this is just my way of understanding this,

Source: Miuri - THM.

Local port forwarding with Chisel:


assuming you want to access your computer at home from the workplace, but at work, the RDP port 3389 outbound connection is blocked by a firewall.

So we will open another port on the computer at work and pass the RDP port(3389) info to the newly opened port and since the firewall only blocking 3389, we can use any other port to establish a connection with port 3389 on our laptop at home.

Reverse(Remote) Port Forwarding with Chisel.