Hosted IBMi connecting to local server

Hoping someone can help me here. This is more of a networking issue, I think:

We have purchased a new IBMi based software package that requires connecting to a service installed on Windows Server. Our IBMi is hosted offsite and connected to our network via a VPN tunnel with a 172.20 numbering scheme. The Windows Server is local with a 192.168 scheme.

We can ping the local server IP address from the IBMi, but are unable to connect to the Windows service from within the IBM software. My guess is that when we are performing the ping to the 192.168 address, it's finding a device in the hosting site's data center? The ping result comes back split-second.

The only input I've received from our hosting provider is that we should change the IP address of our Windows Server to match the VPN tunnel scheme. But that brings up a whole host of other issues as that's our primary domain server for the local network.

So, I attempted to change the IP address of a local Win10Pro desktop to be in the 172.20 scheme, but I obviously did something wrong as it lost all network connectivity. Had to change it back.

The hosting provider hasn't responded to any of my follow-up questions and the IBMi software vendor doesn't have the networking expertise to help either.

Anyone have any ideas?

Thanks

Bob Cagle
IT Manager
Lynk