Problem with URL Filtering

Hello!! 

After going around in circles, doing many tests and trying various configurations both on the Pi-hole and on the Sophos, it is clear to me that there is something in the firewall that is blocking the domain (and the subdomains) *.githubusercontent.com.
The last test that confirms this is the ping from Sophos itself to the domain, as you can see in the screenshot, this time I do get a response:

As I said, I have done several tests, such as adding the domain as an exception, fine-tuning the web filtering policy, fine-tuning the internet browsing policy, adding the FQDN as an exception, changing the DNS offered by the DHCP... But nothing works, I am quite confused... 

What else could I try?

Kind regards!!

Albert.

Hello!! 

Finally I've resolved the issue:

The culprit was a third-party threat feed, the CiberHost_UK, the domain .githubusercontent.com is categorized as malware:

Kind regards.

Albert

thx for sharing your solution.

I am wondering because I have two sfos instances and networks which also using a pihole setup. On both updates are working without any issues.

Have reported that false-positive to sophos yet?

Hello nd ,

I've only reported this false positive to CyberHost_UK, reporting also to Sophos is a good idea. Thanks for your suggestion!!

Kind regards.

Albert.