ProxyAuth for Android is a free-to-use app developed by Silverstone Labs. It provides a simple and efficient solution for handling authentication requests received by proxy servers. With this app, all traffic is tunneled through it, enabling it to handle authentication requests. This way, other apps can connect through it.

One of the most remarkable features of ProxyAuth is its ability to support NTLM, Linux Squid Server, and Basic Plain Authentication over HTTP and HTTPS. Additionally, this app is tested with Linux Squid Server with basic authentication. However, it may have a few bugs relative to different platforms and architectures. The app has not been tested under Domain, but it should be working. Feedback is appreciated.

It is worth noting that access to the internet or other services depends on your proxy server environment. ProxyAuth also supports saving multiple credentials of profiles, and it does not require root access. If you are looking for a reliable proxy authentication app, ProxyAuth for Android is a great choice.