First off,bit of background, a firewall expert I am not. I know how to install and make sure it's running, and how to answer the various popups, in order that application rules are created. To actually create an advanced rule, to me, would be like aiming the space shuttle at the moon. I'd miss. Anyway I've been trying a few different firewalls, over the months. PCTools, Outpost, and most recently, Sygate (5.6.280. Sygate has impressed me a great deal. Nice interface, good logging, seems intuitive to use, all ports show as stealthed at Gibsons firewall test site, ShieldsUp. (Neither PCTools nor Outpost returned similar results; there were 2 or more ports simply closed. No biggie, but a factor.) Now my Secunia PSI has warned me that Sygate is end of life. I care not. But it does have some reported vulnerabilities, indicated in this advisory list. (Check for vulnerabilities 2003/2004) I think the version I have was made in 2005. Question: Should I be concerned about this? The most critical vulnerability is in regard to a possibility that port 137 could present an attack vector, because it allows UDP though it's supposed to block it.