Your host, xxxxx.dyndns.biz, has been blocked for abusive updates.

Tired of being blocked? Purchase a DynDNS Pro to increase your abusive updates threshold.

This usually occurs when an update client is misconfigured or is not fully compatible with our services. A proper client should only send an update when an IP address change is detected; if we receive too many unnecessary updates for a host, the host is blocked to prevent flooding.

The most common causes for abuse blocks are:

Client updates at regular intervals: Clients should only send IP address updates when a change is detected, but some are programmed to send updates at scheduled intervals, e.g. every five minutes or every hour.
Client is malfunctioning: Incorrect installation (e.g. cannot write IP to file), incorrect configuration (e.g. installing a Linux client in cron instead of running as a daemon), or physical problems (e.g. power fluctuations for hardware clients) can cause the client to send abusive updates.
Multiple clients: If you install two or more update clients in the same network, such as both a software client and a hardware client, the extra updates will count as abusive.
Please check your update client's logs to determine why the client has been misbehaving. Since you have been blocked more than 10 times for abusive updates, you will need to contact Support to request assistance. Our Support team will be able to identify the problem and help you prevent the host from being blocked again in the future.