Synthetic monitoring secrets - proxy URL changes

During the secrets migration in https://status.grafana.com/incidents/47d1q4sphrmj, secrets proxy URLs for some customers updated in the following regions: prod-us-central-0, prod-us-east-0, and prod-eu-west-2. This was an unexpected breaking change affecting a subset of customers. This will specifically affect customers who are using secrets on private probes behind a firewall. We are investigating. If your private probes are impacted, we ask you to update firewall rules for the secrets proxy to allow outbound connections to the updated hosts: gsm-proxy-prod-eu-west-2.grafana.net -> gsm-proxy-prod-eu-west-4.grafana.net gsm-proxy-prod-us-central-0.grafana.net -> gsm-proxy-prod-us-central-4.grafana.net gsm-proxy-prod-us-east-0.grafana.net -> gsm-proxy-prod-us-east-2.grafana.net Note that this URL change affects only a small subset of customers, the majority of customers will not need to update firewall rules. For affected customers, private probes will show the following error in probe logs, for example: Error during test execution: failed to get secret: Get "https://gsm-proxy-prod-us-east-2.grafana.net/api/v1/secrets/.../decrypt": Forbidden undefined