I recently installed port explorer on my computer. One of the first things I noticed was that vsmon.exe/True Vector Service, the main component of Zone Alarm, was connecting to my router on port 0, using the protocol IPv6. I was wondering if any Zone Alarm users out there noticed any similar activity from vsmon.exe or true vector service, and if anyone knows why this is happening. I was concerned because I once heard something about port 0 being used to circumvent firewalls, and IPv6 is a somewhat unusual protocol. I contacted Zone Alarm support but they were of little help stating that they would "hopefully" be able to email me an answer some time later next week. Thanks in advance to anyone who can offer advice!