Technical Tip: Fortinet SSL VPN with G Suite MFA u...

JNDias · 05-27-2025

Description This article explains an issue where the Web Filter override fails when using Internet Service Database (ISDB) objects on FortiGate. The issue occurs when a user attempts to access a website that is blocked by the Web Filter with an actio...

JNDias · 02-11-2025

Description This article provides information about the current problem, where the GUI admin does not load some pages for FortiGate-50G on v7.0.17. Scope FortiGate-50G. Solution Current GUI problems are: Creating new user groups will fail in loading ...

JNDias · 01-21-2025

Description This article explains why, after updating to version 7.4.4 or a newer version, Security Fabric downstream FortiGate devices cannot validate the EMS certificate. Example: FortiGate Root Fabric: 'Connected'. FortiGate downstream Fabric: Con...

JNDias · 01-17-2025

Description This article describes an error when upgrading a FortiGate 90G/91G/120G/121G high availability cluster from FortiOS v7.0.16 to v7.0.17 or higher branches such as v7.2.x, v7.4.x, or v7.6.x. GUI error: 'Image upgrade failed. The firmware im...

JNDias · 01-13-2025

Description This article describes an error encountered on FortiClient or certain browsers when attempting to connect to the FortiGate SSL VPN. Error: 'The security certificate for this site has been revoked. This site should not be trusted'. The sec...

JNDias · 01-10-2025

If you are using public certificates, another reason can be because the certificate is revoked at the CA level when the certificate uses ocsp.You may check with the following tool: https://www.certificatetools.com/ocsp-checker Example: Full KB: Troub...

JNDias · 07-26-2024

Technical Tip: FortiGate Azure resource list

JNDias · 05-07-2024

Hi, @randomcatperson Thank you for your insightful reply and thorough investigation; your efforts greatly benefit the community. Regarding the issue at hand, I've highlighted two potential workarounds that have been successful for other customers. Yo...

JNDias · 04-30-2024

1st workaround is to change the policy Inspection mode from "Flow-based" to "Proxy-based. Please note that Proxy-based inspection does not allow traffic to be offloaded to NPUs. How to enable the Proxy-based opinion: config system settings set gui-pr...

JNDias · 09-26-2022

Please check this KB: https://community.fortinet.com/t5/FortiGate/Technical-Tip-Failed-to-contact-FortiGuard-servers-due-to/ta-p/189678

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Technical Tip: Web Filter Warning, Authentication, and Override are not supported with Internet Service Database (ISDB)

Technical Tip: FortiGate-50G GUI problems after upgrade to v7.0.17

Technical Tip: EMS certificate verification fails on downstream FortiGate in Security Fabric

Technical Tip: FortiGate 90G/91G/120G/121G HA cluster unable to upgrade due to error (Firmware image is not valid)

Troubleshooting Tip: FortiClient error:' The security certificate for this site has been revoked. This site should not be trusted'

Re: When connecting VPN from FortiClient getting the error message

Re: Start Here: Deploying FortiGate-VM from Azure Marketplace

Re: Fortigates with PPPoE WAN suddenly need TCP MSS 1452 on INSIDE to access HTTPS

Re: Fortigates with PPPoE WAN suddenly need TCP MSS 1452 on INSIDE to access HTTPS

Re: Unable to connect FortiGuard servers

Technical Tip: Fortinet SSL VPN with G Suite MFA u...

Technical Tip: FortiGate-50G GUI problems after up...

Technical Tip: FortiGate 90G/91G/120G/121G HA clu...

Troubleshooting Tip: Debug flow flags

Technical Tip: Restart WAD or IPS when conserve mo...

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