dyn.php is a tiny (< 250 LoC) CGI script written in PHP which
provides a simple API to manage changes of dynamic IP addresses and which serves
as a "What's my IP address?" tool as well.
Install the dyn.php to your web server and configure the configuration
variables at the very top to your liking.
Important
Make sure to change PERSISTENCE_FILE and AUTH_PW_HASH!
At the very top of the dyn.php script there are a handful of defines which
serve as configuration options.
PERSISTENCE_FILE- the file which the script uses to store its data. This file should now be readable by the web server.
AUTH_USER- the user name used for authentication to
?out. AUTH_PW_HASH- a PHP
crypt()/password_hash()hashed form of the password used for authentication to?out. DATETIME_FORMAT- the output format for dates in strftime(3) format.
CONSIDER_FRESH_FOR- entries will be marked green if a system was added or its IP has changed in the last N seconds. Set to 0 to disable.
CONSIDER_OFFLINE_AFTER- entries will be marked red if a system did not ping dyn.php for this many seconds. Set to 0 to disable.
dyn.php has two "modes".
returns the current IP address in JSON format (unless ?quiet is used, in which case nothing will be returned).
If ?name is specified, the IP address will be remembered under this name and can be viewed later using ?out.
prints the IP addresses stored by previous ?name updates after authentication.