PLUTO

PLUTO allows you to monitor the status of your WWW site. PLUTO is a Web robot, that is easily configured to monitor the accessibility of any site on the World Wide Web on a randomly periodic basis. It attempts to connect to a given site, sends a HTTP request, inspects the response, and writes the result to a log. PLUTO can be instructed to immediately send an e-mail message if an error occurs or wait until the end of the month to generate a report summarizing the availability of your site.