Quick hacks for updating dynamic DNS via PHP scripts.
Both scripts:
- Obtain the IPv4 address from the HTTP environment variable
REMOTE_ADDRso you don't need to know your own IPv4 address. - Only perform an update if the IP address has changed.
The first hack just performs a local nsupdate(1) using a BIND key stored locally. It also will update an IPv6 record but it expects that to be passed in via the query (e.g. nsupdate.php?v6=::1).
It's a lot easier to just use CloudFlare's free dynamic DNS service. This hack just performs an IPv4 update to CloudFlare so you don't need your own authoritative BIND server.
Code released under the MIT license.