Technical Tip: The application signature is missing in application control profile

[SAJUDIYA]

Description	This article describes that the application signature is missing from the application control profile and it is not possible to add it even after upgrading or rebooting the device.
Scope	FortiGate.
Solution	The issue is with the old database which does not contain the TikTok signature (for this example) and needs to upgrade the database. Verify signature last update, which shows below Dec 1, 2015: diagnose autoupdate versions | grep Application -A 8 Application Definitions --------- Version: 6.00741 signed Contract Expiry Date: Sun May 9 2027 Last Updated using manual update on Tue Dec 1 02:30:00 2015 Last Update Attempt: n/a Result: Updates Installed Try to update the FortiGuard server manually as below and re-verify: diag debug application update -1 diag debug enable exec update-now The updated application signature should be visible: diagnose autoupdate versions | grep Application -A 8 Application Definitions --------- Version: 28.00861 signed Contract Expiry Date: Fri Feb 13 2026 Last Updated using manual update on Wed Sep 11 08:08:55 2024 Last Update Attempt: Wed Sep 11 11:15:23 2024 Result: No Updates If not updating, make sure that the Application Control profile is enabled under any of the firewall policies. If the FortiGuard server cannot update, upload manually the latest application signature database using the below link: Technical Tip : How To Upgrade Application Control Definitions Manually The official FortiGuard Labs resource list for the latest updates in the signature databases: https://www.fortiguard.com/services/appcontrol Related article: Technical Tip: Application Control Signatures are not updated automatically