I had also tried a different firewall/privacy tool from a company in Canada I think called ZeroKnowledge. That was a great product that also allowed you fine-grained access to and control of all connections to/from your Windows pc. They had a product available for a short time but shut down suddenly. I think I read that they were bought out by another firewall company but can't remember which one. They may have been rolled into the Blackberry software line.
Both of these were available in the 90's lead-up to the dot com bust if I remember right. Sygate became obsolete when support ended around the time WinXP faded. ZeroKnowledge disappeared much earlier. I may have old executables and installers somewhere on antique backups.
Portmaster has been filling this role for me for the last couple years.
Here's another one: F.O.S.I.