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merge for start_catch_dns()

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garywill 2024-02-25 10:00:00 +08:00
parent 5f24246e85
commit 8759ee43f1
1 changed files with 13 additions and 5 deletions
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18
lnxrouter
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@ -1083,13 +1083,21 @@ allow_dns_port() {
start_catch_dns() {
local GATEWAY
local PROTs
echo
echo "iptables: redirect DNS queries to this host"
iptb 4 v nat I PREROUTING -i ${SUBNET_IFACE} ! -d ${GATEWAY4} -p udp -m udp --dport 53 -j REDIRECT --to-ports 53 || die
iptb 4 v nat I PREROUTING -i ${SUBNET_IFACE} ! -d ${GATEWAY4} -p tcp -m tcp --dport 53 -j REDIRECT --to-ports 53 || die
iptb 6 v nat I PREROUTING -i ${SUBNET_IFACE} ! -d ${GATEWAY6} -p udp -m udp --dport 53 -j REDIRECT --to-ports 53 || die
iptb 6 v nat I PREROUTING -i ${SUBNET_IFACE} ! -d ${GATEWAY6} -p tcp -m tcp --dport 53 -j REDIRECT --to-ports 53 || die
for iv in "${IP_VERs[@]}"; do
[[ "$iv" -eq "4" ]] && GATEWAY="$GATEWAY4"
[[ "$iv" -eq "6" ]] && GATEWAY="$GATEWAY6"
PROTs=("tcp" "udp")
for pt in "${PROTs[@]}"; do
iptb "$iv" v nat I PREROUTING -i "$SUBNET_IFACE" ! -d "$GATEWAY" -p "$pt" -m "$pt" --dport 53 -j REDIRECT --to-ports 53 || die
done
done
}