Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DURL VariantsActionwww/non-www, trailing slash, HTTP→HTTPSFIX
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
HTTP version does not redirect to HTTPS
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
BCrawlabilityno robots.txt, no sitemapREVIEW
robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
No robots.txt — crawlers fetch /robots.txt and get 404; not breaking but means default crawl behavior with no directives or sitemap reference.
Learn more ▾ ▴
A minimal robots.txt with `User-agent: * / Allow: / / Sitemap: https://example.com/sitemap.xml` covers the basics. Without it, crawlers behave fine but lose the sitemap signal and can't be selectively blocked from crawl-traps.
Source: robotstxt.org
A sitemap helps search engines discover and index your pages more efficiently.
No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.
Learn more ▾ ▴
A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.
Source: sitemaps.org / Google Search Central
No robots.txt found
This is fine for most sites — a missing robots.txt allows all crawling by default.
No sitemap found
Adding a sitemap helps search engines discover your pages.
BTLS Certificate Expiry & Recommendations320 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, 43 ms lookupPASS
| A | 50.144.202.30 |
| AAAA | — |
| CNAME | — |
| NS | edns2.ultradns.org, edns2.ultradns.biz, edns2.ultradns.com, edns2.ultradns.net |
| MX | 1 aspmx.l.google.com 5 alt2.aspmx.l.google.com 5 alt1.aspmx.l.google.com 10 alt4.aspmx.l.google.com 10 alt3.aspmx.l.google.com |
| TXT | miro-verification=2a157e30e68d6f58a7d3a176f61d0aabc39b78c0 jamf-site-verification=OgBGg6Pxte-TXigqnqCDgw b0f4b142e971e905afa50c9548ea93b0e4508f4fa69bb2260a19e45c38cdd52e ZOOM_verify_kInvqjVMThmIpy2u0kHbsg google-site-verification=j_QUAWQ-H1VK9HdOpJMD_goK-KMfQquKVSw-QfznUgs atlassian-domain-verification=TKLaQ4jEIp1x/aA547RS4WHick3F6wkaz3RoWUauzx72eicDB3... 77b70c45-f973-44d0-8083-e40c785a649b atlassian-domain-verification=gk87bBYOaX22kk9MFpfKhQuZ5w7crXifbQYFxkSWvmbQkcbrSF... google-site-verification=F_Ofx_lN9LSTDweF91-NEeXRCmAJPdUHki84NaULDyM MS=ms15993877 apple-domain-verification=nROvn3WuybUjKrLY SPF v=spf1 ip4:50.144.202.0/25 ip4:44.198.253.9/32 include:_spf.google.com include:m... google-site-verification=sFYEFQazLdFm677ha3TAKLfM9QeSnKnF0dM-MhaqFYw docusign=0d1f8006-64cb-4f33-98ab-b069ba4d4ca7 adobe-idp-site-verification=e4ebeb175a25ee6383dcc347c6fc9feb98f86ff1c117ea498561... docusign=b92e2ed4-f04e-43ba-8a3d-a56863e4de14 0e51ff7a-409e-458b-994f-04942c0aaf5f |
| 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.
A+Redirect Chain0 redirect(s), 389 ms totalPASS
https://ushmm.org
389 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://ushmm.org | 403 | 389 ms | HTTP/1.1 | nginx |
A+Domain Intelligenceushmm.org — via Network Solutions, LLC, 32 years, 11 months old, hosted on UNITED-STATES-HOLOCAUST-MEMORIAL-MUSEUM - United States Holocaust Memorial Museum, USPASS
135 days
October 27, 2026
320 days
Issued by Entrust Limited
32 years, 11 months
Registered October 28, 1993
Not enabled
Protects against DNS spoofing
UNITED-STATES-HOLOCAUST-MEMORIAL-MUSEUM - United States Holocaust Memorial Museum, US
ASN AS33738
50.144.202.30
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