I'd like to gain some understanding of an existing rule on my firewall that is allowing only a specific range if IP addresses outside. This rule was created by the previous network admin. The rule is: -A FORWARD -s 10.1.1.0/255.255.255.192 -i eth2 -j ACCEPT I understand that the "/255.255.255.192" part of the above rule is allowing only a specific range of IP addresses out to the Internet. How is this rule working and how would I expand the range or create an new range?
