Major Hayden

Remember, if you raise MaxClients for an MPM in Apache, you must raise the ServerLimit directive, which is normally set to 256 on most servers.

If you think you have a rooted RHEL box, you’ll want to run the usual rkhunter, chkrootkit, and you will want to inspect for rogue processes.

So you have multiple users that need to read and write to certain files on the filesystem?

If your server is spewing an invalid HELO, you could be blacklisted pretty quickly.

Setting up Postfix to handle mail for a virtual domain and forward it to external mailboxes is pretty easy.