Azure aware plugin

Hi,

We have requirement of  sending data to azure service bus queue from CRM on premise. We are planning to write azure aware plugin for this. But we don't have internet connection on CRM server. Hence my questions are:

1. Is it mandatory to have internet connection for azure aware plugin to execute ?

2. How will I register this plugin ?

I followed this https://msdn.microsoft.com/en-us/library/gg328194.aspx , but requirement of internet connection is not mentioned anywhere and hence I am confused.

Thanks in advance.

Regards,

Nirmal