User-agent: Nutch
Disallow: /
User-agent: Exabot
Disallow: /
User-agent: dotbot
Disallow: / 
User-agent: Jyxobot
Disallow: /
User-agent: SurveyBot
Disallow: /
User-agent: yetibot
Disallow: /
User-agent: WebmasterCoffee
Disallow: /
User-agent: voyager
Disallow: /