Port 1002 and 1720 issues
Posted by Wilhelmus
"
1002
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This port's apparent association with Microsoft's ICS (Internet connection sharing) was discovered empirically by noticing that only people who were using ICS had this port open, and that everyone who was using ICS (and necessarily NetMeeting), without any additional external protection, had this port open and exposed to the Internet
...
"
http://grc.com/port_1002.htm
and
http://grc.com/port_1720.htm
Try disabling the ICS service.
Also, does the Sygate firewall have option do disallow/block certain ports? If it does, block those ports, if that helps.
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