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 & Recommendations141 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, 18 ms lookupPASS
| A | 192.190.47.159 |
| AAAA | — |
| CNAME | — |
| NS | ns-1259.awsdns-29.org, ns-1593.awsdns-07.co.uk, ns-258.awsdns-32.com, ns-975.awsdns-57.net |
| MX | 0 rsna-org.mail.protection.outlook.com |
| TXT | ZOOM_verify_UfxpeyvASZ6KEqtwt-zsmw apple-domain-verification=ADzc8G8ZvLu2S3UV atlassian-domain-verification=eZBUlE/InlbnBkv98y4283rO4OEca2n9mm0uLthEVWbbf0sqWV... atlassian-sending-domain-verification=e2a515c9-c952-4f6d-8f89-1fd8d1707ca4 facebook-domain-verification=69bfvxmbip9flluoghh1q95x7hmxf6 SPF v=spf1 ip4:65.156.0.0/23 ip4:192.190.47.0/24 ip4:216.33.126.11 a:mail2.netronixc... |
| 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), 322 ms totalPASS
https://rsna.org
144 ms · HTTP/1.1
https://www.rsna.org/
178 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://rsna.org | 301 | 144 ms | HTTP/1.1 | |
| 2 | https://www.rsna.org/ | 200 | 178 ms | HTTP/1.1 | Microsoft-IIS/10.0 |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 967 URLsPASS
Sitemap: https://www.radiologyinfo.org/sitemap-en.xml
Sitemap: https://www.radiologyinfo.org/sitemap-es.xml
Sitemap: https://www.rsna.org/rsna-sitemap.xml
A+Domain Intelligencersna.org — via Amazon Registrar, Inc., 32 years, 5 months old, hosted on SERVERCENTRAL - DEFT.COM, USPASS
304 days
April 16, 2027
141 days
Issued by Amazon
32 years, 5 months
Registered April 15, 1994
Not enabled
Protects against DNS spoofing
SERVERCENTRAL - DEFT.COM, US
ASN AS23352
192.190.47.159
Amazon Registrar, 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