Using Application Filter,( Objects > Application Filters) we can create a new group (Name - VPN) of applications based on the category " networking" and subcategory " proxy". More details on how to create application filters can be found in the PAN-OS Administration Guide ( ) A good way to keep up with new applications is to use application filter and block applications based on behavior rather than manually adding each individual application to the security policy.Īpplication Filter dynamically groups applications based on the chosen category.
There are many avoidance applications out there that are being created as demand rises from users wanting to bypass restrictions. Inside the WebGUI > Policy > Security, be sure to create a rule that denies access to the above list, and make sure that the " Service" is set to " Application Default". Just blocking tor and tor2web applications in the security policy is not enough.Ĭreate a security policy to block the following applications to the internet: Like any other anonymizer, Tor uses different techniques to bypass your security. Palo Alto Networks has created applications such as tor and tor2web to identify Tor connections. Use as many of these configurations as needed to properly block Tor. In many cases, just using a single capability is not enough. Note: Blocking any evasive application like Tor needs a combination of different capabilities as outlined above. Source/Dest Based Control using External Dynamic List The following configurations on the Palo Alto Networks Next-Generation firewall can block Tor application traffic on your network.īlocking Untrusted Issues and Expired Certificates with a Decryption Profile Anyone who tries to trace would see traffic coming from random nodes on the Tor network, rather than the user's computer. The Tor network (The Onion Router) disguises user identity by moving their data across different Tor servers, and encrypting that traffic so it isn't traced back to the user.
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