pf and keep/modulate state on 6.2
max at love2party.net
Wed Jul 25 23:58:31 UTC 2007
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 at 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 = no go in a RELENG
branch). In HEAD we have 4.1 since a couple of weeks.
/"\ Best regards, | mlaier at freebsd.org
\ / Max Laier | ICQ #67774661
X http://pf4freebsd.love2party.net/ | mlaier at EFnet
/ \ ASCII Ribbon Campaign | Against HTML Mail and News
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 187 bytes
Desc: This is a digitally signed message part.
Url : http://lists.freebsd.org/pipermail/freebsd-questions/attachments/20070725/df39f03a/attachment.pgp
More information about the freebsd-questions