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Fix: All FortiGuard Servers Failed to Respond
It’s usually the DNS server to blame
3 min. read
Published onNovember 2, 2023
published onNovember 2, 2023
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Key notes
Several users who had FortiGate set up and running reported encountering theWeb Filter Service Error: all Fortiguard servers failed to respondissue, wherein most websites were inaccessible, even the established ones. Funnily, for a few, FortiGuard’s official website was blocked, too
The problem usually arises when there’s a change in the DNS server, FortiGate tries to connect only to IPv6 addresses, or if you have poorly set filtering and rating settings.
How do I fixWeb Filter Service Error all fortiguard servers failed to respond?
Before we start with the slightly complex solutions, try these quick ones first:
1. Change the DNS server
Changing the DNS server helps eliminate several network-related issues, includingUnable to connect to FortiGuard servers.
2. Disable anycast
For many users, disabling FortiGuard – anycast worked when content filtering wasn’t optimal, or they came across theFortiGuard webfilter services are not reachableerror.
To do that, use the following CLI (Command Line Interface):
config system fortiguardset fortiguard-anycast disableset protocol udpset port 8888set sdns-server-ip 208.91.112.220end
Once done, the websites should open properly. This method worked in 4 out of 5 instances of the error we came across.
3. Turn on Allow websites when a rating error occurs
4. Configure the update server location
5. Contact Fortinet support
If nothing else works, it’s best that youcontact Fortinet supportand ask for a resolution because it’s most likely a setup-specific problem.
Apply the changes they recommend, or wait for an update to get things up and running.
These are all the ways you can fix theWeb Filter Service Error all FortiGuard servers failed to respondissue in no time. Remember, based on our research, it generally turned out to be some misconfiguration at the user’s end. So verify that before you contact the support team.
A few even reported issues with the VPN, whereFortinet VPN locks out after 1 failed attempt, and here, too, the command line interface comes to the rescue!
For any queries or to share more solutions with us, drop a comment below.
More about the topics:network error,website
Kazim Ali Alvi
Windows Hardware Expert
Kazim has always been fond of technology, be it scrolling through the settings on his iPhone, Android device, or Windows PC. He’s specialized in hardware devices, always ready to remove a screw or two to find out the real cause of a problem.
Long-time Windows user, Kazim is ready to provide a solution for your every software & hardware error on Windows 11, Windows 10 and any previous iteration. He’s also one of our experts in Networking & Security.
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Kazim Ali Alvi
Windows Hardware Expert
Kazim is specialized in hardware devices, always ready to remove a screw or two to find out the real cause of a problem.
