I have a RouteFinder and I need to Block https pages like (webmessenger.msn.com , e-buddy.com, MSN etc). How can I block these pages?

You will need to know the actual IP addresses and then you need to setup packet filter rules to drop any access to the IP addresses.

Here is a link to some information on blocking Chat and IM programs:

https://webfiles.multitech.com/resolutions/documents/routefinder