Configure Cellular and Wifi Domains
By default, iOS will appropriately prioritize DNS to the expected interface. However, in some cases you may need to inform iOS of the desired target interface.
For example:
- Always send a domain over WiFi, never cellular. This can ensure that local corporate domains are never sent over the cellular network.
- Always send a domain over cellular, never WiFi. This can aid in compatibility issues, such as voicemail domains only functioning over cellular DNS.