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Re: Transprent Firewall over PPP
- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: Re: Transprent Firewall over PPP
- From: Philipp Buehler <OpenBSD_(_at_)_fips_(_dot_)_de>
- Date: Wed, 31 Jul 2002 10:44:55 +0200
- Mail-followup-to: misc_(_at_)_openbsd_(_dot_)_org
- Reply-to: Philipp Buehler <OpenBSD_(_at_)_fips_(_dot_)_de>
On 31/07/2002, Greg Fitzgerald <gregf_(_at_)_elitepimps_(_dot_)_org> wrote To misc_(_at_)_openbsd_(_dot_)_org:
> I been reading up on using OpenBSD 3.0/1 and PF to create transparent
> firewalls using a switch and briding two interfaces. My question is, is
> it possible to create a transparent firewall like this when using a PPP
> connection? If so can someone point me in the right direction.
You mean, one interface is ethernet, the other a ppp connection via a modem?
No, this doesnt work. Bridging is a pure Ethernet thing.
Note that ppp(8) can filter IP as well, maybe in less 'quality' then pf..
One thing on my todo is support for something like this:
Where one uses PPPoE between Client and DSL-Modem.
pf(4) on the Bridge could peek into the PPPoE packets.
-current already supports IPsec for a similar setup, and this
is a good start to filter any encapsulated IP (GRE comes into
Dont hold your breath though.
Philipp Buehler, aka fips | sysfive.com GmbH | BOfH | NUCH | <double-p>
#1: Break the clue barrier!
#2: Already had buzzword confuseritis ?