How to set up SSH tunel for all (most) internet traffic of Windows 10?

Question

The setup is as follows:

Computer A (behind a firewall with open SSH port 22)

• OS: Windows 10
• Installed Putty

Computer B (outside firewall, full admin rights)

• Raspberry Pi
• OpenSSH installed
• A working SSH account accessible from computer A

How can one re-route all internet traffic (not only browsers but all applications) on computer A though an SSH tunel to computer B. For example, if an application on computer A accesses web-address X on port Y, the request should be automatically SSD-tuneled through port 22 to computer B from which X:Y is then accessed. The same should apply for any back-channel traffic.

Addresses X and ports Y can by any possible, and are not predefined.

Setting up the tunel for specific ports in Putty on computer A has been tried but there seems to be no re-routing happening. How can one "tell" to application to use the SSH-tunel and not try to usual routing?

Answer 1

You need to create an SSH tunnel and use a SOCKS proxy as system-wide settings. Please note that this will work for proxy-aware applications, and there may be some apps that won't be able to work with this setting.

1. Create a SSH profile to your SSH remote server. Then go to Connection -> SSH -> Tunnels and setup a dynamic SSH tunnel as in the image below. Make sure the dynamic port is not used (e.g. use a high port or check using netstat -an, making sure the port is free).

2. Configure system-wide proxy settings to use the SOCKS proxy by setting localhost as the proxy server (or 127.0.0.1) and the dynamic port number you used in the above setting (e.g. 8910 as in the image).