We are configuring some GTM with private IP self address and we use a public IP on the listeners in order to receive plublic dns queries.
We are also using this gtm as a validating resolver cache. The listener is using a private IP as it is only used by internal machines. There is a snat with publics IPs on that listener (so response can be routed back to us).
The problem I see, is that the gtm queries the root dns servers with its private self IP, so it does not work.
Is it possible to use the public snat IP for that ?
Or must we change the self IP to public ?