Date: Sun, 07 Dec 1997 20:11:26 +0000 From: Brian Somers <brian@awfulhak.org> To: Douglas Pokorny - FES - CMG ~ <dpokorny@pcocd2.intel.com> Cc: freebsd-questions@freebsd.org Subject: Re: Strange user-mode PPP problem Message-ID: <199712072011.UAA08987@awfulhak.demon.co.uk> In-Reply-To: Your message of "Sat, 06 Dec 1997 17:01:51 PST." <9712070101.AA18453@fsc015>
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I think you need to poke around at the cisco routing tables (both
before and after the dialup is connected). I'd be surprised if they
change unless you've got some sort of routing software running on
your local net (gated or routed or the equivalent).
> Hello:
>
> I've got a small problem with FreeBSD that I've been pulling my hair out
> about for quite some time. Currently, I'm using FreeBSD 2.2.5-RELEASE.
>
> I can't find anything even remotely related to this issue in either the FAQ
> or on DejaNews, so I'm hoping that you can shed some light on this problem.
> (I've also scoured the man pages and gone over what I can tell to be relevent
> source code :-)
>
> In short, I'm using a FreeBSD 2.2.5-RELEASE box to dial my Company's
> Xyplex terminal server. My end is running user-mode PPP with IP-aliasing to
> serve a local unregistered (192.168.x.x) ethernet network of 7 computers.
> I've got a static IP address on our dial-in subnet.
>
> I've got ip-forwarding turned on for the kernel, and I'm not running any kind
> of routed or gated.
>
> Everything appears to work correctly. All of the machines on my local ethernet
> can get out onto the company's network or make it through our proxy server
> and get out onto the internet.
>
> Here's what's wierd: Something about FreeBSD or the ppp daemon is causing
> our dialin subnet's cisco router to believe that my little dialup connection
> would be a great place to send every single packet that is trying to make it
> off of that subnet. As a result, after being connected for a few minutes,
> the recieve light goes crazy as I receive tons of data meant for other
> networks.
>
> This does not effect other operating systems such as Linux or NT. (Of course
> the NT installations are not trying to do IP masquerading.)
>
> Basically my question is this: Is there anything about FreeBSD's networking
> code which would cause the machine to identify itself on the network as a
> router even if routed is not running?
>
> As far as testing goes, I've also tried the same setup without ip
> forwarding enabled in the kernel and IP masqerading in the ppp driver turned
> off with the same results. As a result, I'm very puzzled.
>
> Thanks for any input that you might have!
>
> -Douglas
>
>
> --------------------------+-----------------------------
> Douglas R. Pokorny | The views expressed here are
> dpokorny@pcocd2.intel.com | my own and do not reflect
> Intel FES - CRG | those of Intel Corporation.
> --------------------------+-----------------------------
--
Brian <brian@Awfulhak.org>, <brian@FreeBSD.org>, <brian@OpenBSD.org>
<http://www.Awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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