netdev - Re: ports beeing reused too fast

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Message-Id: <200905121532.57477.opurdila@ixiacom.com>
Date:	Tue, 12 May 2009 15:32:57 +0300
From:	Octavian Purdila <opurdila@...acom.com>
To:	netdev@...r.kernel.org
Cc:	Stephen Hemminger <shemminger@...tta.com>,
	Bill Fink <billfink@...dspring.com>,
	Eric Dumazet <dada1@...mosbay.com>
Subject: Re: ports beeing reused too fast


> > > >> Any strong reason why a firewall would drop a SYN because ports were
> > > >> used in a previous session ?
> > > >
> > > > We don't know why the firewall (Cisco FWSM) is dropping the packets,
> > > > may be a bug, limitation or miss-configuration. We are trying to
> > > > track this down with the firewall vendor.
> > >

Interestingly, we are seeing the same behavior with another high-end firewall 
(Juniper SRX). 

As mentioned previously, this can not be caused by the TW state, because the 
connections are getting closed on the server side.

Thanks,
tavi

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