How to prevent certain parameters from being indexed?

Question

robots.txt

Due to authorization through social networks, pages of the form
/?page=25&hauth_start=Vkontakte&hauth_time= numbers here
/?page=27&hauth_start=Vkontakte&hauth_time= numbers here
/?page=28&hauth_start=Vkontakte&hauth_time= numbers here
or
/blog/7000&hauth_start=Vkontakte&hauth_time= numbers here
What to write in robots so that pages are indexed only like this
/?page=27
/?page=28
/blog/7000
And all these postscripts &hauth_ ... delete

Answer 1

User-Agent: *
Allow: /?page=27
Allow: /?page=28
Allow: /blog/7000
Disallow: *hauth_*