I'm not sure if anyone around here would have any knowledge of this but here is the scoop.
We have a client that hosts an FTP and they are under constant attacks. We decided as a safe guard instead of blocking the intruders IPs, to instead block all IPs and allow the range of IPs for their remote clients.
This was working fine until one of the guys with hughesnet called. We allowed his IP range, but it doesn't let him in, but if i allow all traffic, he can. It appears his modems WAN ip isn't what actually goes out, so i'm assuming it hops somewhere, then there is another true WAN IP from hughesnet.
I tried contacting their support, but its a major pain in the ass, so i figured i'd see if you guys have had any experience with this.