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pjang
Staff & Editor
Staff & Editor
‎01-23-2026
Last activity: Jan 23, 2026 6:14:20 PM
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Technical Tip: Changing FortiGate interface DHCP mode from Server to Relay in the GUI does not disable DHCP Server (Known Issue)

01-23-2026
Description This article describes a known issue in FortiOS v7.4 and v7.6 (but not v7.2 or earlier) where changing the DHCP mode on a FortiGate interface from Server to Relay does not actually disable the DHCP Server functionality. This can lead to a...

Technical Tip: FortiGate Web Filtering and the impact of HTTP/2 multiplexing and connection coalescing

01-22-2026
Description This article describes how the multiplexing and connection coalescing features of HTTP/2 web traffic can impact Web Filtering and certificate inspection on the FortiGate, why this is expected, and what can be done to improve inspection ca...

Technical Tip: FortiGate FIPS-CC mode no longer supports DH Groups 1, 2, or 5 for IPsec, causes iked Signal 6 crashes after upgrade (Expected Behavior for FortiOS v7.2 and later)

01-20-2026
Description This article describes an expected behavior where the FortiGate loses DH Groups 1, 2, and 5 in the IPsec tunnel configuration when upgrading a FIPS-enabled FortiGate from the v7.0 FIPS specialty firmware to the v7.2/7.4 versions of this f...

Technical Tip: Key considerations when upgrading FIPS FortiGates from FIPS 140-2 (v7.0 and earlier) to FIPS 140-3 (v7.2, v7.4, and later)

01-20-2026
Description This article discusses the relatively recent changes to FIPS-CC mode on the FortiGate when transitioning from FortiOS v7.0 and earlier to v7.2, v7.4, and later. Scope FortiGate, FIPS-CC. Solution As a primer, Fortinet produces a specialty...

Technical Tip: FortiGate FIPS-CC mode no longer supports standard RADIUS, use RADSEC instead (Expected Behavior for FortiOS v7.2 and later)

01-15-2026
Description This article describes an expected behavior regarding RADIUS-based authentication when FIPS-CC mode is enabled on a FortiGate running FortiOS v7.2 or later. Scope FortiGate. Solution First, regarding the FIPS 140-2/140-3 transition for Fo...
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