DNS filter on Fortigate

11th February 2020

We had some problems with a website getting incorrectly flaged by the Fortigate DNS filter.

Disabled the DNS filter but still needed to clear the DNS cache to get the site to work again.

Clear the DNS cache on Fortigate with the following command:

diag test app dnsproxy 1

Fortinet says in the Tab Title when DNS is the reason a page is blocked.

Fortigate has a webpage here where you can submit changes to their classifications https://fortiguard.com/faq/wfratingsubmit

Quad9.net has a search box on the main page to test DNS