We have a customer who has their T-1 provided by Paetec. Paetec also provides our T-1 service. As it turns out, our customer is on the same subnet as we are. Both of us are on 63.252.84.xxx and problem is they cannot reach our webserver. Paetec suggested we change our network mask from 255.255.255.0 to 255.255.255.248 to fix the issue.
I would love a clear understanding of why this will make it all workable? Paetec could not or would not explain, just said do it.