Masking

"masking" is essentially an iframe and since iframes shouldn't really be used, we recommend editing your domains existing CNAME and ARECORD instead of adding a masked FWD or redirect. 

These settings are usually in the same area of your domain registers admin panel.

The related article below explains a couple of ways how to edit your domains CNAME/ARECORD.

If you need help with this please contact us.