I'm baffled. Host file is configured. I can ping by IP and hostname of brain. I can list topics from remote. It all presents like one way connections and as you can see connection refused below. GCS on remote connects without issue.
Beginning tests of your ROS graph. These may take awhile...
... done analyzing graph
running graph rules...
ERROR: connection refused to [http://erle-brain-2:42085/]
... done running graph rules
Online checks summary:
Found 1 warning(s).
Warnings are things that may be just fine, but are sometimes at fault
WARNING The following node subscriptions are unconnected: