'Keep Me Posted' is an 'IP Poster' that runs as a service. It periodically checks a machine's IP address and takes action if a change is detected. The action consists of either an email or a file which is uploaded to a static address. Version 3 now adds support for an external router (e.g. Linksys, UMax, NetGear, or SMC Barricade), or can get its address from an external service.