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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 Amsterdam, Netherlands
200 OK
Checks
17
10 PASS 7 REVIEW
B
DNS Records
4 A records, 293 ms lookup
REVIEW
4 A records, 293 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 151.101.0.144, 151.101.64.144, 151.101.128.144, 151.101.192.144
Info::
Has 4 IPv6 (AAAA) record(s)
Got: 2a04:4e42::144, 2a04:4e42:400::144, 2a04:4e42:200::144, 2a04:4e42:600::144
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: www-gov-uk.map.fastly.net
Info::
No NS records found
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'.
Warning::
DNS resolution is slow (293 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 293 ms
A151.101.0.144, 151.101.64.144, 151.101.128.144, 151.101.192.144
AAAA2a04:4e42::144, 2a04:4e42:400::144, 2a04:4e42:200::144, 2a04:4e42:600::144
CNAMEwww-gov-uk.map.fastly.net
NS—
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 293 ms

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)

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

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
0/8 IPs match cert SAN
REVIEW
0/8 IPs match cert SAN
Info::
PTR lookup failed for 151.101.0.144: lookup 151.101.0.144: 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 151.101.64.144: lookup 151.101.64.144: 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 151.101.128.144: lookup 151.101.128.144: 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 151.101.192.144: lookup 151.101.192.144: 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 2a04:4e42::144: lookup 2a04:4e42::144: 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 2a04:4e42:400::144: lookup 2a04:4e42:400::144: 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 2a04:4e42:200::144: lookup 2a04:4e42:200::144: 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 2a04:4e42:600::144: lookup 2a04:4e42:600::144: 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
233 days until leaf cert expires — 2 issues to address
REVIEW

Certificate validity

233
days left
0d 30d 60d 90d+

Recommended actions

  • Add includeSubDomains to the HSTS directive
  • Enable DNSSEC on your domain for DNS spoofing protection
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 16ms across 3 resolvers (spread 43ms)
PASS
Mean 16ms across 3 resolvers (spread 43ms)
Info::
Cloudflare: 1ms
Got: 1ms via 1.1.1.1:53
Info::
Google: 5ms
Got: 5ms via 8.8.8.8:53
Info::
Quad9: 44ms
Got: 44ms 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.gov.uk

https://www.gov.uk

9 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://www.gov.uk2009 msHTTP/1.1nginx
A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a04:4e42::144, 2a04:4e42:400::144, 2a04:4e42:200::144, 2a04:4e42:600::144
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a04:4e42::144, 2a04:4e42:400::144, 2a04:4e42:200::144, 2a04:4e42:600::144 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 35 URLs
PASS
robots.txt present, sitemap with 35 URLs
Info::
robots.txt is present
Got: 1097 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 35 entries
Info::
Sitemap index with 35 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1097 B Sitemaps referenced 1 User-agents deepcrawl, MS Search 6.0 Robot, *, meta-externalagent, AhrefsBot Blocking No — crawling allowed
User-agent: *
Disallow: /*/print$
# Don't allow indexing of site search
Disallow: /search/all*
Sitemap: https://www.gov.uk/sitemap.xml

# The Meta-ExternalAgent crawler crawls the web for use cases such as training foundation AI models.
# It results in timeouts from Vertex that back up requests from users making genuine searches
User-agent: meta-externalagent
Disallow: /search/all*

# https://ahrefs.com/robot/ crawls the site frequently
User-agent: AhrefsBot
Crawl-delay: 10

# https://www.deepcrawl.com/bot/ makes lots of requests. Ideally we'd slow it
# down rather than blocking it but it doesn't mention whether or not it
# supports crawl-delay.
User-agent: deepcrawl
Disallow: /

# Complaints of 429 'Too many requests' seem to be coming from SharePoint servers
# (https://social.msdn.microsoft.com/Forums/en-US/3ea268ed-58a6-4166-ab40-d3f4fc55fef4)
# The robot doesn't recognise its User-Agent string, see the MS support article:
# https://support.microsoft.com/en-us/help/3019711/the-sharepoint-server-crawler-ignores-directives-in-robots-txt
User-agent: MS Search 6.0 Robot
Disallow: /
sitemap.xml 200 OK
Type Sitemap Index URLs 35 entries Valid XML Yes
Child Sitemaps:
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 301-redirects to HTTPS

www / non-www

200https://www.gov.uk/
301https://gov.uk/

Preferred variant: www

HTTP → HTTPS

301http://www.gov.uk/ → https://www.gov.uk/

Consistent

A+
Domain Intelligence
www.gov.uk — via .gov.uk Registry, 13 years, 9 months old
PASS
www.gov.uk — via .gov.uk Registry, 13 years, 9 months old
Info::
Domain registered until Sep 24, 2026 (4 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: .gov.uk Registry
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.
Domain expiry

130 days

September 24, 2026

SSL certificate

233 days

Issued by GlobalSign nv-sa

Domain age

13 years, 9 months

Registered September 24, 2012

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2a04:4e42::144

Registrar

.gov.uk Registry

Unlocked Name servers unknown
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar .gov.uk Registry
Created September 24, 2012 (13 years, 9 months ago)
Expires September 24, 2026 (4 months)
Last Updated September 24, 2025
DNSSEC Not enabled
Registrant PLACEHOLDER
Hosting
IP Address 2a04:4e42::144
Data source: rdap (0.1s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

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 11 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
3 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.
5 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
10 ms
Total Time Total request time from DNS lookup through full response.
12 ms

Connection waterfall

DNS Lookup 3 ms TCP Connect 1 ms TLS Handshake 5 ms Server Processing 2 ms Content Transfer 1 ms
A+
CDN & Delivery
Fastly (HIT)
PASS
Fastly (HIT)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-rtm-ehrd2290035-RTM
Info::
CDN cache status: HIT
CDN Detected: Fastly
Provider Fastly Cache Status HIT Evidence x-served-by: cache-rtm-ehrd2290035-RTM
A+
CDN Cache Observability
Cache state: HIT
PASS
Cache state: HIT
Info::
CDN cache state observable via 4 header(s)
Got: age=142, x-cache=HIT, x-cache-hits=1, x-served-by=cache-rtm-ehrd2290035-RTM
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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