Suddenly all sites are being redirected to different url

Hi,

I think some sort of attack did this, suddenly my all sites, even control panel are redirecting to another site, I am not sure who did this and how, but i am unable to find any redirects in virtual host files, htaccess etc.

All of the sites are behaving the same way.  Some of the details are below.

Panel Domain: server2.afterdoor.com
Ip: 23.227.163.211
Ubuntu 14.04

Some of the hosted websites

afterdoor.com
mivapps.com

Everything is being redirected to another site.


Please help me out in this issue it's kind of urgent.

Thanks