# facebook.com social network
User-agent: facebookcatalog
User-agent: facebookexternalhit
User-agent: Facebot
# google.com international search engine
User-agent: Googlebot
Disallow: 
User-agent: googlebot-image
Disallow: 
User-agent: googlebot-mobile
Disallow: 
# bing.com international search engine
User-agent: MSNBot
Disallow: 
# yahoo.com international search engine
User-agent: Slurp
Disallow: 
User-agent: *
Disallow: /*blackhole
Disallow: /?blackhole
Disallow: /
Crawl-delay: 30