Comment Already done... (Score 2) 206
My ISP, xs4all blocks my connection automatically when trojans or other malware starts to make outbound connections.
I know this as I am responsible for several people on this connection, one of them connected a laptop which triggered this.
When this happens all my ports are closed at the ISP and I get a notice to connect to their proxyserver so that I can download protective means.
When I solve the issue I get a checkup and after that all goes well, the ports are reconnected.