I looked at the server header and seen:

Initiating server query ...
Looking up IP address for domain: adwoff.com
The IP address for the domain is: 209.216.253.27
Connecting to the server on standard HTTP port: 80
[Connected] Requesting the server's default page.
The server returned the following response headers:
HTTP/1.1 200 OK
Date: Mon, 16 Jun 2008 22:15:35 GMT
Server: Apache/2.0.52 (CentOS)
Last-Modified: Thu, 13 Mar 2008 10:14:46 GMT
ETag: "2ee180fe-13f4-d2ac5180"
Accept-Ranges: bytes
Content-Length: 5108
Connection: close
Content-Type: text/html
Query complete


Looks like Linux with a html control pannel.