Date: Thu, 26 Jul 2007 01:58:03 +0200 From: Max Laier <max@love2party.net> To: JD Bronson <jbronson@sixcompanies.com> Cc: Jordan Gordeev <jgordeev@dir.bg>, freebsd-questions@freebsd.org Subject: Re: pf and keep/modulate state on 6.2 Message-ID: <200707260158.12963.max@love2party.net> In-Reply-To: <200707251950.l6PJoRxk029389@smtp.sixcompanies.com> References: <200702252202.l1PM2r46003312@cheyenne.sixcompanies.com> <200707252055.50780.max@love2party.net> <200707251950.l6PJoRxk029389@smtp.sixcompanies.com>
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--nextPart2572946.uyDFrVWhmD Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Wednesday 25 July 2007, JD Bronson wrote: > At 08:55 PM 7/25/2007 +0200, 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. > > > >-- > >/"\ Best regards, | mlaier@freebsd.org > >\ / Max Laier | ICQ #67774661 > > Max - 3.8? Cant we get a bit closer and more up-to-date as far as > staying with pf and openbsd? > > I know pf changed - especially for OBSD 4.1 and it would be nice to > be CLOSER than 3.8 ? Well, in RELENG_6 we can't (pf update breaks ABI =3D no go in a RELENG=20 branch). In HEAD we have 4.1 since a couple of weeks. =2D-=20 /"\ Best regards, | mlaier@freebsd.org \ / Max Laier | ICQ #67774661 X http://pf4freebsd.love2party.net/ | mlaier@EFnet / \ ASCII Ribbon Campaign | Against HTML Mail and News --nextPart2572946.uyDFrVWhmD Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQBGp+OUXyyEoT62BG0RAu7gAJ452q6eainvI5fDzlv7IDDeTaDBqgCfSCQu DqvfVaTkHTM+XMXA881HA4g= =9I57 -----END PGP SIGNATURE----- --nextPart2572946.uyDFrVWhmD--
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