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‎01-13-2026
Last activity: Jan 13, 2026 8:23:52 PM
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Technical Tip: Understanding SD-WAN transition timers (Dead to Alive vs. Out-of-SLA to In-SLA)

01-07-2026
Description This article describes the different states that an SD-WAN member interface can be in (according to Performance SLAs) and the timers that are used to determine how long a transition takes from Dead to Alive, as well as Out-of-SLA to In-SL...

Technical Tip: HA is out sync due to an IPsec interface IP on FortiGate-VM

10-18-2025
Description This article describes an expected behavior for FortiGates on a cloud platform, that HA becomes out of sync when an IP address is configured on an IPsec interface. Scope FortiGate-VM v7.4 and v7.6 in Cloud environments Solution This artic...

Technical Tip: PPPoE interface not passing traffic when first created

10-07-2025
Description This article describes a reported issue where a newly created PPPoE tunnel interface does not initialize correctly, preventing network access. Scope FortiGate v7.4. Solution There are two ways to configure a PPPoE interface: Create a new ...

Technical Tip: DNS traffic is allowed through captive portal without authentication

09-01-2025
Description This article describes an expected behavior where DNS traffic can successfully bypass captive-portal authentication on the FortiGate. Scope FortiOS. Solution When a firewall policy requires user authentication (for example, when captive-p...

Technical Tip: DNS Filter Profile Behavior with a DNS Response NXDOMAIN

07-10-2025
Description This article describes how the DNS filter profile behaves depending on the DNS response received from the DNS server. Scope FortiOS. Solution DNS response codes range from 0 to 5, but the most common response codes are: 0 – NoError: No er...
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