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https://eur.nl

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
85
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
5 PASS 3 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.

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

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.eur.nl/
200https://eur.nl/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://eur.nl/ → https://eur.nl:443/

Consistent

B
TLS Certificate Expiry & Recommendations
185 days until leaf cert expires — 2 issues to address
REVIEW

Certificate validity

185
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
1 A records, 63 ms lookup
PASS
1 A records, 63 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 145.5.1.13
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns2.surfnet.nl, ns3.surfnet.nl, ns1.zurich.surf.net, ns1.surfnet.nl
Info::
2 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: 63 ms
Got: 63 ms
A145.5.1.13
AAAA—
CNAME—
NSns2.surfnet.nl, ns3.surfnet.nl, ns1.zurich.surf.net, ns1.surfnet.nl
MX
0 eur-nl.u-v1.mx.microsoft
100 eur-nl.u-v1.mx.microsoft
TXT
miro-verification=3398bd3172ee4fdacc0f52cbb57f29046f36b258
google-site-verification=7G3yzcbmHsVEQ1d5JQbX_TYGFOQMm5mc1R7-LwRX5V8
adobe-idp-site-verification=5d3a6228d29e80cf1fe4d4a5780ebd08c45fc8e741b748a0d7e6...
onetrust-domain-verification=998a55c3893542bf9fd293e5d43cace6
HARICA-7uE5IN7UTwVmW4csP9O
atlassian-sending-domain-verification=a3167b86-dd70-4cce-afe1-483a0ea29125
dropbox-domain-verification=w1n7zplsemor
SPF v=spf1 include:spf.protection.outlook.com include:_spf-dc33.sapsf.eu ip4:145.5.1...
lucidlink-verification=4J4J8ENHA0YP2VC3V34NSSGXBC
DomainVerification=PB6MCJE440ENQI4R30H3SC344Z8YTY1ZMU1EMMYM0V4PX5QX4LBJGFFMHCXFZ...
d365mktkey=9ORp7o73g5MCxKaBRiogxHXoYpxC3PXlNbBwawcGZTYx
atlassian-domain-verification=kURX4B7iRnGEndh49X3Y8rq2tTKFeUqiqh2n6sCvxAgB7mN5kI...
apple-domain-verification=39o70d6krwowTWam
HARICA-18cc123R6Bfy4Wo8aii
CAALookup not available with standard resolver
Resolved in 63 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
Redirect Chain
1 redirect(s), 276 ms total
PASS
1 redirect(s), 276 ms total
Info::
Single redirect
Got: https://eur.nl → https://www.eur.nl/ (301)
Info::
WWW normalization redirect

https://eur.nl

110 ms · HTTP/1.1

301

https://www.eur.nl/

167 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://eur.nl301110 msHTTP/1.1
2https://www.eur.nl/200167 msHTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 11 URLs
PASS
robots.txt present, sitemap with 11 URLs
Info::
robots.txt is present
Got: 2318 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 11 entries
Info::
Sitemap index with 11 child sitemaps
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

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 2318 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed
#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /search
Disallow: /search?
Disallow: /zoeken?
Disallow: /zoeken
Disallow: /?f=
Disallow: /*?f%5B0%5D=
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/search/
Disallow: /index.php/search
Disallow: /index.php/search?
Disallow: /index.php/zoeken?
Disallow: /index.php/zoeken
Disallow: /index.php/?f=
Disallow: /index.php/*?f%5B0%5D=
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed
sitemap.xml 200 OK
Type Sitemap Index URLs 11 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
eur.nl — via SURF B.V., 38 years, 9 months old, hosted on SURFNET-NL SURFnet, The Netherlands, NL
PASS
eur.nl — via SURF B.V., 38 years, 9 months old, hosted on SURFNET-NL SURFnet, The Netherlands, NL
Info::
DNSSEC is enabled
Info::
Registrar: SURF B.V.
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: SURFNET-NL SURFnet, The Netherlands, NL
Got: AS1103
Domain expiry

Unknown

SSL certificate

185 days

Issued by Hellenic Academic and Research Institutions CA

Domain age

38 years, 9 months

Registered January 13, 1988

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

SURFNET-NL SURFnet, The Netherlands, NL

ASN AS1103

145.5.1.13

Registrar

SURF B.V.

Unlocked 4 NS records
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar SURF B.V.
Created January 13, 1988 (38 years, 9 months ago)
Last Updated November 4, 2025
Name Servers ns2.surfnet.nl, ns3.surfnet.nl, ns1.zurich.surf.net, ns1.surfnet.nl
DNSSEC Enabled
Registrant Erasmus Universiteit Rotterdam
Hosting
IP Address 145.5.1.13
ASN AS1103 (SURFNET-NL SURFnet, The Netherlands, NL)
Provider SURFNET-NL SURFnet, The Netherlands, NL
Data source: rdap (0.4s)

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 157 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
50 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
33 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
42 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
158 ms
Total Time Total request time from DNS lookup through full response.
158 ms

Connection waterfall

DNS Lookup 50 ms TCP Connect 33 ms TLS Handshake 42 ms Server Processing 33 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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