I run a firewall, but I also sit behind a router. My router does nor stealth port 113, but rather keeps it closed. I have read that stealthing port 113 can impact your email if your email server uses and old protocol called INDENT. So are you all 100% stealthed? I read that all you must do to stealth port 113 is create an entry in the forwardig table to route all port 113 requests to a nonexistant IP address. Has anyone done this?