=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Server: nginx
Date: Mon, 29 Nov 2021 09:19:51 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Vary: Accept-Encoding
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
Set-Cookie: PHPSESSID=gq95hjh0p58h2mi4fv7bme1gu2; path=/
Strict-Transport-Security: max-age=31536000; preload

Request headers
================
HEAD /about/ HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: mockup.io
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.