In general, HipChat Data Center / HipChat Server addons require a two way traffic to communicate with the server which is hosting the addon over the internet. All the basic requirements to ensure that the addon installation is successful is listed in the Troubleshooting Failed Integration Installations KB.
We would suggest your customer to consider the usage of proxy to allow outbound and inbound connections from the listed URLs as well as a valid CA signed SSL certificate.
We do not have a method to self host the addons locally on within the closed, offline, non-internet environment for now.
Hope that helps to clarify the question that you have on this. Thanks.
...from the beginning. We have built up a lot of content in HipChat, with it being a core tool in our distributed company model. While it is true that we didn’t need to move to Slack immediately, we felt it...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs