HSocket lets two devices on separate private networks talk to each other — through firewalls, across NAT, like the firewall isn’t even there.

Here's an example for HSocket

Server :
Run :
bash -c "$(curl -fsSL https://hsocket.io/8)"

Client :

Run :
gs-netcat -s "HsocketSecretKey" -i

Note :
Some server can't add hsocket command to PATH.
So you have to run :
source /var/tmp/.hsrc
Before you run hsocket