FortiGuard Servers are not reachable

Update – 10. November 2021: It seems that the server «45.75.200.89» is not in use anymore – it is «not reachable» at the moment. Please use «194.69.172.53» instead.

Blogpost – 3. November 2020:

From time to time customers noticed that the Fortigate cannot reach the Fortiguard Servers anymore.

This is displayed in the Dashboard or users are complaining that the Webfilter or DNS Filter Service is not working anymore.

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Error message: «Unable to load FortiGuard DDNS server list»

For some reasons Fortigates are are not able to load the FortiGuard DDNS server list. Therefore you are not able to configure DynDNS on your Fortigate anymore. In the WebUI you will see following error message under Network > DNS > FortiGuard DDNS and you are not able to list any server with the drop-down menu.

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FortiWeb v6.4.0 and Let’s Encrypt

FortiWeb v6.4 starts to support the integration with Let’s Encrypt. This allows you to automatically generate server certificates alleviating the need to upload private certificates.

The administration guide gives you some information on how to request those Let’s Encrypt certificates but in our opinion the configuration guidelines are not sufficient.
So we tried to give some more information on how to configure FortiWeb to obtain a server certificate from Let’s encrypt and how to use them in the server policy.

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FortiGate PPPoE inside a VLAN

Some providers (like init7.ch which already uses the Swisscom XGS-PON) do encapsulate their PPPoE traffic into a VLAN Tag (802.1Q or Q-Tagged). The reason for this is, that in the majority of the cases the provider is using a layer 2 network (last mile) of another provider, which uses VLAN tagging to differentiate the traffic to different service providers.

The configuration of the FortiGate is not too complicated in those cases. It is even possible to make the whole configuration directly off the WebGUI.

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