I have the following setup:

1. GKE - Running many pods, annotated with External DNS endpoints.
2. External DNS running, creating DNS addresses in Cloud DNS.
3. Cloud DNS managed zone, with addresses automatically upserted from GKE.

I don't want to expose these dns addresses to the internet, as this is a testing cluster, but i'd like to open it to, set's say, my offices ip, address.

I'm not sure how/where to even start with this in GCP, I'm sure there's a product name for this that I'm just missing. :/

Cheers, Ben