Title: Simulate can_perform_loopback
Last modified: November 26, 2021

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# Simulate can_perform_loopback

 *  [Daniël](https://wordpress.org/support/users/danielbareman/)
 * (@danielbareman)
 * [4 years, 6 months ago](https://wordpress.org/support/topic/simulate-can_perform_loopback/)
 * Hey everyone,
 * We are dealing with WordPress websites not being able to loop back to them selfs:
   cURL error 28: Connection timed out after 10001 milliseconds
 * [https://developer.wordpress.org/reference/classes/wp_site_health/can_perform_loopback/#source](https://developer.wordpress.org/reference/classes/wp_site_health/can_perform_loopback/#source)
 * Since it’s a cURL request, I’m wondering if I can reproduce the exact same things
   that the function of WordPress does, with just php + curl, and set full verbosity
   to be able to better troubleshoot what is happening or what is actually executed.
 * It’s a struggle to troubleshoot it, without fully being able to understand what
   it does.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsimulate-can_perform_loopback%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Moderator [t-p](https://wordpress.org/support/users/t-p/)
 * (@t-p)
 * [4 years, 6 months ago](https://wordpress.org/support/topic/simulate-can_perform_loopback/#post-15107705)
 * Please ask your hosting hosting provider why loopback don’t work on their server.
 * cURL error 28, try reviewing:
    [https://wordpress.org/support/article/common-wordpress-errors/#error-28](https://wordpress.org/support/article/common-wordpress-errors/#error-28)
   [https://www.wpbeginner.com/wp-tutorials/how-to-fix-curl-error-28-connection-timed-out-after-x-milliseconds/](https://www.wpbeginner.com/wp-tutorials/how-to-fix-curl-error-28-connection-timed-out-after-x-milliseconds/)
    -  This reply was modified 4 years, 6 months ago by [t-p](https://wordpress.org/support/users/t-p/).
    -  This reply was modified 4 years, 6 months ago by [t-p](https://wordpress.org/support/users/t-p/).
 *  Thread Starter [Daniël](https://wordpress.org/support/users/danielbareman/)
 * (@danielbareman)
 * [4 years, 6 months ago](https://wordpress.org/support/topic/simulate-can_perform_loopback/#post-15109852)
 * Hello t-p,
 * Thank you for your response, the problem is, that our customers are getting this
   error, I’m a representative of the hosting company asking the community for some
   help / guidance.
 * There are several shackles in the chain, that could somewhere cause this, to 
   pin point / research it, I want to know if it’s just one or a few backends that
   have this issue, or that all backends got the problem.
 * I’m in the process if installing WordPress on a domain on each separate backend,
   login and check the health check, but this is tedious and manual labor.
 * Ideally I would put a php file with the curl request on each backend and loop
   over them all and see which one(s) have this via e.g. bash / python, and save
   it’s full verbose information.
 * Hopefully this helps explain the situation.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Simulate can_perform_loopback’ is closed to new replies.

## Tags

 * [curl](https://wordpress.org/support/topic-tag/curl/)
 * [loopback](https://wordpress.org/support/topic-tag/loopback/)

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 2 replies
 * 2 participants
 * Last reply from: [Daniël](https://wordpress.org/support/users/danielbareman/)
 * Last activity: [4 years, 6 months ago](https://wordpress.org/support/topic/simulate-can_perform_loopback/#post-15109852)
 * Status: not resolved

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