Fortiguard Web Filtering Bypass -

In this post, we’ll explore common FortiGuard bypass techniques and, more importantly, how to mitigate them. 1. SSL/TLS Blind Spots (The Most Common Mistake) Many administrators enable web filtering but fail to configure SSL Inspection (often called "Deep Inspection"). If you only filter HTTP traffic or use certificate-based inspection without a full man-in-the-middle (MITM) setup, an attacker can simply use HTTPS.

FortiGuard can see the SNI (Server Name Indication) of an HTTPS request, but without full decryption, it cannot scan the URL path or page content. A user can visit https://blocked-category[.]com but if that site uses a valid certificate and you haven’t decrypted the traffic, FortiGate may allow the connection after only checking the domain against a basic blocklist. fortiguard web filtering bypass

Published by: Network Security Team Reading time: 5 minutes In this post, we’ll explore common FortiGuard bypass

A user or attacker can bypass domain reputation checks by using direct IPv4 or IPv6 addresses. They might also edit their local hosts file to map a blocked domain to an allowed IP. If you only filter HTTP traffic or use