How to Monitor a server that assigned with Internal IP?

Help
1

I setup librenms server at external data-centre with company assigned public IP.
I want to monitor server A hosted inside my company server-room.
but this ‘in-house’ server A has internal IP e.g. 172.x.x.x
Though this ‘in-house’ server A can ping out to the public E.g. reach the librenms server

I don’t think this is possible via the [Add Device] option but I was wondering if there is a work around?
E.g. Internal server A periodically push/feed info to librenms server instead of librenms polling it
or I need to add 2nd eth1 network adaptor and assign a 172.x.x.x IP to librenms server.

Thank you in advance.

2

Setup VPN or NAT out SNMP to that remote server?

3

Do you mean setup VPN or NAT on librenms server?
Does that mean the librenms server will have 2 assigned IPs?

4

was talked about out on Discord.