In order to protect our customers privacy, copyright and the performance of our websites, we have a number of automatic and manua systems that actively monitor robots, spiders and crawlers accessing websites that we host, and block those that don't comply with a few common sense rules:

In general, all webcrawlers, robots and spiders will be blocked unless they:

1. Follow the robots exclusion standard
2. Properly identify themselves in their user-agent.  Robots that misidentify themselves with a web-browser user agent string (eg ""Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1") or no user agent string at all are generally assumed to be malicious spiders and blocked
3. Don't attempt to submit forms, crack passwords, engage in web application attacks or display an access pattern consistent with known malicous tools
4. Don't cause undue load to the website, eg by accessing pages more than twice a second