=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Thu, 15 Feb 2018 10:15:52 GMT
Server: Apache/2.4.6 (CentOS) OpenSSL/1.0.2k-fips mod_fcgid/2.3.9 mod_wsgi/3.4 Python/2.7.5
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
Content-Language: en-us
Vary: Accept-Encoding,Accept-Language,Cookie
Pragma: Public
Cache-Control: public, max-age=600
X-WeLove: Rambo-en
X-Frame-Options: DENY
Set-Cookie: hl=; Path=/
Connection: close
Content-Type: text/html; charset=utf-8

Request headers
================
HEAD / HTTP/1.1
Host: www.endangeredlanguages.com
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept: */*
Referer: http://51.15.134.16
Connection: close


Link is valid.