1 - disable p2p , torrents
There's a contrib for that: ipp2p
2 - when the sme server know that any pc in the network have aviruse stop the internet service on it and tell the pc owner that his pc have aviruse
Only doable manually, as admin you'll receive messages when a virus is detected via email.
3 - i want to stop the internet server from any pc in network from the sme server
Block internet access?