As you've been so helpful on my quest for the perfect server, and I think I'm at a stage where I've got a reasonable grasp of what I'm doing. I'm on to my next headache. IPTables.
I've done some research on this but its just all gobbledegook, even the simple guides. I really don't know where to start with this one. I'm wanting to only allow traffic on port 80 which is the web server and obviously me connecting the SFTP along with allowing outbound mail that's being relayed onto google etc. I'm also wanting to protect against common forms of attacks, which I'm not even sure what they would be.