Comment by tssva

Although the article is confused regarding dynamic IP addresses your solution of identifying the endpoint using a DNS name is also not a complete solution when using Wireguard. The Wireguard tool, wg, resolves the DNS name and then sets the ip address for the endpoint which the wireguard protocol implementation then uses. Since the wireguard protocol implementation doesn't do any DNS resolution if the endpoint address changes even if the DNS record is updated wireguard will never know. Instead another tool needs to check the DNS record of the endpoint periodically either at some fixed interval and/or based upon the TTL of the DNS record. If the record changes it then needs to update the configuration of the wireguard protocol implementation.