I’ve set up a Whisper node on a Digital Ocean cloud server just to have a node available for testing and experimenting that will spread any whisper messages to all other nodes that it is aware of. It’s running on port 30380 at 184.108.40.206
An easy way to check to see if it is running is to use wnode which is a stand-alone whisper command-line tool that is installed with Geth.
Start it by running
wnode -boot=enode://6920356a8d998752bd0d269c95c21aaf0b87357a5dc36cbd1c648d09e47119bc5[email protected]220.127.116.11:30380
If the node on the server is running, wnode will respond with “Connected to peer”:
my public key: 0x04.... enode://.... Whisper node started Connected to peer. Please enter the password for symmetric encryption:
If you run copies of this using the same password, it will set up a topic based on the password and the two machines can exchange messages.
It’s also possible to setup Geth to connect to this server which makes it easier to use the whisper-chat-example. I’ll post the Geth instructions shortly.