tinc is a Virtual Private Network (VPN) daemon that uses tunneling and encryption to create a secure private network between hosts on the Internet.
To use Tinc VPN Client Add-on, you should set up tinc server first.
The second step is to generate tinc keys, eg. tincd -n tinc0 -K4096
The third step is to convert keys (public and private) to base64 format, eg. cat /etc/tinc/rsa_key.priv | base64 -w 0
The fourth step is to install Tinc VPN Client Add-on and configure it before starting.
See the DOCS.md for further details.