=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Location: http://www.sketchup.com/
Content-Type: text/html; charset=UTF-8
X-Content-Type-Options: nosniff
Date: Mon, 29 Nov 2021 22:18:06 GMT
Expires: Mon, 29 Nov 2021 22:48:06 GMT
Cache-Control: public, max-age=1800
Server: sffe
Content-Length: 221
X-XSS-Protection: 0
Connection: close

HTTP/1.1 301 Moved Permanently
Date: Mon, 29 Nov 2021 22:18:06 GMT
Content-Type: text/html; charset=iso-8859-1
Connection: close
Age: 372410
Cache-Control: max-age=1209600
Expires: Thu, 09 Dec 2021 14:51:16 GMT
Location: https://www.sketchup.com/
Vary: X-Geo-Country
Via: varnish
X-Cache: HIT
X-Cache-Hits: 93
X-Content-Type-Options: nosniff
X-Geo-Country: JP
X-Request-ID: v-242a95e0-4dff-11ec-9933-bb7b54177f1d
CF-Cache-Status: DYNAMIC
Server: cloudflare
CF-RAY: 6b5f35bdee8c80f6-NRT

HTTP/1.1 200 OK
Date: Mon, 29 Nov 2021 22:18:07 GMT
Content-Type: text/html; charset=UTF-8
Connection: close
Age: 5490
Cache-Control: max-age=21600, public
Content-language: en
Expires: Sun, 19 Nov 1978 05:00:00 GMT
Last-Modified: Mon, 29 Nov 2021 16:45:59 GMT
Link: &lt;https://www.sketchup.com/&gt;; rel=&quot;canonical&quot;, &lt;https://www.sketchup.com/&gt;; rel=&quot;shortlink&quot;
Link: &lt;https://www.sketchup.com/page/homepage&gt;; rel=&quot;revision&quot;
Vary: X-Geo-Country,Accept-Encoding
Via: varnish
X-AH-Environment: prod
X-Cache: HIT
X-Cache-Hits: 200
X-Content-Type-Options: nosniff
X-Drupal-Cache: HIT
X-Drupal-Dynamic-Cache: MISS
X-Frame-Options: ALLOW-FROM https://edu.sketchup.com/
X-Generator: Drupal 8 (https://www.drupal.org)
X-Geo-Country: JP
X-Request-ID: v-71fd6a0a-5155-11ec-8543-23c4c0d03ef2
X-UA-Compatible: IE=edge
CF-Cache-Status: DYNAMIC
Expect-CT: max-age=604800, report-uri=&quot;https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct&quot;
Server: cloudflare
CF-RAY: 6b5f35c1a850347b-NRT

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


Link is valid.