Blocking iframe because it set 'X-Frame-Options' to 'DENY'.

I uploaded a project on the php server in my droplet which has both node and php server block on nginx. But when i opened it in the browser it isnt working because it works with i frames and in the console i see

Refused to display ‘myiframe’ in a frame because it set ‘X-Frame-Options’ to ‘DENY’.

And also Uncaught SecurityError: Failed to read the ‘contentDocument’ property from ‘HTMLIFrameElement’: Sandbox access violation: Blocked a frame at “” from accessing a frame at “null”. The frame being accessed is sandboxed and lacks the “allow-same-origin” flag.

What’s the most secure way to deal with those headers on nginx and php?

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@tamburrinipietro89 Change it from DENY to SAMEORIGIN. That keeps a lot of the security, while it should make your app work.

I followed the same and changed in the ssl-params.conf but nothing seems to be changed.

I got this error on my Moodle site after installing the self-signed SSL certificate on my ubuntu 18.04 and 16.04 with apache2 web server installed on it. First, go to this location on your ubuntu server /etc/apache2/conf-available and open the file ssl-params.conf , which you must have created for installing an SSL certificate. Make this Change in the file from DENY to SMAEORIGIN Header always set X-Frame-Options SAMEORIGIN This worked for me.