HTTP::header insert "X-FRAME-OPTIONS" “(DENY || SAMEORIGIN)”
I assume it's in the login .php but i'm not sure. Anyone know?
Header always append X-Frame-Options SAMEORIGIN
That will add it to the header in all pages rendered through you Apache server (according to http://www.webmasterworld.com/webmaster/4022867.htm... ).
I haven't tested it myself though...