http://www.configserver.com/free/csf/install.txt takes all of 10mins and this wraps the IPtables in a nice neat bow with a front end for WHM, if you have that..
http://www.lunarforums.com/dedicate...our_tmp_directory_tutorial-t30205.0.html <-- good idea and also /var/shm too..
lotta stuff you can do to secure yourself...
the BIG thing and many don't do it is to set a VERY STRONG root password!! not like sirdude1234, which is gonna get cracked.. try something more like x?FHU%hJeIB}lFB9;b which is impossible to brute force
also.. don't allow root to SSH in.. force them to login with non privileged on a non standard port (like chep says above) then su to root...
