Windows 7 - VPN failure for only one client. XP SP3 -> 2003 ISA server

Asked By netgy

04-Feb-09 03:08 PM

I have just one client that is not connecting to the ISA server.
XP SP3 using default windows VPN client (connect to a network)

I have tried turning off the firewall and virus protection but still get the
721 error while connectiong

for responses using the pptpclnt client we get the ussual working responses.

Successfully connected to server using TCP port 1723 (PPTP)
Sending data to server

Waiting for a reply to the data which was just sent...
waits 30 seconds here
Recieved a reply. Reply contains the following text:
--->

===========================
Connectivity test to TCP Port 1723 was successful!!!
Closing down the socket...
===========================

Createing a socket to test GRE protocal traffic...

Total GRE Packets sent = 1
Total GRE Packets sent = 2
Total GRE Packets sent = 3
Total GRE Packets sent = 4
Total GRE Packets sent = 5

===========================
Check server to see if the GRE packets were recieved successfully
===========================

Closing down socket

Goodbye!

on the ISA server monitor I get

PPTP Initiated connection
PPTP closed connection

5 GRE responses with
Unidentified IP Traffic (GRE:0) Denied Connection default rule


other clients have no problem connecting it is just this one client.

when I try to connect to the localmachine using pptpsrv in another window I
get the same thing with the exception of

Recieved a reply. Reply contains the following text:
--->Hello, there! This is a reply from the server.

04-Feb-09 04:06 PM

and on a side note there is nothing between the ISA server and XP machine on
the same outside subnet to test so there is no firewall out there between the
2.

05-Feb-09 04:38 PM

was able to get this computer functioning again by removing Cisco's VPN
client running a registry cleaner. verifying that connection would work
again. then reinstalling Cisco VPN client and again verifying that it still
works.

05-Feb-09 06:05 PM

Thank you for the update.

--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com