Date: Thu, 26 Jul 2007 23:21:58 +0300 From: Jordan Gordeev <jgordeev@dir.bg> To: freebsd-pf@freebsd.org Cc: freebsd-questions@freebsd.org Subject: Re: pf and keep/modulate state on 6.2 Message-ID: <46A90266.5050204@dir.bg> In-Reply-To: <200707252055.50780.max@love2party.net> References: <200702252202.l1PM2r46003312@cheyenne.sixcompanies.com> <200702261159.l1QBx46X006755@cheyenne.sixcompanies.com> <46A1EA91.5000306@dir.bg> <200707252055.50780.max@love2party.net>
next in thread | previous in thread | raw e-mail | index | archive | help
Max Laier wrote: >On Saturday 21 July 2007, Jordan Gordeev wrote: > >>I'm replying to an old and long-forgotten thread to report my recent >>findings. >>There's a bug in PF with modulate/synproxy state. Modulate/synproxy >>state modulate sequence numbers, but don't modulate sequence numbers in >>TCP SACK options. Some firewalls block TCP segments with sequence >>numbers in the SACK option pointing outside the window, which causes >>connection stalls. The bug was fixed in OpenBSD with revision 1.509 of >>src/sys/net/pf.c about an year and a half ago. The bug is present in >>FreeBSD-STABLE. A fix for the bug was imported in FreeBSD-CURRENT with >>the big import of PF from OpenBSD 4.1. >>I'm CC-ing Max to notify him of the bug present in -STABLE and to ask >>him to deal with the issue by either porting the fix from OpenBSD, or >>by documenting that modulate/synproxy state is broken. >> >> > >Good catch - sorry for the delay. Here is the diff (almost verbatim from >OPENBSD_3_8). Please test and report back. I plan to commit this to >RELENG_6 in a bit. > > > The patch fixed the problem I was having with modulate state and SACK on my lightly loaded personal NAT box.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?46A90266.5050204>