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tcp: doc : fix the syncookies default value

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syncookies is on for default since in commit e994b7c901
(tcp: Don't make syn cookies initial setting depend on CONFIG_SYSCTL).

And fix a typo of CONFIG_SYN_COOKIES.

Signed-off-by: Shan Wei <davidshan@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shan Wei
2013-06-21 15:18:32 +08:00
committed by David S. Miller
parent 4eb313a7a9
commit a3c910d2e7
1 changed files with 2 additions and 2 deletions
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4
Documentation/networking/ip-sysctl.txt
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@@ -420,10 +420,10 @@ tcp_synack_retries - INTEGER
for a passive TCP connection will happen after 63seconds. for a passive TCP connection will happen after 63seconds.
tcp_syncookies - BOOLEAN tcp_syncookies - BOOLEAN
Only valid when the kernel was compiled with CONFIG_SYNCOOKIES Only valid when the kernel was compiled with CONFIG_SYN_COOKIES
Send out syncookies when the syn backlog queue of a socket Send out syncookies when the syn backlog queue of a socket
overflows. This is to prevent against the common 'SYN flood attack' overflows. This is to prevent against the common 'SYN flood attack'
Default: FALSE Default: 1
Note, that syncookies is fallback facility. Note, that syncookies is fallback facility.
It MUST NOT be used to help highly loaded servers to stand It MUST NOT be used to help highly loaded servers to stand