Page MenuHomeDevCentral

Enable TCP Fast Open on FreeBSD for role dns
ClosedPublic

Authored by dereckson on Sep 3 2025, 19:01.
Tags
None
Referenced Files
F25168347: D3655.diff
Thu, Apr 2, 20:47
F25162411: D3655.diff
Thu, Apr 2, 11:32
Unknown Object (File)
Mon, Mar 30, 09:11
Unknown Object (File)
Mon, Mar 30, 02:31
Unknown Object (File)
Sun, Mar 29, 21:56
Unknown Object (File)
Sun, Mar 29, 10:20
Unknown Object (File)
Fri, Mar 27, 14:06
Unknown Object (File)
Wed, Mar 25, 17:07
Subscribers
None
Tokens
"Y So Serious" token, awarded by dereckson.

Details

Summary

While FreeBSD 14 kernel is built by default with support for
TCP Fast Open (option TCP_RFC7413), it's only enabled on boot
for clients, not for servers.

As Knot uses TCP Fast Open, we need to explicitly enable it.

Solves the following issue:

Sep  3 18:35:18 dns-001 knot[81075]: warning:
failed to enable TCP Fast Open on 178.32.70.109@53 (unknown system error)

References:

  • tcp(4)
Test Plan
  • sysctl logic tested on WindRiver

Diff Detail

Repository
rOPS Nasqueron Operations
Lint
Lint Not Applicable
Unit
Tests Not Applicable