[pptp-server] Unsupported protocol errors from pppd?

[Nate Carlson]

On 17 Dec 1999, Patrick J. LoPresti wrote:

> This is with pptpd-1.0.0 and ppp-2.3.10+mppe+stateless patches.
> 
> For some of our clients, PoPToP is working great.  For others, we log
> a bunch of messages like the ones below.  As you can see, pppd is
> complaining about "unsupported protocol" errors, after the PPP link
> has been negotiated and authenticated.  There is no pattern to the
> protocol numbers that I can discern.
> 
> Based on my limited knowledge of this stuff, I am guessing this is
> some sort of HDLC weirdness (address/control field compression
> problem?), since the protocol field comes just before the data in the
> PPP/HDLC frame.
> 
> Does anyone have suggestions for sorting this out?  I am willing to
> hack pptpd and/or pppd to gather more information, but suggestions
> from an expert as to *what* information I should gather would be
> helpful.  I also have more complete debugging logs if anyone wants to
> see them.
> 

Is this a Win98-a box per chance? If it is, you need to grab the file
'dun40.exe' from Microsoft's web site and apply that. That's the problem I
was having.. Win98-a encryption is borked out of the box.

-- 
Nate Carlson <carlson at real-time.com>    | Phone : (612)943-8700
http://www.real-time.com                | Fax   : (612)943-8500