ipfw, IPSec, and natd
terrio at rescomp.berkeley.edu
Wed Jun 7 16:35:26 PDT 2006
Weirdly enough, now that the AH requirement is relaxed, packets are
being dropped at random and connections to the computer via mynfsbox are
failing at random.
I did post to freebsd-questions before, but no responses were given.
I'll give it a day or two on this list before re-posting with more
info on the questions list. Thanks a bunch.
On 13:58 Wed 07 Jun , Toni Schmidbauer wrote:
> At Wed, 7 Jun 2006 01:35:16 -0700,
> Devin Heckman wrote:
> > has ipfw, IPSec, and natd running, and fails to mount nfs from mynfsbox
> > when all three run at once with the "divert" rule enabled (if I'm right,
> > it's because natd is rewriting some information in packets which makes
> > IPSec decoding fail--but hopefully this isn't the case, as I wouldn't
> > know even how to begin fixing natd).
> > myrouter = 192.168.0.10, 10.0.0.1
> > mynatbox1 = 10.0.0.2
> > mynatbox2 = 10.0.0.3
> > mynfsbox = 192.168.0.11
> > IPSec
> > mynfsbox <--------> myrouter
> > | not IPSec
> > |<---------> mynatbox1
> > |<---------> mynatbox2
> > /usr/local/etc/ipsec.conf:
> > spdadd 192.168.0.10/32 192.168.0.11/32 any -P out ipsec esp/transport//require ah/transport//require;
> > spdadd 192.168.0.11/32 192.168.0.10/32 any -P in ipsec esp/transport//require ah/transport//require;
> could your repost your excellent description to freebsd-question@? i am
> not that kind of an ipsec guru, my setup locks a bit different. for
> sure there are ipsec gurus on the ml.
> your ipfw rules show that you divert every packet over sis0 to
> natd. i would try to specify only those addresses which should get
> rewritten by natd (in your case 192.168..). so packets sent from
> myrouter to mynfsbox do not pass natd.
> another thing i would try is to disable ah (just remove
> ah/transport//require) from your ipsec.conf file. ah is not necessary
> for an encrypted connection, it provides protection against replay
> If you understand what you're doing, you're | toni at stderror dot at
> not learning anything. | Toni Schmidbauer
> -- Anonymous |
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