Troubleshooting Tip: How to fix 'SSL connection is...

esalija · 11-11-2025

Description This article describes the issue of FortiSwitches using Hardware Switch as an Interface type going offline after updating the FortiGate from v7.6.2 to v7.6.4. The article provides a step-by-step workaround to resolve this issue. Scope For...

esalija · 11-05-2025

Description This article describes the issue of ULL interfaces being down after updating FortiGate to version 7.4.9. It provides a step-by-step guide to troubleshoot and resolve the issue. Scope FortiGate. Solution To troubleshoot the issue of ULL in...

esalija · 10-24-2025

Description This articles explain how to determine what caused an IP address to be quarantined due to DLP (Data Loss Prevention) or content analysis. Scope FortiGate, FortiProxy. Solution To investigate the quarantined IP, start by checking the DLP l...

esalija · 09-17-2025

Description This article describes the process of configuring SSL traffic mirroring with a focus on modifying the Destination MAC address at the policy level, allowing administrators to accurately duplicate SSL traffic for analysis or inspection. Sco...

esalija · 08-18-2025

Description This article describes the configuration side of the Automation Stitch when Multiple Link Monitors are implemented and receive an email for a specific Link monitor change. Scope FortiGate. Solution When one of the link monitors goes down ...

esalija · 11-19-2025

Hi @RolandBaumgaertner72 To troubleshoot the issue of all FortiAPs showing as offline, follow these steps: - Use the sniffer command on the FortiGate to check if CAPWAP communication is occurring between the FortiAPs and the FortiGate: diagnose sniff...

esalija · 11-19-2025

Hi @ firewallqvl, Check TCP Half-Close Timer - One possible reason for this error is that the session was closed according to the 'tcp-halfclose-timer' before all data was sent. - You can extend the TCP half-close timer for the specific port used by ...

esalija · 11-14-2025

Hi @Timur1 Based on the information provided, here are some potential causes and troubleshooting steps for the DPD failures in your IPsec tunnels: Check for any network path issues that might be causing intermittent disconnections. This includes ISP ...

esalija · 11-14-2025

Hi @Iamyourjoy33 To configure an automation stitch for different conditions based on failed login attempts, you can follow these steps: Define Event Handlers: Create two separate event handlers in FortiAnalyzer for each condition. For User A, set the...

esalija · 11-10-2025

Hi @Kennylin To troubleshoot the issue where a client with the IP address x.y.z.133 is unable to access the VIP, follow these steps: 1. Ensure that the firewall policy allowing access to the VIP is correctly configured and prioritised. The policy sho...

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Troubleshooting Tip: FortiSwitches go offline after update v7.6.4

Troubleshooting Tip: ULL Interfaces down after the update of FortiGate

Technical Tip: How to determine what caused an IP address to be quarantined due to DLP or content analysis

Technical Tip: Change the destination MAC address for Mirror SSL traffic

Technical Tip: Receive an email for a Link Monitor when Multiple Link monitor are configured in an automation stitch

Re: 4 FortiAPs this morning offline - what can we do?

Re: No session matched error, unable to activate the EZVIZ camera.

Re: dpd_failure

Re: Configure automation-stitch to detect user trying to log to FortiGate GUI

Re: Fortigate 40F VIP not working for same network

Troubleshooting Tip: How to fix 'SSL connection is...

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Re: How to fortigate admin-lockout-duration clear

Re: Fortigate Evaluation License Offline Mode

Re: interface down!

Re: Is there any difference between the fortiguard...

Re: Fortiguard SSL gateways

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