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https://polimi.it

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
77
GRADE
C
FIX
1
REVIEW
5
PASS
3
INFO
0
Probed from Singapore, Singapore
301 Moved Permanently
Checks
9
3 PASS 5 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

B
Redirect Chain
1 redirect(s), 1514 ms total
REVIEW
1 redirect(s), 1514 ms total
Info::
Single redirect
Got: https://polimi.it → https://www.polimi.it/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 1514 ms total
Got: 1514 ms

https://polimi.it

642 ms · HTTP/1.1

301

https://www.polimi.it/

872 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://polimi.it301642 msHTTP/1.1nginx
2https://www.polimi.it/200872 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

C
Crawlability
Action
robots.txt present, sitemap with 0 URLs
REVIEW
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 10240 bytes
Info::
sitemap.xml is present
Warning::
sitemap.xml contains invalid XML
Search engines may not be able to parse the sitemap. Fix XML validation errors.
Warning::
sitemap.xml is empty — no URLs found
An empty sitemap provides no value. Add <url> entries for your pages.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.

Learn more ▾

Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.

Source: sitemaps.org / Google Search Central

An empty sitemap provides no value. Add <url> entries for your pages.

Why this matters

An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.

Learn more ▾

Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.

Source: Google Search Central / sitemaps.org

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 10240 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed
<!DOCTYPE html>
<html lang="it-IT">
<head>
    <meta charset="utf-8">

<!-- 
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<link rel="icon" href="/_assets/4b51f00386267395f41e0940abbcd656/Icons/favicon.ico" type="image/vnd.microsoft.icon">
<title>Politecnico di Milano - polimi</title>
<meta http-equiv="x-ua-compatible" content="IE=edge">
<meta name="description" content="Politecnico di Milano, dal 1863, il più grande ateneo scientifico-tecnologico italiano, tra rigore scientifico e creatività">
<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
<meta name="robots" content="index,follow">
<meta name="generator" content="Politecnico di Milano">
<meta name="keywords" content="bovisa polimi,bovisa politecnico,milano bovisa politecnico,polimi,politecnico,politecnico bovisa milano,politecnico di milano,politecnico di milano campus bovisa,politecnico milano,politecnico milano indirizzo">
<meta property="og:image" content="https://www.polimi.it/fileadmin/asset/logo/polimi_logo.jpeg">
<meta property="og:image:url" content="https://www.polimi.it/fileadmin/asset/logo/polimi_logo.jpeg">
<meta property="og:image:width" content="200">
<meta property="og:image:height" content="200">
<meta property="og:image:alt" content="Politecnico di Milano">
<meta name="twitter:card" content="summary">
<meta name="mobile-web-app-capable" content="no">
<meta name="google" content="notranslate">


<link rel="stylesheet" href="/typo3temp/assets/css/e7e212200e72edb6153da3c9aedf7517.css?1774719989" media="all">
<link rel="stylesheet" href="/_assets/95f1fea155c1725894ea138b1edbb31d/Scss/corsi.css?1775043311" media="all">
<link rel="stylesheet" href="/typo3temp/assets/bootstrappackage/css/theme-8ec6393bb66a2620517b0c161e7037628e44b375a05b23dd75a1ab4b0311a8a2.css?1774626428" media="all">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.2/dist/css/bootstrap.min.css" media="all" integrity="sha384-T3c6CoIi6uLrA9TneNEoa7RxnatzjcDSCmG1MXxSR1GAsXEV/Dwwykc2MPK8M2HN" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.css" media="all" integrity="sha384-gAPqlBuTCdtVcYt9ocMOYWrnBZ4XSL6q+4eXqwNycOr4iFczhNKtnYhF3NEXJM51" crossorigin="anonymous">
<link rel="stylesheet" href="/_assets/4b51f00386267395f41e0940abbcd656/Css/polimi.css?1775796139" media="all">
<link rel="stylesheet" href="https://unicons.iconscout.com/release/v4.0.8/css/line.css" media="all" integrity="sha384-2mD18YQDRE2gaMLgbA4j3ZoBRBOBtavcut3Cmbu/wEzjyRUaazYR4bXTTgsoz5gU" crossorigin="anonymous">
<link rel="stylesheet" href="/_assets/f34691673face4b5c642d176b42916a9/Stylesheet/style.css?1765201540" media="all">
<link href="/_assets/f6ef6adaf5c92bf687a31a3adbcb0f7b/Css/news-basic.css?1763667245" rel="stylesheet" >




<script>
        document.addEventListener('DOMContentLoaded', function() {
            const autoSubmitSelects = document.querySelectorAll('.auto-submit');
            autoSubmitSelects.forEach(function(select) {
                select.addEventListener('change', function() {
                    this.closest('form').submit();
                });
            });
        });
    </script>
<script>
			const storageName = 'klaro';
				const translatedButtonTextCookieSettings = 'Personalizza le impostazioni sulla privacy';
				const cookieSettingsImgPathDefault = '/_assets/f34691673face4b5c642d176b42916a9/Icons/icon_cookie_settings.svg';
				const cookieSettingsImgPathHover = '/_assets/f34691673face4b5c642d176b42916a9/Icons/icon_cookie_settings-hover.svg';
				const cookieIconPermanentlyAvailable = '0';
				const cookieExpiresAfterDays = 365;
				let allServiceSettings = [];
				let consenTypeObj = {};
				let serviceSetting = {};
				let serviceName = {};
				let serviceIsTypeOfConsentMode = false;
		</script>

<script>
				// Define dataLayer and the gtag function.
					window.dataLayer = window.dataLayer || [];
					function gtag(){dataLayer.push(arguments);}

					// Set default consent to 'denied'
					gtag('consent', 'default', {
						'ad_storage': 'denied',
						'analytics_storage': 'denied',
						'ad_user_data': 'denied',
						'ad_personalization': 'denied',
						'functionality_storage': 'denied',
						'personalization_storage': 'denied',
						'security_storage': 'granted',
						'wait_for_update': 500
					});
					//Enable ads_data_redaction by default
					gtag('set', 'ads_data_redaction', true);
			</script>
		
			
			
				<script>
					dataLayer.push({'gtm.start': new Date().getTime(), 'event': 'gtm.js'});
				</script>
				<script type="opt-in" data-type="text/javascript" data-name="google-tagmanager-12">
					// Load Tag Manager script.
					var gtmScript = document.createElement('script');
					gtmScript.async = true;
					gtmScript.src = 'https://www.googletagmanager.com/gtm.js?id=GTM-TS7S7BXS';
					
					var firstScript = document.getElementsByTagName('script')[0];
					firstScript.parentNode.insertBefore(gtmScript,firstScript);
				</script>
			
		

		
			 
	
			<script>
				serviceName = 'google-tagmanager-service-13';

				// Define the service settings and dynamically assign values for each service
				consenTypeObj = {
					ad_storage: 1 != 0 ? "granted" : "not set",
					analytics_storage: 0 != 0 ? "denied" : "not set",
					ad_user_data: 1 != 0 ? "granted" : "not set",
					ad_personalization: 1 != 0 ? "granted" : "not set",
					functionality_storage: 0 != 0 ? "denied" : "not set",
					personalization_storage: 0 != 0 ? "denied" : "not set",
					security_storage: 1 != 0 ? "granted" : "granted"
				};
				
				// Check if any of the services are active
				serviceIsTypeOfConsentMode = (
					consenTypeObj.ad_storage != "not set" ||
					consenTypeObj.analytics_storage != "not set" ||
					consenTypeObj.ad_user_data != "not set" ||
					consenTypeObj.ad_personalization != "not set" ||
					consenTypeObj.functionality_storage != "not set" ||
					consenTypeObj.personalization_storage != "not set" ||
					consenTypeObj.security_storage != "not set"
				);
					
				serviceSetting = {
					serviceId: serviceName,
					serviceConsent: serviceIsTypeOfConsentMode,
					ad_storage: consenTypeObj.ad_storage,
					analytics_storage: consenTypeObj.analytics_storage,
					ad_user_data: consenTypeObj.ad_user_data,
					ad_personalization: consenTypeObj.ad_personalization,
					functionality_storage: consenTypeObj.functionality_storage,
					personalization_storage: consenTypeObj.personalization_storage,
					security_storage: consenTypeObj.security_storage
				};

				// Add the serviceSetting object to the allServiceSettings array
				allServiceSettings.push(serviceSetting);
			</script>
			
			
			
				<script type="opt-in" data-type="text/javascript" data-name="google-tagmanager-service-13">
				</script>
			
		

		
			 
	
			<script>
				serviceName = 'google-tagmanager-service-14';

				// Define the service settings and dynamically assign values for each service
				consenTypeObj = {
					ad_storage: 0 != 0 ? "denied" : "not set",
					analytics_storage: 1 != 0 ? "granted" : "not set",
					ad_user_data: 0 != 0 ? "denied" : "not set",
					ad_personalization: 0 != 0 ? "denied" : "not set",
					functionality_storage: 0 != 0 ? "denied" : "not set",
					personalization_storage: 0 != 0 ? "denied" : "not set",
					security_storage: 0 != 0 ? "denied" : "granted"
				};
				
				// Check if any of the services are active
				serviceIsTypeOfConsentMode = (
					consenTypeObj.ad_storage != "not set" ||
					consenTypeObj.analytics_storage != "not set" ||
					consenTypeObj.ad_user_data != "not set" ||
					consenTypeObj.ad_personalization != "not set" ||
					consenTypeObj.functionality_storage != "not set" ||
					consenTypeObj.personalization_storage != "not set" ||
					consenTypeObj.security_storage != "not set"
				);
					
				serviceSetting = {
					serviceId: serviceName,
					serviceConsent: serviceIsTypeOfConsentMode,
					ad_storage: consenTypeObj.ad_storage,
					analytics_storage: consenTypeObj.analytics_storage,
					ad_user_data: consenTypeObj.ad_user_data,
					ad_personalization: consenTypeObj.ad_personalization,
					functionality_storage: consenTypeObj.functionality_storage,
					personalization_storage: consenTypeObj.personalization_storage,
					security_storage: consenTypeObj.security_storage
				};

				// Add the serviceSetting object to the allServiceSettings array
				allServiceSettings.push(serviceSetting);
			</script>
			
			
			
				<script type="opt-in" data-type="text/javascript" data-name="google-tagmanager-service-14">
				</script>
			
		

		
			
    
    

		
			
    
			<script>
				// Define dataLayer and the gtag function.
				window.dataLayer = window.dataLayer || [];
				function gtag(){dataLayer.push(arguments);}

				// Set default consent to 'denied'
				gtag('consent', 'default', {
					'ad_storage': 'denied',
					'analytics_storage': 'denied',
					'ad_user_data': 'denied',
					'ad_personalization': 'denied',
					'functionality_storage': 'denied',
					'personalization_storage': 'denied',
					'security_storage': 'granted',
					'wait_for_update': 500
				});
				
				consenTypeObj = {
					ad_storage: 2 != 0 ? "denied" : "denied",
					analytics_storage: 1 != 0 ? "granted" : "denied",
					ad_user_data: 2 != 0 ? "denied" : "denied",
					ad_personalization: 2 != 0 ? "denied" : "denied",
					functionality_storage: 1 != 0 ? "granted" : "denied",
					personalization_storage: 1 != 0 ? "granted" : "denied",
					security_storage: 1 != 0 ? "granted" : "granted"
				};
			</script>

			
			
			
				<script>
					gtag('js', new Date());
					gtag('config', 'G-HCPVJRGN8W');
					//Enable ads_data_redaction by default
					gtag('set', 'ads_data_redaction', true);
				</script>
				<script type="opt-in" data-type="text/javascript" data-name="google-analytics-7">
					function gtag() { dataLayer.push(arguments); }
					
					gtag('consent', 'update',
sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML No
B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.polimi.it/
200https://polimi.it/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://polimi.it/ → https://www.polimi.it/

Consistent

B
TLS Certificate Expiry & Recommendations
216 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

216
days left
0d 30d 60d 90d+

Recommended actions

  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
1 A records, 185 ms lookup
PASS
1 A records, 185 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 131.175.187.72
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
3 nameserver(s) configured
Got: ns.polimi.it, ns2.polimi.it, dns.cineca.it
Info::
1 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 185 ms
Got: 185 ms
A131.175.187.72
AAAA—
CNAME—
NSns.polimi.it, ns2.polimi.it, dns.cineca.it
MX
0 polimi-it.mail.protection.outlook.com
TXT
docusign=5f6882ea-2c1e-4e83-9d14-4226ee3f2bd5
SPF v=spf1 ip4:131.175.12.10 ip4:131.175.12.100 ip4:131.175.12.18 ip4:131.175.12.21 ...
cisco-ci-domain-verification=282325f6612e5ee5cf0fa640c7bed93bc9ddd356fc7b9cd4bcf...
openai-domain-verification=dv-7tvfMQGWUMpcvaicmODogf2r
HARICA-86UbTh32x15i7oL0mRR
autodesk-domain-verification=zRla15F4fagBegAFTvUs
google-site-verification=hlcw8x--vXTMo3i8Wc0txNECB8RGDtUsMwbD_1Y-s4s
7gw7tct9fm6f4tcs1b0mp9qbxr4ln382
CAALookup not available with standard resolver
Resolved in 185 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A+
Domain Intelligence
polimi.it — via GARR-REG, 30 years, 8 months old, hosted on ASGARR Consortium GARR, IT
PASS
polimi.it — via GARR-REG, 30 years, 8 months old, hosted on ASGARR Consortium GARR, IT
Info::
Domain registered until Jan 29, 2027 (9 months remaining)
Info::
Registrar: GARR-REG
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Info::
Hosting: ASGARR Consortium GARR, IT
Got: AS137
Domain expiry

201 days

January 29, 2027

SSL certificate

216 days

Issued by Hellenic Academic and Research Institutions CA

Domain age

30 years, 8 months

Registered January 29, 1996

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

ASGARR Consortium GARR, IT

ASN AS137

131.175.187.72

Registrar

GARR-REG

Unlocked 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar GARR-REG
Created January 29, 1996 (30 years, 8 months ago)
Expires January 29, 2027 (9 months)
Last Updated April 16, 2026
Name Servers dns.cineca.it, ns.polimi.it, ns2.polimi.it
Registrant Politecnico di Milano
Hosting
IP Address 131.175.187.72
ASN AS137 (ASGARR Consortium GARR, IT)
Provider ASGARR Consortium GARR, IT
Data source: whois (2.0s)

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A
HTTP Probe Timing
Total 658 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
168 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
161 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
168 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
658 ms
Total Time Total request time from DNS lookup through full response.
659 ms

Connection waterfall

DNS Lookup 168 ms TCP Connect 161 ms TLS Handshake 168 ms Server Processing 162 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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