How to let facebook read a url that is IP restricted

Question

I have a site that has two versions, for one country A and for all of the rest, and is restricted by IP,

The thing is that from country A, if they share a URL in facebook (for example); when facebook tries to scan for title, description and image it fails (as actually should),

Is there a way to detect that is facebook/twitter/google IP and let them read it? (i understand that if the link is clicked outside country A or facebook it will fail)

Answer 1

There's some info on the individual websites:

• For Facebook Crawler address info, have a look at https://developers.facebook.com/docs/opengraph/howtos/maximizing-distribution-media-content#crawl

• For Twitter, you can have a look here: https://dev.twitter.com/docs/cards/troubleshooting#Card_Validator

• For Google, have a look here: https://support.google.com/webmasters/answer/80553?hl=en