I see two plans here depending on what you have access to.

If you can get an static IP at the data center you would need another PC or router and switch to bridge between you can the miners. You could set up and VPN on the router you could connect to and have access to the network behind them.

If your miners just get a private IP and you don't get the ability to set up anything else , if you had a static IP or at least something you could use a dynamic DNS on the outside you could set the miners to use say OpenVPN and have it start, each miner open a VPN to the outside world where you could connect to it as well.

And you could combined them if you could add a switch and router but don't get a outside IP then you can have the router build a VPN to an outside device and go from there.

Maybe this helps some, kind done a little of both.