I have been debating whether to beef up security on my ISPConfig server. I have the Fedora Core 4 Perfect setup. I also came accross Falko Timme's how to guide on Port Sentry, Log Check, and Chkrootkit. I have already installed Chkrootkit from rkhunter and update it frequently and run scans about once a week. Do I need Port Sentry and Log Check to protect my server from hackers? I had to install Denyhosts since I had hackers from all over the world trying to hack my system through SSH. I would appreciate it if anyone can give some feedback.