Example inadyn.conf in JSON format, using Jansson.

inadyn.json

{
    "syslog": true,
    "period": 600,
    "startup-delay": 30,
    "forced-update": 604800,
    "wildcard": true,
    "bind": "eth0",
    "system": [
        {
            "type":     "[email protected]",
            "username": "example",
            "password": "secret",
            "alias": [  "example.homenet.org" ]
        },
        {
            "type":     "[email protected]",
            "username": "admin",
            "password": "supersecret",
            "alias": [  "example.dyndns.org" ]
        }
    ]
}