“so which gedoilim were matir the internet????”
Rav Hershel Schachter maintains that if the following three precautions are taken, it is permissible to use the internet:
1. Areivim, or some other form of buddy system, in which a list of every website you connect to will be sent to a predesignated friend or rebbi.
2. A good filter.
3. The computer must be in a location where people can/will walk in at any time and see what you’re doing.