Simple Portforward over libp2p (supports HTTP/HTTPS tunneling)

This example is extension over the original libp2p http-proxy sample to support HTTP/HTTPS tunneling over internet:

This program tunnels HTTP/HTTPS traffic over libp2p between two machines. First machine is the sharer to which the HTTP/HTTPS traffic is sent from second machine. First is called as local & second one as the remote here. Local machine will acts as proxy server to the remote machine. Using this program, you can access your home HTTP servers from a remote machine. You can also access internet using your hosted VPS server.

Build

From the directory run the following:

> go build

Usage

First run the program as follows to the machine where you need to run the proxy server (first machine). You may need to allow udp port 12007 in (UFW) firewall to make this peer reachable over internet.

> ./portforward
This host proxy server accessible over internet using peer ID
 <first-machine-peer-id>

Then run the program in second machine which will need to use the proxy server in above program.

> .\portforward.exe -d <first-machine-peer-id-reacable-over internet>
Change Browser proxy setting to 127.0.0.1: 8080

Now you can see the proxy setting of your browser to 127.0.0.1:8080. All the requests will be sent to first machine & it will send back the response.

Security

Above steps will make the proxy server exposed to the p2p network. To allow the proxy server to be accessed by only known peers. You can add the second machine peer id to the accepted peer list. Here is the command to be run in first machine to accept only from selected peers:

> ./portforward -a <second-machine-peer-id>
This host proxy server accessible over internet using peer ID
 <first-machine-peer-id>

Portforwarding for any network apps

This application enables port forwarding for local socket applications to remote machines, functioning similarly to SSH port forwarding. However, instead of using SSH, it establishes connections over a secure channel provided by libp2p. Just replace the local and remote ports matching to your application.