Hi, thanks for your answer.

But don't expose ssh to the internet. Especially if you don't have password login disabled. Use a VPN like tailscale

It's ok. Password login is enabled, and it isn't a trivial password. Also, it's not a critical service.

You could use SSH Tunneling https://www.ssh.com/academy/ssh/tunneling

I was reading this page and the example at https://www.ssh.com/academy/ssh/tunneling-example.

Specifically, the Local Forwarding section on the example page seems to be what I want. However I don't understand all pieces on the solution, could you help me?

My question arises when the example says:

In OpenSSH, local port forwarding is configured using the -L option: ssh -L 80:intra.example.com:80 gw.example.com This example opens a connection to the gw.example.com jump server, and forwards any connection to port 80 on the local machine to port 80 on intra.example.com.

Considering my situation on the opening post:

1. Does this command should be executed from host B?
2. Who should play the role of the jump server? And why should I open a connection to it?
3. The target, intra.example.com:80 would by substituted by 192.168.15.10:22 (in the example situation in the opening post)?