I have been trying to get some advice to secure my linux server. It seems like dozen of hackers trying to get in and some of them did get in i guess by checking the "secure log"
do anyone has any suggestion that I should do to prevent this?
I had my firewall setup and selinux on. I installed fail2ban so i guess they can't use the hacking dictionary thing to log on milliion time to guess my password. well, is there anything that i should do?