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Date:      Fri, 11 Feb 2000 21:22:53 +0000
From:      Brian Somers <brian@Awfulhak.org>
To:        "Fisch, Eric" <efisch@kpmg.com>
Cc:        freebsd-net@FreeBSD.org, brian@hak.lan.Awfulhak.org
Subject:   Re: PPP Gateway Routing Problem 
Message-ID:  <200002112122.VAA00392@hak.lan.Awfulhak.org>
In-Reply-To: Message from "Fisch, Eric" <efisch@kpmg.com>  of "Tue, 08 Feb 2000 10:58:28 EST." <8389C74A65EFD111B03800805FA7658F06C04882@USDALEXC01> 

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> I am having what appears to be a routing problem with a PPP gateway and am
> hoping someone can shed some light on the issue.  I have a small network of
> windows/UNIX systems behind a FreeBSD gateway box.  The gateway box is
> providing DNS and DHCP services to the other systems without any problem.  I
> have tried to set up the gateway box to do PPP-on-demand for the entire
> network with limited success.  PPP works flawlessly on the gateway box.
> When I am on the "inside", however, I get nothing.  I am able to connect to
> the gateway, but no further.  Interestingly enough, when I "ping" a system
> from the inside box, I get proper name resolution, but "Host is Unreachable"
> errors as well.  This leads me to believe that I have a routing issue from
> the gateway to the inside boxes.  I think I am missing something in my
> rc.conf settings.  Heck, if I had any clue what was wrong I would not be
> posting.
[.....]
>    gateway_enable="YES"

Aww, that was my first suggestion !

Your best bet is probably to run tcpdump on your internal interface 
to ensure the packets are getting that far.  If they're not, you need 
to add a default route to your dhcpd config.

If packets are getting that far, enable tcp/ip logging in ppp and see 
if the packets are getting that far - proving that you're acting as a 
gateway.  If the packets get that far, enable physical logging to 
ensure that they're being written to the link.

Any eye-openers ?
-- 
Brian <brian@Awfulhak.org>                        <brian@FreeBSD.org>
      <http://www.Awfulhak.org>;                   <brian@OpenBSD.org>
Don't _EVER_ lose your sense of humour !          <brian@FreeBSD.org.uk>




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