Home abi bus cachefiles coda crypto csky debug dev fs kernel net s390 s390dbf sunrpc user vm xen xpc

ipv4.tcp_fastopen_key

file: /proc/sys/net/ipv4/tcp_fastopen_key
variable: net.ipv4.tcp_fastopen_key
Official reference

No official documentation available for this parameter.

man/info ubuntu man lkml redhat kb github google source

Last update: 2026-03-30 12:00:00 UTC
Parsed kernel version 6.18 from git

Sysctl Explorer is available under the GPL-2.0.
Kernel documentation © the Linux kernel authors.
Linux® is a registered trademark of Linus Torvalds.

Updated by Ilya Vasilyev aka Nadz Goldman from Arviol ( vStack dep. ), ITG