"Kevin J. Stephenson"
A lot of companies that get Net access never setup the reverse DNS entries out of sheer laziness on their assigned class C, and their upstream provider doesn't care. Feds probably have Class A and B addresses anyways.
Traceroute doesn't use DNS, it doesn't need to as it already has the IP numbers. DNS is a system which provides IP numbers when you give it a domain name. Reverse DNS provides a host name to an IP address but Traceroute doesn't use it. Traceroute works at the router level. Traceroute is like Ping but provides information on every hop including IP number and assigned device name. With Traceroute if a host name is not received, when requested of course, it is because the equipment was not assigned a host name or it is deliberately suppressed. I don't use Traceroute a lot but this is the first time I have seen host names suppressed. A lot of routers have ICM suppressed and will not provide a device name. If an end user site wants to provide better security they will turn off ICM packets. At that point Traceroute doesn't work at all. Virtually Raymond D. Mereniuk Raymond@fbn.bc.ca