User-agent: *
Disallow: /SignUp

User-agent: dotbot/1.0
Disallow: / 

user-agent: WebAlta Crawler/2.0
Disallow: /

User-agent: dotbot 
Disallow: / 

User-agent: Vagabondo/4.0Beta
Disallow: / 

User-agent: *
Disallow: /*.axd$