I have been experiencing problems with what I've narrowed down to the Cisco VPN Client on my network. I personally don't use the VPN client, but I administer the machines utilizing it. When a Cisco VPN client is installed on a machine I suddenly lose that machine in SMS, my Parent AV server, and it stops receiving my group policy changes. In addition, I cannot ping or remote desktop to the machine. I've found an INI file in the root of the cisco vpn program directory that has a "Stateful firewall=1" option and changing that to 0 does not seem to make a difference. Only when I uninstall the cisco vpn client do these problems stop happening and of course keeping it uninstalled is not an option.
Any hints or tips would be most appreciated.