[Bug 224730] ipfw dyn_keepalive sends a strange packet

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224730

Andrey V. Elsukov <ae at FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ae at FreeBSD.org

--- Comment #2 from Andrey V. Elsukov <ae at FreeBSD.org> ---
This packet is generated by ipfw(4) to cause remote host to send the reply,
that will extend lifetime of the STATE, created by keep-state rule. Since
stateful ipfw doesn't track TCP window, it doesn't set this field in the TCP
header. Also it doesn't set any TCP options.

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