I have 2 pcs, A and B and a router R. raffic is routed from A to the internet via B acting as a router to R and R routing to an ISDN line. Router R has some capability of operating as a name server on behalf of the internat. If I telnet R from A or B, it immediately opens the ISDN connection, which I don't want, because it costs. Why is this and how can I stop it? More info. B has eth0 and eth1 interfaces, and runs SuSE 8.0. It also does OS/2, in which case everything works perfectly. I think ping causes the same problem on Linux, but again not on OS/2. I am wondering whether Linux sees the connection out and goes sniffing for routing info or Name Server info or some such. If this is the case, I would appreciate knowing what, and how to turn it off. Any help on this appreciated, so I can complete the migration of B to Linux TIA Vince Littler