Hello, I asked this question a while ago and it was solved configuring the hardware Firewall.
The situation has changed though: I need to block access to a particular webpage on a series of clients in a school, but I can't use the firewall anymore.
The reason is this: the clients are now being used by teachers to connect their tablets/notebooks to the wifi network. I have configured the clients so they share their internet connection via wifi (we don't have a wifi connection in classes, it's all cable).
If a client is blocked, the tablet/notebook connecting to it will be blocked too, but I need them to have no restrictions.
So, I'm looking for a software based solution to this. Some way to block web pages on the clients. I couldn't find a good software for this.
The hosts file won't help me because it doesn't work with web pages, but only whole websites.
I hope somebody can help me. The server is Windows SBS 2011 and the clients are all Windows 7 Professional.