In most Android mobile network environments the phone will using mobile data or a wifi hotspot. Both of these environments will often prevent users from hosting a server since it is difficult to perform the necessary port forwarding to make packets routable to the service. Onion services solve this problem by using the onion rendezvous protocol . The rendezvous protocol allows an endpoint behind a NAT or firewall to host and advertise services. This type of system is ideal for hosting services on Android since it solves all of the question related to port routing automatically. The only drawback is that it requires users to install a Tor capable browser. This will be less and less of a hurdle as many browsers are integrating Tor capabilities natively , or have announced plans to do so . So… here’s how we set it up. Install UserLAnd for Android For this guide I decided to use UserLAnd as opposed to Termux simply for the ease of use. Termux is ce...