[Bug 217637] One TCP connection accepted TWO times

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Mar 17 10:06:13 UTC 2017


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217637

slw at zxy.spb.ru changed:

           What    |Removed                     |Added
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                 CC|                            |slw at zxy.spb.ru

--- Comment #24 from slw at zxy.spb.ru ---
(In reply to Michael Tuexen from comment #12)

> When the server gets this TCP ACK segment, it finds a listening socket and verifies that the segment is a valid SYN-cookie.

can you explain some more?
why SYN-cookie is valid for this ACK? I mean only first ACK to SYN-ACK can
valid, other ACK use different SEQ and must be invalid.

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