Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.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
CURL VariantsActionwww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Use 301 (permanent) instead of 302 (temporary)
BTLS Certificate Expiry & Recommendations178 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
BCDN & DeliveryCloudflareREVIEW
A+DNS Records2 A records, 7 ms lookupPASS
| A | 104.17.79.30, 104.17.78.30 |
| AAAA | — |
| CNAME | — |
| NS | olga.ns.cloudflare.com, skip.ns.cloudflare.com |
| MX | 10 mail.mailroute.net |
| TXT | 3w6lthcz5h4qpgtd8n8szx1m474v73tz 83zn0ndgz9jvwx563vp9qbyz38hqb7kl MS=F1C3025E76F2E7036C9EAF6DBC2DF0C8D2D4AA87 _ead5vviqjla5mjijrh4zvhsujcx843n _isyuzeobyu2bijfg78028dab2ac4f5r abuseipdb-verification=D4c0J6WF brevo-code:e7393522d4f06661f44afbccb0cebfc6 duo_sso_verification=oFRYT7Y1MADnakU5K1wxwe47F9TsTRZ76IZL8bgH2J0NFoipvgi5tAE6kTm... google-site-verification=8gUY1AtsZ3BzLVSHLSv3wXIE8MpnWrGgVrmvVxM1MjE google-site-verification=lqxyh1_UaHYvgAfZ3gvxIDJi3quBVO_5Lq_pDUOKdNw p0yygcm8ljrr9v47xkgrk4cjdvpctb6t SPF v=spf1 include:_spf.acm_org._d.easydmarc.pro ~all |
| 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), 185 ms totalPASS
https://acm.org
29 ms · HTTP/1.1
https://www.acm.org/
157 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://acm.org | 302 | 29 ms | HTTP/1.1 | cloudflare |
| 2 | https://www.acm.org/ | 200 | 157 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
If permanent, use 301 instead.
302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.
Learn more ▾ ▴
Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).
Source: Google Search Central
ACrawlabilityrobots.txt present, no sitemapPASS
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
User-agent: *
Disallow: /live-search
Disallow: /404
Disallow: /landing-page-documents/
Disallow: /referenced-ctalist/
Disallow: /Member/
Disallow: /history-acm-org/
Disallow: /amturing-acm-org/
Disallow: /student-chapter-excellence-awards/
Disallow: /chapters/students/excellence-awards/
Disallow: /conferences/non-acm-events
Disallow: /conferences/conference-events
Disallow: /chapters/local-activities
Disallow: /award_winners
Disallow: /chapters.html
Disallow: /amg.html
Disallow: /publications/proceedings-template
Disallow: /calendar
User-agent: *
Disallow: /calendar
Sitemap: https://www.acm.org/sitemap.xml
No sitemap found
Adding a sitemap helps search engines discover your pages.
A+Domain Intelligenceacm.org — via Network Solutions, LLC, 34 years, 8 months old, hosted on CloudflarePASS
580 days
February 15, 2028
178 days
Issued by DigiCert Inc
34 years, 8 months
Registered February 14, 1992
Not enabled
Protects against DNS spoofing
Cloudflare
ASN AS13335
104.17.78.30
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