Caddy plugin to match a request's client IP against A and AAAA DNS records of a host name (analogously to remote_ip). Can be useful to restrict route access to a client, that uses dynamic DNS. Uses the host machine's local DNS resolver (uses LookupIP internally).

remote_host [forwarded] [nocache] <hosts...>

Accepts valid host names. If forwarded is given as an argument, then the first IP in the X-Forwarded-For request header, if present, will be preferred as the reference IP, rather than the immediate peer's IP, which is the default. If nocache is given as an argument, this module will not cache DNS responses and instead resolve the given hosts' for every request. By default, responses are cached for 60 seconds, regardless of the DNS record's time-to-live (TTL).

Multiple remote_host matchers will be OR'ed together.

Match requests from a client, whose IPv4 or IPv6 address is the same as what ddns.example.org resolves to.

remote_host ddns.example.org

Apache 2.0