I have a Fortigate 201E that has been logging DNS responses when they are denied for some reason. OS was upgraded to 6.4.2 on 10/25/2020. Just recently quit properly logging.
Typically the log was hit due to a restricted destination such as social media. Filtering still operates properly, just no log entry when a restricted site is accessed.
If I enable all DNS logging, then all responses, included those denied, are properly logged.
Also, when a domain is restricted, previously you would get a nice screen indicating that the Fortigate is what is blocking the request. Now there is only text and the graphics provided by url.fortinet.net are missing. When I try to traceroute to url.fortinet.net, I cannot get to the site.
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