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
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations73 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- 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 Records1 A records, 78 ms lookupPASS
| A | 40.71.250.191 |
| AAAA | — |
| CNAME | — |
| NS | ns3-04.azure-dns.org, ns1-04.azure-dns.com, ns2-04.azure-dns.net, ns4-04.azure-dns.info |
| MX | 10 mx2.hc200635.iphmx.com 10 mx1.hc200635.iphmx.com |
| TXT | onx=ff6aba77-9a2f-4490-ad64-c325fb1cb78e TZD2Q8UZCLNT73GG6OM245OW9VBGY7USL327STC9V google-site-verification=moKbLj3ms9kKgs9Mosg4birGP4uL3kosvRCN-hBEiuM apple-domain-verification=UBuXRbX1wqt6aBAL google-site-verification=cS_KPfCVlVto6ezGYFsb4UFzle4XOF-FYp8fx8CVcXw stripe-verification=CF7A0B86D810D4C96FA7E6BD3970472A252B7E188622F583F1BE0620201D... SPF v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:outboundmail.con... adobe-idp-site-verification=e69aa7950f076f64bbd50cf78d008a44a0737dee41ac500328c1... jamf-site-verification=bCR99Ny3NPJpgEb_03mrVg logmein-verification-code=e14b97a5-812d-482d-bc79-e718f67a0d5e google-site-verification=EC9L3iOQPRB3f_z5JDkP6dnIPhzSOA4vao_5yjsq4qE acsproxyprod.azurewebsites.net canva-site-verification=qALYrkxMsQ-1eSuPGHadXw SFMC-XMCMCXoQbxJo109i8OgphFGBKzG0-wK9gmGPv4l6 facebook-domain-verification=f3ac5pzjb7omdn0aac9cuwhsuuqbw3 onetrust-domain-verification=6260a0a6bf964d1881aa954ec95af136 _79rj93f3s12cb8nvukev4y9cdch4yyg docusign=6db2a367-6cc5-4df6-937d-d25380dae68d google-gws-recovery-domain-verification=52904069 sd82dgz56rlsyr69r3xj adobe-aem-verification=qa.cancer.org/64216/543768/f1f67e16-fbc1-481c-8d16-95c4af... |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
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.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ARedirect Chain1 redirect(s), 490 ms totalPASS
https://cancer.org
412 ms · HTTP/1.1
https://www.cancer.org/
78 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://cancer.org | 301 | 412 ms | HTTP/1.1 | Microsoft-IIS/10.0 |
| 2 | https://www.cancer.org/ | 200 | 78 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 3496 URLsPASS
User-agent: *
Allow: /
Disallow: */content/cancer/en/cancer/understanding-cancer/glossary/glossary/
Disallow: */content/cancer/es/cancer/understanding-cancer/glossary/glossary/
Disallow: */cancer/understanding-cancer/glossary/glossary/
Disallow: */content/cancer/en/
Disallow: */content/cancer-staging/
Disallow: */content/dam/CRC/
Disallow: *?q=
Sitemap: https://www.cancer.org/sitemap.xml
Sitemap: https://www.cancer.org/es/sitemap.xml
A+Domain Intelligencecancer.org — via Network Solutions, LLC, 32 years old, hosted on Microsoft AzurePASS
1207 days
October 5, 2029
73 days
Issued by Sectigo Limited
32 years
Registered October 6, 1994
Not enabled
Protects against DNS spoofing
Microsoft Azure
ASN AS8075
40.71.250.191
Network Solutions, LLC
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