Date: Fri, 23 Jul 2004 00:55:56 +0200 From: Max Laier <max@love2party.net> To: pf4freebsd@freelists.org Cc: othermark <atkin901@yahoo.com> Subject: Re: fixing out of order first fragment processing? Message-ID: <200407230055.57014.max@love2party.net> In-Reply-To: <cdpf9q$o0t$1@sea.gmane.org> References: <cdpbts$om0$1@sea.gmane.org> <200407222359.23147.max@love2party.net> <cdpf9q$o0t$1@sea.gmane.org>
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--Boundary-02=_9XEAB+OKeZCwhR/ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Friday 23 July 2004 00:32, othermark wrote: > Max Laier wrote: > > On Thursday 22 July 2004 23:34, othermark wrote: > > Activation of pf with a > > scrub in on <interface> fragment reassemble > > rule works as workaround. > > Thanks for this suggestion, > > I have a 'scrub in all fragments reassemble' that I just added and loaded > to my /etc/pf.conf, which does not seem to solve the problem. Do I have = to > specify a scrub for each interface in this case (maybe a better question > for the pf list)? Moved. It actually should. Can you please try to # pfctl -x misc and check = the=20 console? I might well have something wrong, need to cross check. > > In every case you have to decide if you want to > > invest the required memory to store fragments, which might make you > > easy/easier prey for DoS-attacks. Usually, for an average gateway the > > cost is worth the gain (=3D increased security). > > Most of the current systems today are able to handle both types of > sequences. It really is a small processing hit, FreeBSD already does > some bufferring with proper safeguards/maximums for various > traffic patterns. > > I would suspect some NFS/udp interoperability problems with the way it > handles fragments right now. > > -- > othermark > atkin901 at nospam dot yahoo dot com > (!wired)?(coffee++):(wired); > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" =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 --Boundary-02=_9XEAB+OKeZCwhR/ Content-Type: application/pgp-signature Content-Description: signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQBBAEX8XyyEoT62BG0RAsSqAJ9Qq6lEDIpsoa23jNz2clVf6smbqACfYu7P WcS5kqjzumnrQnfRl4ve5E8= =ipQP -----END PGP SIGNATURE----- --Boundary-02=_9XEAB+OKeZCwhR/--
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