For instance, i would like to only allow 1.2.3.4 and 5.6.7.8 IPs to be allowed to SSH into the server, i know i can do 2 seperate lines, but im hoping to stick all the IPs i need in a variable like: ALLOWED_IPS=1.2.3.4,5.6.7.8 I just wasn't sure if iptables could read the ',' and know to allow those IPs from one line. I plan on making a few IPs only to allowed to use certain ports in the firewall, this will just help me get started, thank you.