If you're using a device with an older kernel where this version does not work, you can move to branch kernel-4.14 and installation steps are the same. but scripts in this branch may be OUTDATED.

download release from github.
install with magisk.
modify the config file at /sdcard/Android/zerotier/network_id.txt and put your 16-character network id in it.
restart and enjoy.

To restart, you can just restart the whole system, or just execute /data/adb/zerotier/restart.sh; An android application to control zerotier (networkid, restart, ...) has been added to the todo list.

Scripts and binaries

all the scripts and binaries are placed in /data/adb/zerotier/ , you can use termux to run them if needed. add_ip_rule.sh is used to make the main route table, which zerotier writes its routes to, available.

Build binaries yourself

The following steps have only been tested in "Termux" with the package manager "apt".

Note that the zerotier binaries are only built for aarch64, you can build it yourself in "Termux".

Download source files from zerotier/ZeroTierOne.

Delete ZT_SSO_SUPPORTED=1 in make-linux.mk for "aarch64" (or your architecture). this will prevent building zeroidc with rust; the author encountered some problems building zeroidc

Install package natpmpc using apt install natpmpc and update your libnpth library using apt install libnpth.

At last run make or multithreaded make -j8.