I have an agent phone setup on a site to site VPN using 2 PIX. Phone works fine, but when I login to CAD says "unable to log in agent for the phone that is on the VPN. IPCC Express 3.5.2 CAD 4.5.5.
CAD does work on the VPN PC if the phone is logged in at the main site.
TCP ports are blocked, hence unable to received the messages, try webview to monitor.