I installed APF (Advanced Policy Firewall) to help manage my iptables as I don't have a lot of time to mess with them on my own. I used it along with BFD and Atomic Secured Linux in my earlier Plesk machine (I might add that webmin is indeed a better package).
In configuring the APF script, one must identify those TCP/UDP ports that should remain open not to upset webmin. I ran nmap to get a peek at the default open ports which was useful but I get the feeling that things are more complicated than that. There are not a lot of resources that I could find on the web listing the ports webmin requires to be opened.
I did open the following TCP ports based on nmap and the little I could glean from the web.
IG_TCP_CPORTS="22,25,53,80,110,143,443,465,587,993,3306,10000,20000,30000_35000"Common inbound (ingress) UDP ports
*** both inbound and outbound ports are the same config.<br><br>Post edited by: mdtiberi, at: 2009/02/24 14:39