I am trying to set it up so that mobile users that connect over VPN can use the IP communicator software. So far, if I am on WIFI at the office I can only get the software to register, but not make or receive calls. If I am on another location's Internet, I can not get the software to register or make/receive calls. Is this even possible, or am I do I need to allow a specific set of ports? I ran a packet sniffer and have not seen any traffic that could indicate a blockage or potential traffic to my CUCM server. TIA.