right. many .edu networks do this, but still block all incoming traffic by default and allow by exception. Sometimes there will be a lot of servers which serve http or ftp to the outside world, and ...

My ISP is now assigning non-routable IP's (10.x.x.x). I was told that this is only temporary because they will need to get another block of 24.x.x.x IP's. Has anyone heard anything like this before??