Fix empty DFP iframes on responsive websites due to illegal repositioning

Today I'd like to share a recent problem we had in a Drupal project where we were using ‎Doubleclick for Publishers (DFP)‎.

We were wondering that from time to time DFP ads were disappearing on some positions.

Moving ads parents containers is the reason

Clickjacking via iFrames vorbeugen durch X-Frame-Options SAMEORIGIN

If you want to prevent browsers from rendering content in an iFrame, for example to disallow embedding your page as iFrame on foreign pages, you can use the X-Frame-Options response header

For example in apache using mod_headers:

Header append X-Frame-Options SAMEORIGIN