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How does this work with hosts that are not resolvable outside your own network? If I tell firefox to go to internalsite.mycompany.com - which resolves internall
by dmd 7y ago
How does this work with hosts that are not resolvable outside your own network? If I tell firefox to go to internalsite.mycompany.com - which resolves internally, but not outside our network - how is firefox going to resolve it, if it's not using our DNS servers?
- qmarchi 7y agoCorrect. In order to preserve compatibility, Firefox's implementation has a "fallback" where if it sees that it can't resolve a domain, then it will fail back to using the system-configured DNS provider.
- extra88 7y agoYou can also exclude specific domains but at this point they have to be written in about:config. https://support.mozilla.org/en-US/kb/firefox-dns-over-https#w_excluding-specific-domains https://support.mozilla.org/en-US/kb/firefox-dns-over-https#... It looks like Firefox Policies can be used to enable, disable, or specify the DoH provider but cannot yet specify excluded domains. https://github.com/mozilla/policy-templates https://github.com/mozilla/policy-templates
- colanderman 7y agoI wonder why they don't simply check if the user's resolv.conf is configured to resolve via a private IP address, and not use DoH if that's the case.