Scenario
Windows 2008 server configured as VPN/DHCP/DC/DNS. Several clients connect to this server every day using VPN. No issues. However one client has a very unusual problem.
This issue I tested and repeated multiple times on Windows XP and Windows 7 Premium.
Connection worked until last week. Trying to establish VPN connection I get error that server is not reachable. This is the moment where it gets spooky. If I create another VPN connection to antother VPN server I can connect using the VPN connection that just moment ago would not even see the server. (WTF)
The client has Comcast as a provider. I tested this on wired and wireless and it never fails. Unless I connect first to the second (not related server) VPN server I cannot make the connection to the original server. There is one more thing. If I disconnect
the second VPN the other connection will disconnect but not other way aground. It appears that somehow they are connected!!!!!!!!!!and one depends on the other.
I have change the Wireless NAT/Router and the same thing happens. The exactly same thing is happening if I use XP or Windows 7 Premium. No other clients experience any VPN issues. We use IP address to connect so name resolution is not the factor.
My take on this is that Comcast is in fault. It appears that once the tunnel is created they will allow another to be established but the minute the first one is disconnected the other gets disconnected. I disable the AV (Kaspersky on one computer and Norton on the other so no relation to AV (I think).
This is one of the weirdest issues I have ever faced.
Please help.
Robert
ikontakt@hotmail.com
Lakeville, MA
MCT