Torgeek
The most common way to block Tor traffic would be to locate an updating list of Tor exit nodes and configure a firewall to block these nodes. A company policy to prevent Tor use may also go a long way to cease its use.
How do you block traffic from Tor exit nodes?
If you want to block outbound Tor exit node traffic, use Application Control. For more information, see Application Control. If Tor exit node traffic originates from a country that you block with the Geolocation service, Tor Exit Node Blocking blocks the Tor exit node traffic, not the Geolocation service.
Should I block Tor?
TOR Entry nodes can be used by malware provided by cyber-attacks to call out to their Command and Control (C2) servers. It is highly recommended that environments block TOR nodes from communicating with your network.
