[CentOS] Weird TCP problem

Fri Sep 5 19:56:23 UTC 2008
Florin Andrei <florin at andrei.myip.org>

Gordon Messmer wrote:
> Florin Andrei wrote:
>> If you were running tcpdump in promiscuous mode, re-run the tests with 
>> it non-promiscuous. Just to make sure the SYN is actually received by 
>> that system.
> I ran the test again with "tcpdump -i eth0 -p" and then thinking better 
> of it, with "tcpdump -i any".  In both cases I was able to replicate the 
> problem.  Even with "-i any" I see the incoming SYN packets and no 
> SYN+ACK reply.

And you do capture *all* traffic, right? Don't filter out anything.

Florin Andrei