Date: Mon, 07 Apr 2008 19:17:29 -0400 From: Elliott Perrin <elliott@c7.ca> To: freebsd-pf@freebsd.org Subject: Re: SSH Session disconnecting with pf Message-ID: <1207610249.32218.143.camel@kensho.c7.ca> In-Reply-To: <20080407230750.GA15720@eos.sc1.parodius.com> References: <003801c898fb$16a897a0$43f9c6e0$@net> <20080407230750.GA15720@eos.sc1.parodius.com>
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See Below On Mon, 2008-04-07 at 16:07 -0700, Jeremy Chadwick wrote: > On Mon, Apr 07, 2008 at 11:02:33PM +0100, Torsten @ CNC-LONDON wrote: > > I'm running FreeBSD stable6.2 on all my servers and in the past one year I > > notices a random disconnection of persistent sessions to and from servers > > with is running as PF the firewall > > The big problem with your rules looks to be how you're determining SYN, > and how you're using keep state. > > Below are some comments. > > > SYN_ONLY="S/FSRA" > > This is very, very wrong, and probably the cause of your issues. This > should be S/SA. That is not very very wrong. Any TCP session starting up should only have the SYN flag set out of SYN FIN ACK RST. As a matter of fact this is in theory a more secure setting than S/SA (SYN out of SYN ACK). Cheers, Elliott Perrin elliott@c7.ca
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