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Subject: [Bug 217637] One TCP connection accepted TWO times
Date: Fri, 17 Mar 2017 10:06:13 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D217637

slw@zxy.spb.ru changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |slw@zxy.spb.ru

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

> When the server gets this TCP ACK segment, it finds a listening socket an=
d 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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