=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: Sucuri/Cloudproxy
Date: Sat, 13 Apr 2019 23:13:05 GMT
Content-Type: text/html; charset=UTF-8
Content-Length: 0
Connection: close
X-Sucuri-ID: 17012
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
X-Pingback: http://serversitters.com/xmlrpc.php
Location: https://serversitters.com/
Cache-Control: max-age=600
Expires: Sat, 13 Apr 2019 23:23:05 GMT
Vary: User-Agent
X-Sucuri-Cache: MISS

HTTP/2 200 
server: nginx
date: Sat, 13 Apr 2019 23:13:05 GMT
content-type: text/html; charset=UTF-8
x-sucuri-id: 17012
x-xss-protection: 1; mode=block
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
content-security-policy: upgrade-insecure-requests;
x-pingback: https://serversitters.com/xmlrpc.php
link: &lt;https://serversitters.com/wp-json/&gt;; rel=&quot;https://api.w.org/&quot;, &lt;https://serversitters.com/&gt;; rel=shortlink
cache-control: max-age=600
expires: Sat, 13 Apr 2019 23:23:06 GMT
vary: Accept-Encoding,User-Agent
x-sucuri-cache: MISS

Request headers
================
HEAD / HTTP/2
Host: serversitters.com
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept: */*
Referer: https://itxdesign.com
Connection: close


Link is valid.