Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BTLS Certificate Expiry & Recommendations156 days until leaf cert expires — 4 issues to addressREVIEW
Certificate validity
Recommended actions
- Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- 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 Records2 A records, 8 ms lookupPASS
| A | 52.211.175.112, 46.51.152.173 |
| AAAA | — |
| CNAME | — |
| NS | ns-1312.awsdns-36.org, ns-1975.awsdns-54.co.uk, ns-216.awsdns-27.com, ns-614.awsdns-12.net |
| MX | 10 eu-smtp-inbound-2.mimecast.com 10 eu-smtp-inbound-1.mimecast.com |
| TXT | MS=ms29366648 ZOOM_verify_Y2dFAf9XSvKUg2ORTS2gbA _d9fobryb9tqfk45536hpew2uv4vk7fj _fll40i3jwu0v9mdj8by1zeexxqnwn49 facebook-domain-verification=aoj6xe4ia6zv9pa60oyg0gb8b09qn9 google-site-verification=74fv47FmtsFTQKexq3E3Aoc9wzfloilWotg0sGO9zHM jg02l4gtljwdvp587l9yst7wfhy49w91 q348mw8dy8f5625sp3b8mcdjh7gq1smh SPF v=spf1 ip4:52.16.14.52 ip4:195.140.184.0/22 ip4:91.192.40.0/22 include:amazonses... |
| CAA | Lookup not available with standard resolver |
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ARedirect Chain1 redirect(s), 453 ms totalPASS
https://channel4.com
331 ms · HTTP/1.1
https://www.channel4.com/
122 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://channel4.com | 301 | 331 ms | HTTP/1.1 | nginx |
| 2 | https://www.channel4.com/ | 200 | 122 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 1001 URLsPASS
Crawl-delay: 5
Sitemap: https://www.channel4.com/news/sitemap.xml
Sitemap: https://www.channel4.com/sitemap.xml
User-agent: TurnitinBot
Disallow: /
User-agent: *
Disallow: /news/?*
Disallow: /news/*/?*
Disallow: /press/unregistered-image-search?*
Disallow: /press/content-search?*
User-agent: CCBot
Disallow: /
User-agent: ClaudeBot
Disallow: /
User-agent: Claude-Web
Disallow: /
User-agent: anthropic-ai
Disallow: /
User-agent: cohere-ai
Disallow: /
User-agent: Bytespider
Disallow: /
User-agent: PetalBot
Disallow: /
User-agent: Applebot-Extended
Disallow: /
User-agent: GPTBot
Disallow: /
User-Agent: omgili
Disallow: /
User-agent: ChatGPT-User
Disallow: /
User-agent: Google-Extended
Disallow: /
User-Agent: PerplexityBot
Disallow: /
User-agent: Google-CloudVertexBot
Disallow: /
User-agent: meta-externalagent
Disallow: /
User-agent: OAI-SearchBot
Disallow: /
User-agent: YandexAdditional
Disallow: /
User-agent: YandexAdditionalBot
Disallow: /
User-agent: AdsBot-Google
Allow: /
User-agent: Googlebot
Allow: /
- https://www.channel4.com/news/welsh-major-party-leaders-debate-ahead-of-may-elections
- https://fournews-assets-prod-s3-ew1-nmprod.s3.amazonaws.com/media/2026/04/C4N-WALES-Leaders-Debate-SLATE.jpg
- https://www.channel4.com/news/wales-decides-reform-and-plaid-cymru-tied-in-lead-ahead-of-labour
- https://www.channel4.com/news/downing-street-pressured-me-to-approve-mandelson-hire-sacked-foreign-office-chief-says
- https://fournews-assets-prod-s3-ew1-nmprod.s3.amazonaws.com/media/2026/04/robbins-web-1.jpg
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
HTTP → HTTPS
Consistent
A+Domain Intelligencechannel4.com — via CSC Corporate Domains, Inc., 30 years, 10 months old, hosted on AWSPASS
122 days
November 16, 2026
156 days
Issued by Sectigo Limited
30 years, 10 months
Registered November 17, 1995
Not enabled
Protects against DNS spoofing
AWS
ASN AS16509
52.211.175.112
CSC Corporate Domains, Inc.
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
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.
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