Here's a log of my experience installing Mosquitto server on Ubuntu 14.04. Mostly, I followed the excellent walkthrough on the OwnTracks Broker page, with a few adjustments along the way.
First, the errors/issues:
From my Windows 7 machine, I've consistently been able to connect via SSH (using Putty) to two different Linux servers. A few weeks ago, one of them stopped responding to connection attempts. Putty would just sit there with a black screen and eventually time out. Troubleshooting attempts:
- It wasn't a local outgoing firewall (or Windows 7) problem, because I could still connect to other OpenSSH servers
- It wasn't a problem with the OpenSSH server itself, because I could SSH to one server, and then SSH from there to the 'problem' server.