Tips to Fix the “DNS Server Not Responding” Error in Windows and macOS (10 Methods) Switch to a Different Browser. Start Your Computer in Safe Mode. Temporarily Disable Your Antivirus Software and Firewall. Disable Secondary Connections. Disable the Windows Peer-to-Peer Feature.
This is an expected behavior where the firewall logs any invalid DNS traffic.
Invalid DNS traffic would be UDP packets on port 53 that are not DNS traffic, packets which are oversized, bad checksum etc or this happens also if the DNS query is not successful returns any other status than NOERROR.
I see you specified the DNS root servers as DNS1, DNS2. I would change that to your ISP's DNS, and a reliable public DNS as secondary DNS (like 188.8.131.52 or 184.108.40.206). Chances are high that the nearest DNS is at your ISP and will respond quickest.
The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.