Internet = World-wide network of computers. (Network linking networks)
Intranet = A connection within a local network (Network linking a few selected computers)
That sounds almost like a corporate or school message, along the lines of "Your account has been disabled" or "You're not allowed to access this site", but I can't really be sure (most of the time it would probably have something explicitly describing the problem, like one of those two)
Does the link work from any other computers?