Unable to connect to VPN

[ankur.mittal]

I have been unable to connect to my office VPN from my Laptop from home
to work using Microsoft VPN Client. This has worked for me from my
laptop in the past but one fine day it stopped working. I am able to
connect using my Desktop at home.

The dialog box "Verifying Username and Password ..." times out with
Error:721.

I have checked all the preferences and have tried disabling the
firewall etc. and have been unable to get past this issue. Any help
will be greatly appreciated...

 

[Robert L [MVP - Networking]]

It could be the GRE issue. I would upgrade the firmware on the router first.

error 721 and error 800 Q: Error 721 and error 800. I have SBS 2003 Standard Edition. ... When attempting with an domain administrator account I still get those error:721,and 800 . ...
www.chicagotech.net/Q&A/vpn25.htm


case Studies - VPN error 721 and 800 Case 1: When a user attempts to access the Windows VPN server that is behind a Linksys WRT54G, he receives VPN Error 800 or 721. ...
www.chicagotech.net/VPN/vpncase800.htm


cannot establish VPN with error 721 and 800 Whenever he tries to establish the VPN, he receives Error 721 or 800. Troubleshooting: 1. Telnet port 1723 and get respond. ...
www.chicagotech.net/cisco/vpngre1.htm



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
I have been unable to connect to my office VPN from my Laptop from home
to work using Microsoft VPN Client. This has worked for me from my
laptop in the past but one fine day it stopped working. I am able to
connect using my Desktop at home.

The dialog box "Verifying Username and Password ..." times out with
Error:721.

I have checked all the preferences and have tried disabling the
firewall etc. and have been unable to get past this issue. Any help
will be greatly appreciated...

 

[Ankur Mittal]

Updated the Firmware. Still have not been able to connect to VPN. I use
a Netgear WGR614v4 Router/WAP. My desktop is also using the same
wireless access point and it works from my Desktop. Is there a way I
can uninstall/install just the VPN component in the Microsoft TCP/IP
stack?