=== Código HTTP : 200 ===

HTTP/1.1 200 OK
Date: Sat, 13 Dec 2014 04:59:45 GMT
Server: Apache/2.2.16 (Debian)
X-Powered-By: PHP/5.3.3-7+squeeze3
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Type: text/html; charset=utf-8
Set-Cookie: catedu_es=31.170.164.23.1418446785401279; path=/; expires=Sun, 14-Dec-14 04:59:45 GMT; domain=.catedu.es
Set-Cookie: PHPSESSID=3cs7ijb9sbjh0ktu74qg11h1a1; path=/
Vary: Accept-Encoding
Connection: close


El enlace es válido.