Date: Thu, 14 Mar 2002 12:30:38 -0500 From: Chris Johnson <cjohnson@palomine.net> To: Dan Langille <dan@langille.org> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: ipfilter keep state broken? Message-ID: <20020314123038.B43330@palomine.net> In-Reply-To: <20020314172627.DEF953F0E@bast.unixathome.org>; from dan@langille.org on Thu, Mar 14, 2002 at 12:26:27PM -0500 References: <20020314164723.4E1543F0E@bast.unixathome.org>; <20020314121048.A43100@palomine.net> <20020314172627.DEF953F0E@bast.unixathome.org>
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[-- Attachment #1 --] On Thu, Mar 14, 2002 at 12:26:27PM -0500, Dan Langille wrote: > On 14 Mar 2002 at 12:10, Chris Johnson wrote: > > > On Thu, Mar 14, 2002 at 11:47:21AM -0500, Dan Langille wrote: > > > I upgraded my webserver on March 9 from the post 4.5-RELASE stable. Today > > > I've been noticing very unusal access issues on the box. For example, I > > > could not get to my webserver from one remote box using https. I had to > > > change my rules before it would work: > > > > > > Here is the after and before. I had to replace the keep state with two > > > rules (a.c.b.d is the IP address in question): > > > > > > < pass in quick proto tcp from a.b.c.d/32 to any port = https > > > < pass out quick proto tcp from any to a.b.c.d/32 port = https > > > --- > > > > pass in quick proto tcp from a.b.c.d/32 to any port = https flags S keep state > > > > Could it be that this didn't actually fix your problem but that you made some > > other change in the process? For example, did you flush your state table? Is it > > possible that it was getting full? > > I agree with your theory. Thank you. > > After doing an ipf -FS to clear the state table, everything was still > working fine. Then I reinstated my keep state rules and things went back > to normal. > > Any suggestions to avoid this problem in future? Thanks. Do all of the "pass...proto tcp...keep state" lines in your rules file include "flags S"? I recently had a similar problem caused by my leaving out flags S on a tcp keep state rule. Chris [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (FreeBSD) Comment: For info see http://www.gnupg.org iD8DBQE8kN49yeUEMvtGLWERAhv7AKDvPAjJEqXpnw+ASnEH0lyR0HNLBgCgwBjo FrpWcrSy/sDJIhmKyv+ikgs= =69El -----END PGP SIGNATURE-----
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