How to block Psiphon 3

FortiGate

FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.

Article Id 197930

Purpose

Some users use Psiphon to bypass restrictive policies configured on a FortiGate.

Psiphon is a circumvention system that uses a combination of secure communication and obfuscation technologies (VPN, SSH, and HTTP Proxy).

The Psiphon codebase is developed and maintained by Psiphon Inc which operates systems and technologies designed to assist users to bypass the content-filtering systems.

Expectations, Requirements
The attached document "How to Block Psiphon 3.pdf" describes how to block Psiphon 3 using a FortiGate running FortiOS 5.2.

Configuration

Troubleshooting

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How to block Psiphon 3

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