Nix347,do you know what the sygate website did for your UDP scan?What they did is just only port scan your ports while not a doing a UDP flood test for you.If you are really interested whether are you stealth in your firewall,please get a port scanner to scan it yourself for open ports.What their scan is mainly looking in your system for UDP response which mean that to test whether are you prone to DDOS.

As what you say about the grc plug and pray which you use to disable it,is not really reliable.Why don't you manual check it yourself since i have given you the website.If you think your system is prone to UDP test which is not stealth,you better port scan your own router instead of your system.I have also used sygate Pro before and they are really stealth when doing their online test.The problem is that you may not have properly configure your system well such as updated your update patches by MS,disable useless services,etc.I have no doubt about sygate firewall but i do have doubt about your experience in configure it properly.I have seem lot of people complaining the firewall which mainly are those newbie.Use the shawdow scanner to scan your system but this is a shareware.

Here is the link -->http://www.safety-lab.com/en/