Question : Using DNS Server to block Websites

I have a network and a Windows NT server with DNS...how can i block certain websites from being accessed by my users???

Answer : Using DNS Server to block Websites

OK, CISCO's are beyond my abilities, but most CISCO's can be configured to do the same thing.  You'll have to ask another expert how to configure the 1720 to block certain IP addresses from being reached.

The simplest way may be to define a false static route.