To connect from another pc you need to add the address with you access the hub externally.
In QMC go to Virtual Proxies --> pick the default one --> Check "Advanced" from the right side menu --> After this you will see "Websocket origin white list" --> Press "Add new value" --> enter the external address/ip (in your case will be "imqlikaz6.cloudapp.net") and hit Apply. After the qmc is restarted (automatic) you will be able to access it from outside.
If running Qlik Sense on Windows Azure, see this post for some common issues and how to address them, http://community.qlik.com/message/650448#650448
Hope this will help you out with your connection issue.