User-Agent: Googlebot
Allow: /

User-Agent: Googlebot-Mobile
Allow: /

User-Agent: Googlebot-Image
Allow: /

User-Agent: msnbot
Allow: /

User-Agent: msnbot-media
Allow: /

User-agent: Twitterbot
Allow: /

User-agent: Facebot
Allow: /

User-Agent: Alexabot
Allow: /

User-Agent: *
allow: /