I am using Sophos Firewall SFOS 20.0.0 GA-Build222.
How do I setup DNS over TLS (with Cloudflare)? I can't find any instructions on the Sophos help pages.
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Important note about SSL VPN compatibility for 20.0 MR1 with EoL SFOS versions and UTM9 OS. Learn more in the release notes.
It's on their to-do list. Sophos has their own DNS service which uses standard IP addresses. They need to get DNS-over-TLS support in the firewall, soon, before customers get angry.
But now I suppose the secure DNS that's built into Windows and in most browsers will have to do for now.