- Make a private key for the new interface (you will have to use the command line - see: https://www.wireguard.com/quickstart/)
- make a private key for your peer
- decide on numbering for the network
- add new private key
- create peer by adding it's public key
- open the port on firewall for WG interface to receive inbound UDP
- Add to a firewall zone
https://forum.openwrt.org/search?q=wireguard
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