Windows Vista or 7 Timeout
Windows Vista Firewall blocks ISAKMP Keepalive messages which are required to maintain the VPN connection.
If your RoamNet connection is idle for 5
minutes (approximately) the Cisco Systems VPN Client terminates the VPN
tunnel. Subsequent re-authetication is required. This is a known issue
with the Windows Vista Firewall * blocking ISAKMP messages.
@echo off netsh advfirewall firewall delete rule name="UCL RoamNet Cisco VPN ISAKMP" netsh advfirewall firewall add rule name="UCL RoamNet Cisco VPN ISAKMP" dir=in program="%PROGRAMFILES%\Cisco Systems\VPN client\cvpnd.exe" localport=500 remoteport=500 protocol=UDP remoteip=188.8.131.52/29 action=allow netsh advfirewall firewall show rule name="UCL RoamNet Cisco VPN ISAKMP" pause
* This is regardless of the Windows built-in Firewall statues. Even if a 3rd party firewall (e.g. FSecure, Norton, AVG) is installed and the built-in firewall is disabled the firewall rules still apply.