There is a site with the domain test.ru, there is a subdomain one.test.ru. iframe connection, at 'X-Frame-Options: SAMEORIGIN'?

Question

PHP

There is a site with a subdomain one.test.ru, there is a domain test.ru
I do not want the site to be launched from another domain, but there
was only access to the domain and subdomains.

If put on one.test.ru - 'X-Frame-Options: SAMEORIGIN' Closes
all access except one.test.ru.
Consequently, access through test.ru will be limited.
How to be?

Answer 1

X-Frame-Options: ALLOW-FROM test.ru
https://developer.mozilla.org/en-US/docs/Web/HTTP/...