Installed Ubuntu 10.04 a few days ago. Very impressive and I'm now using linux regularly again. I always intended to install hardened gentoo with grsecurity, pax and selinux, but apparmor is so easy to use and ubuntu much easier to install. If you don't know what AppArmor is, take a read here: http://ubuntuforums.org/showthread.php?t=1008906. In short, AppArmor provides restrictions of the actions applications can perform, acting as a sort of sandbox and providing protection against zero day attacks. Anyway, I have AppArmor configured for Chromium. Found the config on: http://bodhizazen.net/aa-profiles/. Several others are there, including Wireshark. I'm looking for configs for pptpd and snort, if anyone has some solid ones. Otherwise, I might very well write some rules myself and post them once they are done. Feel free to use this thread to share/request AppArmor configs or share how much you love AppArmor.