I have a weird problem with the VPN on my ISA server 2006 SP1 server. If I reboot the ISA server, it will run fine for a little while. Everything will work including the VPN. After a while "something" happens. I am not sure what, but the VPN will stop connecting. If I watch the logs, I can see it initiating the VPN connection and then later closing the connection, but it wont connect (Error 800). If I then reboot, it will work fine for a while longer. I need help troubleshooting this.
Could this be caused by an overloaded internet connection? We are waiting for an upgrade. Right now, we are pushing the limit of our current connection. If it was bandwidth I would think it would work in the down times, but it doesn't. Once it stops working, it doesn't work again until I reboot.
Could this becaused by an attacK? I keep seeing Halfscan attacks throughout the day? Any help troubleshooting this would be appreciated.