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Address PR feedback: remove outbound rate limit, improve config docs

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Remove rate limiting from StartHandshake (outbound) since DoS
protection only needs to limit inbound handshakes. This also avoids
returning nil from StartHandshake which historically always returned
non-nil. Update config comment to note openssl speed is single-core
and suggest scaling by routines.

Co-Authored-By: Claude <svc-devxp-claude@slack-corp.com>
This commit is contained in:
Jay Wren
2026-04-10 14:36:32 -04:00
parent 3df60ae195
commit 7794e93762
3 changed files with 12 additions and 37 deletions
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8
examples/config.yml
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@@ -342,12 +342,12 @@ logging:
# after receiving the response for lighthouse queries
#trigger_buffer: 64
# max_rate limits the number of new handshakes per second. Both incoming and outgoing new
# handshakes count against this limit. Once the limit is reached, new handshakes are dropped
# until the next second. A value of 0 means unlimited (default).
# max_rate limits the number of new inbound handshakes per second. Once the limit is reached,
# new handshakes are dropped until the next second. A value of 0 means unlimited (default).
# This is useful for preventing DoS attacks that attempt to exhaust CPU with handshake crypto.
# Running `openssl speed ecdhp256` on your hardware can be a good rule of thumb for choosing
# a max, as each handshake performs similar DH operations.
# a max, as each handshake performs similar DH operations. Note that this benchmarks a single
# core, so you may wish to scale the value by the number of `routines` configured.
#max_rate: 0
# Tunnel manager settings