User-agent: *
Disallow: /

User-Agent: FacebookBot
Allow: /
Disallow: /nocrawl

User-agent: facebookexternalhit
Allow: /
Disallow: /nocrawl

User-agent: facebookexternalhit/1.1
Allow: /
Disallow: /nocrawl

User-agent: facebookexternalhit/1.0
Allow: /
Disallow: /nocrawl