Add a DRV from internet to Milestone Xprotect

I have some DVRs ( hikvison, Dahua, Panasonic,.. ) so I want to add all of them to Milestone Xprotect System. But when I openned Recording servers and search hardware by IP, It’s cannot detect device from internet ( via IP/ domain ). Please tell me how can I do that. Many thank!

As this is not related to software development with the MIP SDK, which is the focus of this forum, please ask again in the support community, you should get better help from the partners using the support community.

https://force.milestonesys.com/support/MccSupportCommunity