Anonymous_User Absent Member.
Absent Member.

Client 4.91 and DUN: error 720

I am having a problem with DUN on a notebook PC running WinXP SP2. I am
also using the Novell Client 4.91 (I am pretty sure it is 4.91 SP2).
When I try to use DUN, I get anerror 720 (PPP Protocol error, DUN could
not negotiate a compatible set
of network protocols. Check all settings make sure connection is only
TCP/IP and that network only has 1 adapt.)

Is there a way to fix this issue with DUN networking on the client
4.91? I have tried to uncheck usage of the Novell Client and IPX/SPX
for the device which is connecting via DUN.

Mike McWhinney
elja, Inc.

Labels (1)
2 Replies
Anonymous_User Absent Member.
Absent Member.

Re: Client 4.91 and DUN: error 720


The Novell Client may not be directly related with the PPP error, but
its possible there are invalid entries or other corruption already present.
I've seen a couple Windows 2000 boxes in the past producing 720 errors
with VPN clients. In these cases it revolved around users
adding/removing firewalls, VPN clients or other network interfaces...

Date: Wed, 04 Sep 2002 20:42:33 GMT
Subject: RAS error message

I've read it can sometimes be addressed with resetting TCP/IP or Winsock...

Repair/Reset Winsock settings

RAS Errors 611 and 720 With PPP or SLIP

You may find a few suggestions by searching Forums.ModemHelp.Net...

Tony Pedretti
Anonymous_User Absent Member.
Absent Member.

Re: Client 4.91 and DUN: error 720


Thank you for the reply.

We do not use any VPN components on this network, so the VPN issue is
irrelevant (I think). I tried the netsh fix to reset network settings
using the following:

netsh int ip reset resetlog.txt

This didn't fix the problem. It actually screwed up some of my network
properties for one network adapter. I had to use system restore to
bring back the system to the way it was before. I don't know if netsh
winsock reset catalog would mess up the adapter. I guess it can't hurt
to try it.

I found something that might be worth trying. From Microsoft's KB:;en-us;810979


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