Windows 2003 Firewall intermittently blocks VPN

Windows 2003 Firewall intermittently blocks VPN

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Subject Author Date
Windows 2003 Firewall intermittently blocks VPN Joe 10-19-2005
Posted by =?Utf-8?B?Sm9l?= on October 19, 2005, 1:06 am
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I have a Windows 2003 WE out on the web (no physical firewall) with the
windows firewall turned on. I'm using it as a development server and I want
VPN access to it's shared folders. I tried configuring Routing and Remote
Access but it won't allow the firewall to run. I un-configured that and used
the network connection wizard to configure incoming connections. Everything
worked just great - firewall was on, I could connect via VPN, I could map to
the shared folders, life seemed good. Every now and then I had trouble
connecting via my client VPN connection, but usually after 2-3 attempts I
could connect. Every now and then I would lose my connection, but my guess
it was inactivity. Today I couldn't connect at all - my VPN client hangs on
Verifying username and password... If I remote desktop to the server and
turn off the firewall, I can connect no problem. How can I troubleshoot this
problem? I turned Firewall logging on and I see when the connections are
opened and closed - but there are no significant drops. Anybody know what is
going on here?

Posted by Steven L Umbach on October 21, 2005, 2:11 pm
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Look in the logs via Event Viewer to see if anything pertinent has been
recorded regarding the Windows Firewall. When you use Remote Desktop to
access the computer check the firewall configuration to see if anything has
changed in regards to ports used for VPN connection. --- Steve


>I have a Windows 2003 WE out on the web (no physical firewall) with the
> windows firewall turned on. I'm using it as a development server and I
> want
> VPN access to it's shared folders. I tried configuring Routing and Remote
> Access but it won't allow the firewall to run. I un-configured that and
> used
> the network connection wizard to configure incoming connections.
> Everything
> worked just great - firewall was on, I could connect via VPN, I could map
> to
> the shared folders, life seemed good. Every now and then I had trouble
> connecting via my client VPN connection, but usually after 2-3 attempts I
> could connect. Every now and then I would lose my connection, but my
> guess
> it was inactivity. Today I couldn't connect at all - my VPN client hangs
> on
> Verifying username and password... If I remote desktop to the server and
> turn off the firewall, I can connect no problem. How can I troubleshoot
> this
> problem? I turned Firewall logging on and I see when the connections are
> opened and closed - but there are no significant drops. Anybody know what
> is
> going on here?



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