).WithField("newAddr", udpAddr).
 			Info("Host roamed to new udp ip/port.")
 		hostinfo.lastRoam = time.Now()
 		hostinfo.lastRoamRemote = hostinfo.remote
-		hostinfo.SetRemote(via.UdpAddr)
+		hostinfo.SetRemote(udpAddr)
 	}
 
 }
 
 // handleEncrypted returns true if a packet should be processed, false otherwise
-func (f *Interface) handleEncrypted(ci *ConnectionState, via ViaSender, h *header.H) bool {
+func (f *Interface) handleEncrypted(ci *ConnectionState, addr netip.AddrPort, h *header.H) bool {
 	// If connectionstate does not exist, send a recv error, if possible, to encourage a fast reconnect
 	if ci == nil {
-		if !via.IsRelayed {
+		if addr.IsValid() {
-			f.maybeSendRecvError(via.UdpAddr, h.RemoteIndex)
+			f.maybeSendRecvError(addr, h.RemoteIndex)
 		}
 		return false
 	}

remote_list.go

@@ -338,21 +338,21 @@ func (r *RemoteList) CopyCache() *CacheMap {
 }
 
 // BlockRemote locks and records the address as bad, it will be excluded from the deduplicated address list
-func (r *RemoteList) BlockRemote(bad ViaSender) {
+func (r *RemoteList) BlockRemote(bad netip.AddrPort) {
-	if bad.IsRelayed {
+	if !bad.IsValid() {
+		// relays can have nil udp Addrs
 		return
 	}
-
 	r.Lock()
 	defer r.Unlock()
 
 	// Check if we already blocked this addr
-	if r.unlockedIsBad(bad.UdpAddr) {
+	if r.unlockedIsBad(bad) {
 		return
 	}
 
 	// We copy here because we are taking something else's memory and we can't trust everything
-	r.badRemotes = append(r.badRemotes, bad.UdpAddr)
+	r.badRemotes = append(r.badRemotes, bad)
 
 	// Mark the next interaction must recollect/dedupe
 	r.shouldRebuild = true