This readme should help you with tailscale client setup.
[!NOTE] By default this package will use nftables. If you wish to use iptables, the config file
/etc/config/tailscale
can be modfied, changing the linefw_mode 'nftables'
tofw_mode 'iptables'
. You can then run/etc/init.d/tailscale restart
to restart tailscale using your chosen method
First, enable and run daemon
/etc/init.d/tailscale enable
/etc/init.d/tailscale start
Then you should use tailscale utility to get a login link for your device.
Run command and finish device registration with the given URL.
tailscale up
See the OpenWrt wiki for more detailed setup instructions