CDN Domain whitelisting for summary_large_image card



We moved our Wordpress blog images recently to a CDN provider. Since that transition the Twitter cards stopped showing images.

Here is a sample url.

The card validator mentions “* is whitelisted for summary_large_image card”, but our CDN url is

(Sample image url from the article/Twitter card above)

How can we get that the domain “” whitelisted for our Twitter cards?

Thank you!


You’ll need to fix the robots.txt file on your CDN host.

At the moment is is allowing /wp-content/ and disallowing /

Your images are at /blog/wp-content/ so you should allow Twitterbot access to that location.


This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.