On Tue, Jun 23, 2009 at 19:02, Scott Moseman<scmoseman at gmail.com> wrote: > While I did change the config entry and it is logging IP addresses, > apparently that's not my problem. Even when using legit IP addresses my > iptables rejects aren't working? I guess that means its not a > forward/reverse DNS problem causing my issue. I have to use /etc/hosts.deny > to stop some of the ssh attacks. Very weird. If you want some help to diagnose your iptables config, please give some details on what the config is (output of "iptables -nvL" is a good start) and which specific case makes you think it is not working. If you want good tips on how to secure SSH, please do also check this wiki page: http://wiki.centos.org/HowTos/Network/SecuringSSH HTH, Filipe