Ah yes, I did the math on the way home. I hastily typed my last post before catching my train and put a 2 where I meant 8. I realize my mistake and am rather embarrassed for posting before thinking. I am sorry to waste your time, but I appreciative of all your help. I'll be more careful in the future. Thanks, Dan > > which would be: x.x.168.0/21 > > > of 255.255.242. > > ahh...no... 255.255.248.0 maybe? > > > As I said the private space mirrors this IP space. > > This is a legitimate public IP subnet. How do I define it to iptables, > > since the public IP space is not as I would expect in iptables either. > > as a /21... > > this message on IP Subnetting has been brought to you by the letter 'S.' > > -j > > -- > "Weaseling out of things is important to learn. It's what separates > us from the animals...except the weasel." > --The Simpsons >