VPN TCP/IP CP reported error cp 31

[networking4dummies]

I am running a Windows Server 2000 - SP4. RAS seems to
be setup properly - clients can happily connect, pull
DHCP relayed IP addresses from the network DHCP server,
and resolve network hostnames while connected.

But I have this one user who has decided to be a problem
child -- When the MS client attempts to connect to the
server they get the following error:

Error Connecting to <vpn name>
Checking network protocol connections... TCP/IP CP
reported error 31: A device attached to the system is not
functioning.

The problem child's OS is Windows 2000 Professional - SP
4 and there is nothing obvious that sticks out, with the
exception of the fact that they use SBC Yahoo! DSL
software that creates that horrible P.P.o.E. connection.
I have other DSL P.P.o.E. DSL users that seem to login
ok, though. DNS resolution and access to all outside
application ports for this user seems pretty normal --
there are no other glaring internet access or TCP/IP
configuration issues for this person.

I have descended into the darkest bowels of the MSKB and
Google w/out an answer. If you can help me I will follow
you around and worship you and name my first offspring
after you.

Your devoted (and creepy) servant,

-networking4dummies

 

[monkeyboi]

Problem solved. The P.P.o.E. software, a.k.a. virtual
adapter was causing this problem to occur.

Had the end user uninstall P.P.o.E. software, move to a
Linksys router to handle the P.P.o.E. login (with PPTP
passthrough enabled) and everything turned out ok.

 

[Guest]

We were having the same problem with a few users finally
found out that on some machines the 1394 adapter was
causing a conflict, disabling the 1394 net adapter fixed
the problem and no more error 31. hope this helps