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https://www.coloriet.nl

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
GRADE
A
FIX
0
REVIEW
7
PASS
10
INFO
0
Probed from Madrid, Spain
200 OK
Checks
17
10 PASS 7 REVIEW
B
DNS Records
1 A records, 63 ms lookup
REVIEW
1 A records, 63 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 198.202.211.1
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2620:cb:2000::1
Warning::
CNAME record at zone apex
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
Got: cdn.webflow.com
Info::
2 nameserver(s) configured
Got: lamar.ns.cloudflare.com, journey.ns.cloudflare.com
Info::
No MX records — email not configured via DNS
Info::
No SPF record found in TXT records
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Info::
DNS resolution time: 63 ms
Got: 63 ms
A198.202.211.1
AAAA2620:cb:2000::1
CNAMEcdn.webflow.com
NSlamar.ns.cloudflare.com, journey.ns.cloudflare.com
MX—
TXT—
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

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.

Learn more ▾

RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.

Source: RFC 1034

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more ▾

SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.

Source: RFC 7208 (SPF)

B
DNSSEC
Unsigned (DNSSEC not deployed)
REVIEW
Unsigned (DNSSEC not deployed)
Info::
DNSSEC is not deployed
The zone is not DNSSEC-signed. Users on validating resolvers (Cloudflare 1.1.1.1, Quad9 9.9.9.9, growing default in mobile resolvers) get no protection against DNS spoofing for this domain. Most registrars now offer DNSSEC at a single click; consider enabling it for sites where authenticity matters (banking, healthcare, government).
B
CAA Records
No CAA records (any CA may issue certificates)
REVIEW
No CAA records (any CA may issue certificates)
Info::
No CAA records published
Without CAA records, any publicly-trusted CA can issue certificates for this domain. Adding a CAA record (`yourdomain. IN CAA 0 issue "letsencrypt.org"`) restricts issuance to CAs you authorize. Required by CAB Forum baseline since 2017; the default of 'any CA' is widely supported but is the broader attack surface for issuance fraud.
C
Reverse DNS
Action
0/2 IPs match cert SAN
REVIEW
0/2 IPs match cert SAN
Info::
PTR lookup failed for 198.202.211.1: lookup 198.202.211.1: no such host
No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue.
Info::
PTR lookup failed for 2620:cb:2000::1: lookup 2620:cb:2000::1: no such host
No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue.
B
TLS Certificate Expiry & Recommendations
80 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

80
days left
0d 30d 60d 90d+

Recommended actions

  • Add includeSubDomains to the HSTS directive
  • 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
B
Operational Status Page
No status page link detected
REVIEW
No status page link detected
Info::
No operational status page link detected
Status pages communicate planned maintenance and incidents to users -- a hallmark of operationally-mature services. Most SaaS teams publish one via Atlassian Statuspage, Instatus, BetterUptime, or a self-hosted Cachet. Smaller sites legitimately don't need one; flagged as Info, not a failure.
B
Health Check Endpoint
No conventional health endpoint found
REVIEW
No conventional health endpoint found
Info::
No conventional health endpoint found
Health endpoints (/health, /healthz, /status, /ping, /api/health) let uptime monitors, load balancers, and orchestration systems (Kubernetes, ECS, Fly.io) verify the service is alive. Marketing sites and small services often skip them legitimately; flagged as Info, not a failure. Probe results: /api/health: 404, /health: 404, /healthz: 404, /ping: 404, /status: 404.
A+
Subdomain Takeover
No subdomain takeover risk detected
PASS
No subdomain takeover risk detected
Info::
CNAME does not point at a known takeover-able service
A+
Multi-Resolver DNS Speed
Mean 43ms across 3 resolvers (spread 23ms)
PASS
Mean 43ms across 3 resolvers (spread 23ms)
Info::
Google: 33ms
Got: 33ms via 8.8.8.8:53
Info::
Cloudflare: 41ms
Got: 41ms via 1.1.1.1:53
Info::
Quad9: 56ms
Got: 56ms via 9.9.9.9:53
A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://www.coloriet.nl

https://www.coloriet.nl

63 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://www.coloriet.nl20063 msHTTP/1.1cloudflare
A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2620:cb:2000::1
Got: 17 ms connect
IPv6 Ready
AAAA Records 2620:cb:2000::1 Connection Reachable (17 ms)
A+
Crawlability
robots.txt present, sitemap with 154 URLs
PASS
robots.txt present, sitemap with 154 URLs
Info::
robots.txt is present
Got: 44 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 154 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 44 B Sitemaps referenced 1 User-agents Blocking No — crawling allowed
Sitemap: https://www.coloriet.nl/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 154 entries Valid XML Yes
Sample URLs:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: www)
Info::
HTTP correctly redirects to HTTPS permanently
Got: HTTP 301

www / non-www

200https://www.coloriet.nl/
301https://coloriet.nl/

Preferred variant: www

HTTP → HTTPS

301http://www.coloriet.nl/ → https://www.coloriet.nl/

Consistent

A+
Domain Intelligence
coloriet.nl — via team.blue nl B.V., 26 years, 1 months old, hosted on Cloudflare
PASS
coloriet.nl — via team.blue nl B.V., 26 years, 1 months old, hosted on Cloudflare
Info::
Registrar: team.blue nl 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: Cloudflare
Got: AS209242
Domain expiry

Unknown

SSL certificate

80 days

Issued by Google Trust Services

Domain age

26 years, 1 months

Registered November 6, 2000

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS209242

198.202.211.1

Registrar

team.blue nl B.V.

Unlocked 3 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 team.blue nl B.V.
Created November 6, 2000 (26 years, 1 months ago)
Last Updated October 6, 2022
Name Servers ns0.transip.net, ns1.transip.nl, ns2.transip.eu
Hosting
IP Address 198.202.211.1
ASN AS209242 (CLOUDFLARESPECTRUM - Cloudflare London, LLC, US)
Provider Cloudflare
Data source: whois (1.0s)

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

Connection waterfall

DNS Lookup 51 ms TCP Connect 1 ms TLS Handshake 8 ms Server Processing 93 ms Content Transfer 1 ms
A+
CDN & Delivery
Cloudflare (HIT)
PASS
Cloudflare (HIT)
Info::
Site is served via Cloudflare CDN (edge: MAD)
Got: cf-ray: a2e311a8a9c0273c-MAD
Info::
CDN cache status: HIT
CDN Detected: Cloudflare
Provider Cloudflare Cache Status HIT Evidence cf-ray: a2e311a8a9c0273c-MAD
A+
CDN Cache Observability
Cache state: HIT
PASS
Cache state: HIT
Info::
CDN cache state observable via 2 header(s)
Got: age=4746, cf-cache-status=HIT
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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