You use a name by default, and if you want to bypass resolution with a system DNS, you hardcode it's IP alongside the name. For example, in firefox: network.tr

You use a name by default, and if you want to bypass resolution with a system DNS, you hardcode it's IP alongside the name. For example, in firefox: network.trr.bootstrapAddress - (default: none) by setting this field to the IP address of the host name used in "network.trr.uri", you can bypass using the system native resolver for it. This avoids that initial (native) name resolve for the host name mentioned in the network.trr.uri pref. https://daniel.haxx.se/blog/2018/06/03/inside-firefoxs-doh-engine/ https://daniel.haxx.se/blog/2018/06/03/inside-firefoxs-doh-e...