How to connect two computers to one local network via mobile communication?

Question

Network administration

Computers (Linux RHEL7) of the same local network are located in different places, and are connected to the Internet via mobile communication (Wifi phone).
How can I establish a connection between these two computers to transfer files via ssh?

I tried a GRE tunnel connection, it would be ideal, but apparently GRE does not work with mobile phones :-(

Answer 1

Set up vpn tunnel.

Answer 2

VPN, of course. strongswan/openvpn - anything goes up on linux...

Answer 3

VPn
try openVPN, should crawl everywhere
GRE - Yes, often blocked by mobile phones. and l2tp too

Answer 4

Zero Tier

Answer 5

Thanks a lot for the replies. I will try with WireGuard. I did not find how ZeroTier is installed.
I installed WireGuard only on RHEL7.8, lower versions conflict.
Haven't been able to try yet