Date: Thu, 01 Jun 2000 02:41:22 +0100 From: Brian Somers <brian@Awfulhak.org> To: "Gallagher, Mick" <mick.gallagher@roke.co.uk> Cc: "'freebsd-questions@freebsd.org'" <freebsd-questions@FreeBSD.ORG>, "'freebsd-net@freebsd.org'" <freebsd-net@FreeBSD.ORG>, brian@hak.lan.Awfulhak.org Subject: Re: User-PPP not seeing incoming PPP packets on 3.4R Message-ID: <200006010141.CAA00793@hak.lan.Awfulhak.org> In-Reply-To: Message from "Gallagher, Mick" <mick.gallagher@roke.co.uk> of "Wed, 31 May 2000 14:37:20 BST." <D76D503DE976D1119C7E00A0C944D87501CA7FDA@RSYS002A>
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> Hi All,
>
> I'm running 3.4R, and trying to get a PPP link established with my ISP.
>
> My /etc/ppp/ppp.conf script pretty much looks like the default example
> script, modified to include my ISP login details.
>
> If I run ppp -backgound <labelname>, then the PPP connection fails.
>
> A brief examination of /var/log/ppp.log implies that the initial outgoing
> LCP config-req is generated and sent, but no reply is received from the ISP.
>
> I don't buy this - the ISP connection works fine with my Windows box.
>
> And so...
>
> (i) Any ideas?
Your best bet is to go back to basics using ``term''. Otherwise,
enable chat logging to ensure that the expected conversation is
happening with your modem. Also ensure that you haven't got
something like ``set openmode passive'' in your config.
> (ii) Can anyone tell me how to get tcpdump to look at the bpf tun thing, so
> I can actually monitor the packet flow?
You'll see nothing until ppp has established a connection. Once this
has happened you can just ``tcpdump tun0'' to see traffic.
> ..and..
>
> (iii) The PPP link actually _worked_ at some point in the past, but I didn't
> save the config script (doh!). I'm pretty sure its the same as it is now,
> except for one (possibly crucial) difference: Since PPP worked, I installed
> an ethernet NIC, and configured the i/f IP address of the NIC as 10.0.0.1.
> Because of this, I changed the default 'dummy' PPP local tun address from
> 10.0.0.1 to 11.0.0.1. (The original PPP 10.0.0.1 address comes from the
> example ppp.conf file).
10.0.0.1 is fine - even though it conflicts with your NIC. You can
have as many conflicting IP numbers as you like as long as at most
one of them is on a broadcast media.
> As ever, any help gratefully received.
>
> Many thanks,
> Mick Gallagher
>
> ----
> mickg@iname.com
--
Brian <brian@Awfulhak.org> <brian@[uk.]FreeBSD.org>
<http://www.Awfulhak.org>; <brian@[uk.]OpenBSD.org>
Don't _EVER_ lose your sense of humour !
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