I'm running kerio 2.15 on windows me. I installed outpost pro last night. It's a good firewall. It ran good. Even lighter than sygate free. However, it failed the stealth test at pcflank.com...and at scan.sygate.com. I couldn't get the udp ports stealthed. That's the only part that was failing the stealth tests at both sites. Outpost was completely stealth at grc.com. I know it's not the firewalls fault that it failed these tests. It has to be the user that set it up.LOL. Now, if someone could tell me how to stealth the udp ports..I would probably buy the firewall. I like kerio 2.15 very much. However, I think it's time for a change. I know that outpost pro is a stealth firewall. It's just something I did wrong in setting it up. Even the old free version of outpost passes all stealth tests for me..as does kerio 2.15, sygate and zonealarm free. I guess I should have made a topic asking for help, instead of hijacking this thread I'm going to the outpost forum to see if I can find any info on this.