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tcp.7: Update info on tcp_syn_retries default value 

See https://bugzilla.kernel.org/show_bug.cgi?id=202885.

Reported-by: vrafaeli@msn.com
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2020-05-04 10:21:57 +02:00
parent 0dd34252fd
commit 25da04997e
1 changed files with 8 additions and 2 deletions
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10
man7/tcp.7
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@ -811,12 +811,18 @@ the urgent pointer:
the urgent pointer points to the first byte after the urgent data.
Enabling this option may lead to interoperability problems.
.TP
.IR tcp_syn_retries " (integer; default: 5; since Linux 2.2)"
.IR tcp_syn_retries " (integer; default: 6; since Linux 2.2)"
.\" Since 2.1.38
The maximum number of times initial SYNs for an active TCP
connection attempt will be retransmitted.
This value should not be higher than 255.
The default value is 5, which corresponds to approximately 180 seconds.
The default value is 6, which corresponds to retrying for up to
approximately 127 seconds.
Before Linux 3.7,
.\" commit 6c9ff979d1921e9fd05d89e1383121c2503759b9
the default value was 5, which
(in conjunction with calculation based on other kernel parameters)
corresponded to approximately 180 seconds.
.TP
.IR tcp_synack_retries " (integer; default: 5; since Linux 2.2)"
.\" Since 2.1.38