Puts WSL on the public internet by running a netsh portproxy through an admin powershell, all within WSL.
This tool was created to help use wsl as a public webserver without having to interface with Windows.
If you use a portproxy to get WSL on the public internet, Windows will erase the headers needed to capture visitor IP. In order to get around this, you need to follow this guide to set WSL2 into bridge mode:
Windows does not have an easy way to make a DNAT, as Get-NetNat only shows SNATs. So, I could either make a reverse proxy server on apache on my Windows host, somehow find a DNAT solution (let me know if you find an easy one), one of a number of files that get bridges to work before MS added official support, and actual bridge support here.
The only thing you need to do after this is portforward your ports on your router pointing towards the new WSL IP. It will be on your internal network and your router will see WSL, so it will all work properly, and you can now log your visitor IPs.
If you run an apache server on port 80 and connect to your public ip, you will time out, as WSL2 runs within its own virtual network that only the local computer can connect to. In order to get around this, you need to run this within an elevated powershell:
netsh interface portproxy add v4tov4 listenport=80 listenaddress=0.0.0.0 connectport=80 connectaddress=wsl_ip
netsh interface portproxy add v4tov4 listenport=443 listenaddress=0.0.0.0 connectport=443 connectaddress=wsl_ipAnd in order to get the wsl_ip, you need to run this within wsl:
ip -4 -j route | grep -o '"prefsrc":"[^"]*' | grep -o '[^"]*$'Originally, the quick solution was to do ip a | grep eth0, find and copy the ip,
make two commands, and call it a day. But the WSL ip changes sometimes, and that
annoyance spawned this script.
It runs an elevated powershell within a process to run the netsh.
$ ./wsl_portproxy.sh -h
Usage: wsl_portproxy [-a <addr>] [-p <port1,port2...>]
eg: wsl_portproxy -p 80,8080,443
eg: wsl_portproxy -a 172.12.34.56 -p 80
eg: wsl_portproxy -a 172.12.34.56
eg: wsl_portproxy
-a IP to portproxy windows to.
The default ip used is the local WSL2 ip outputted by:
$ ip -4 -j route | grep -o '"prefsrc":"[^"]*' | grep -o '[^"]*$'
-p Port(s) to portproxy with
Default ports: 80, 443** with no opts, default usage will automatically open the local wsl_ip on ports 80 and 443
$ ./wsl_portproxy.sh
Windows portproxy started on 0.0.0.0:80 to 172.12.34.56:80
Windows portproxy started on 0.0.0.0:443 to 172.12.34.56:443