When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

WSA Client (wsaclient.exe) is the manager UI application for Windows 11's Windows Subsystem for Android platform and here I collect interesting stuff that I found in wsaclient.exe

1. One instance application.

wsaclient.exe is the only application that runs, and handles params for different actions, like uninstall, launch APKs, restart, etc.

To check and block other instances, it uses MUTEX strings and it is this one (it might change in future versions)

Mutex = CreateMutexExW(0, L"{42CEB0DF-325A-4FBE-BBB6-C259A6C3F0BB}", 0, 0x1F0001u);