Here's our logs in case it helps anyone:
> hera ra | time="2020-04-15T17:08:09Z" level=error msg="Unable to dial edge" error="DialContext error: dial tcp 198.41.200.233:7844: i/o timeout"
> hera | time="2020-04-15T17:08:09Z" level=info msg="Retrying in 1s seconds"
hera | time="2020-04-15T17:08:09Z" level=error msg="Unable to dial edge" error="Handshake with edge error: read tcp 172.18.0.2:36016->198.41.192.227:7844: i/o timeout"
> hera | time="2020-04-15T17:08:09Z" level=info msg="Retrying in 1s seconds"
hera | time="2020-04-15T17:08:11Z" level=error msg="Unable to dial edge" error="Handshake with edge error: read tcp 172.18.0.2:44626->198.41.192.7:7844: i/o timeout"
> hera | time="2020-04-15T17:08:11Z" level=info msg="Retrying in 4s seconds"
> hera | time="2020-04-15T17:08:13Z" level=info msg="Connected to EWR"
> hera | time="2020-04-15T17:08:13Z" level=error msg="Register tunnel error from server side" connectionID=0 error="Server error: Reached maximum retry 5: dial tcp 198.41.248.96:9100: connect: connection timed out"
> hera | time="2020-04-15T17:08:13Z" level=warning msg="Tunnel disconnected due to error" error="Server error: Reached maximum retry 5: dial tcp 198.41.248.96:9100: connect: connection timed out"
> hera | time="2020-04-15T17:08:19Z" level=error msg="Unable to dial edge" error="Handshake with edge error: read tcp 172.18.0.2:51974->198.41.192.107:7844: i/o timeout"