Ok, I know some of you guys are gonna think I am nuts but for some reason I can't get this. CIDR. I am trying to write a ruleset for my firewall. If I have an IP that is 192.168.0.0/16 I know it is basically 192.168.*.*, and 192.168.0.0/24 is 192.168.0.* but I don't get the 192.168.0.0/12 or /32 etc subnets. I know the subnet for /22 is 255.255.252.0 but what does that really mean in terms of IP address'?Can someone explain in plain English.