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From kernel doc:
tcp_rfc1337 - BOOLEAN If set, the TCP stack behaves conforming to RFC1337. If unset, we are not conforming to RFC, but prevent TCP TIME_WAIT assassination. Default: 0
- With setting
0the system would 'assassinate' a socket in time_wait prematurely upon receiving a RST. While this might sound like a good idea (it frees up a socket quicker), it opens the door for tcp sequence problems/syn replay. Those problems were described in RFC1337 and enabling the setting
1is one way to deal with them (letting TIME_WAIT packets idle out even if a reset is received, so that the sequence number cannot be reused meanwhile). The wiki is correct in my view.
Kernel doc is wrong here - "prevent" should read "enable".--Indigo (talk) 21:12, 17 September 2013 (UTC)