Another post to save Future Howard the trouble of trying to remember how to fix a problem: when the DNS server in the USG-PRO has cached an old or invalid IP for a host. To verify:
- SSH to the USG-PRO itself (not the Cloud Key/Controller).
- To see the list of IPs it has stored, with the incorrect entry:
- To edit (elevated) and remove the offending line
sudo vi /etc/hosts
- And to ensure the DNS service forgets the incorrect value:
clear dns forwarding cache
You’re welcome, Future Howard.