=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Date: Sat, 27 Nov 2021 02:16:12 GMT
Server: Apache
Location: https://gtmetrix.com/
Connection: close
Content-Type: text/html; charset=iso-8859-1

HTTP/1.1 200 OK
Date: Sat, 27 Nov 2021 02:16:12 GMT
Server: Apache
Content-Length: 21848
Content-Type: text/html; charset=utf-8
Strict-Transport-Security: max-age=63072000; includeSubDomains; preload
X-Frame-Options: SAMEORIGIN
X-Xss-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Referrer-Policy: same-origin
Report-To: {&quot;max_age&quot;: 604800, &quot;endpoints&quot;: [{&quot;url&quot;: &quot;https://gtmetrix.com/browser-errors-reporting/&quot;}]}
Cross-Origin-Opener-Policy-Report-Only: same-origin
Cross-Origin-Embedder-Policy-Report-Only: require-corp
Connection: close

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


Link is valid.