How do I only allow Secure POP/SMTP on cPanel?

I am on a crusade to lock down my new VPS as much as humanly possible and I want to only allow POP3S and SSL SMTP. Since they are working now, how do I disabled POP3 and only allow POP3S? Same with SMTP (I hear that SMTP might fail if it can't access port 25?).

Yes I am parinoid, but this is only the beginning. I have already made one of my IP's I have for my VPS just for SSH (no other stuff runs on it (well domains resolving anyways). Along with disabling FTP. I am the only one using the VPS.

Any other suggestions to make my VPS as secure as possible (only allowing SSH from my IP isn't simple since I am on dynamic (same IP for months and months) and have no clue when it will change. I also need to figure out how to setup SSL for a few domains with admincps (wordpress, vbulletin, etc) to make them more secure.

Thanks

 

 

 

 

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