Ethereal-dev: Re: [ethereal-dev] Decoding a PPTP/MPPE stream?

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From: Gilbert Ramirez <gram@xxxxxxxxxx>
Date: Tue, 4 Apr 2000 11:41:21 -0500
On Tue, Apr 04, 2000 at 11:07:27AM -0500, Greg Kilfoyle wrote:
> 
> 
> Hi,
> 
> I'm attempting to debug a Linux PPTP (MPPE) session and it won't decode
> the packets that follow the LCP negotiation.
> 
> The first packet after LCP is an authentication packet (CHAP). The PPP
> portion of the packet (after GRE) starts with the PPP protocol (0xc223)
> but ethereal is expecting an address and control field.
> 
> LCP negotiation included the 2-bytes address/control field and negotiated
> address/control field compression.
> 
> Any ideas?

A fix for PPP over GRE was checked into CVS a few days ago. Can you get
the current source from CVS and try it? If you can't, I'll make a tar image
of the source available.

--gilbert