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Date:      Wed, 31 Jan 2001 22:08:08 +0100
From:      Cliff Sarginson <cliff@raggedclown.net>
To:        Josh Paetzel <jpaetzel@hutchtel.net>
Cc:        darryl@osborne-ind.com, freebsd-questions@FreeBSD.ORG
Subject:   Re: ppp packet filtering
Message-ID:  <20010131220808.A1156@raggedclown.net>
In-Reply-To: <001c01c08b9f$14a9b0e0$6100000a@vladsempire.net>; from jpaetzel@hutchtel.net on Wed, Jan 31, 2001 at 10:01:01AM -0600
References:  <E14NzFf-000NA1-00@post.mail.nl.demon.net> <001c01c08b9f$14a9b0e0$6100000a@vladsempire.net>

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On Wed, Jan 31, 2001 at 10:01:01AM -0600, Josh Paetzel wrote:
> 
> ----- Original Message -----
> From: "Cliff Sarginson" <cliff@raggedclown.net>
> To: <darryl@osborne-ind.com>; <freebsd-questions@FreeBSD.ORG>
> Sent: Wednesday, January 31, 2001 9:32 AM
> Subject: Re: ppp packet filtering
> 
> 
> > I hope you get an answer to this. I have asked several times
> > on this list for an expert to give some summary of the mystifying
> > number of combinations available for PPP, filters, ipfw, Nat here, Nat
> > there nat everywhere. And the documentation available is contradictory.
> >
> > I am sure someone out there knows. Pure NAT questions get answered,
> > but mention PPP .. and silence reigns .. lol.
> >
> > Cliff
> >
> > > Greetings,
> > > I use userland ppp with the -auto and -nat flags.  This is a
> > > good combo for me.  I want to do some packet filtering for
> > > security reasons, and wondered if the packet filtering that
> > > you can do with rules in the ppp.conf is good ?  The
> > > tutorials I've seen start off by configuring NAT on the system
> > > then using one of the system filtering programs to do the
> > > job.  Seems like overkill if ppp can do the job.
> > >
> > > thanks for the input,
> > > Darryl
> 
> PPP packet filtering is really the only way that I know of to filter
> when you have a dynamic IP and dialup.  The man page for PPP...
<snip>
The input is great, thanks!
I was not really complaining about the PPP pages, what I think
is not really clear is not the rule-set etc, but *what* to use.
Nat withing ppp, so to speak is suggested in some places, nat
seperately in others. Rulesets as ppp filters in one place,
ipfw in others..and doubtless combinations in between !

Cliff


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