What are some sources to educate myself on firewall, and especially ways to test them? I've always been partial to O'Rielly books, but not all are the "best" to go with. Also, any good sites? I'm looking for some good low-level implementation advice, caveats, etc. I'm currently using the SuSE firwall software, and as far as I can tell it seems to be working just fine. But since I don't have a *really* good working knowledge of them I don't trust that I really have things battened down, so to speak. Also, I've heard that there are some online web sites that offer basic/trivial security scanning? Ie. Apparently some security consultancy sites can scan your box remotely to look for the more famous/obvious/common security holes. Who/what are they and are they worth using? -Jason __________________________________________________ Get personalized email addresses from Yahoo! Mail - only $35 a year! http://personal.mail.yahoo.com/