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
CCrawlabilityActionrobots.txt present, sitemap with 4 URLsREVIEW
Disallow: / for all user-agents prevents search engines from indexing any page. This will remove the site from search results.
Disallow: / in robots.txt blocks every search crawler — the site becomes invisible in organic search.
Learn more ▾ ▴
Common deployment mistake: a staging robots.txt with `User-agent: * / Disallow: /` ships to prod. The site falls out of search results within days. Verify your robots.txt is the production-intended version. If this is intentional (private site), no action needed.
Source: Google Search Central
User-Agent: googlebot
User-Agent: bingbot
User-Agent: msnbot
User-Agent: Twitterbot
User-Agent: Slurp
User-Agent: LinkedInBot
User-Agent: DuckDuckBot
User-agent: SiteimproveBot-Crawler
User-agent: SiteimproveBot-Crawler
Crawl-delay: 30
sitemap: https://www.cuny.edu/sitemap.xml
sitemap: https://policy.cuny.edu/sitemap.xml
Disallow: /global-components/
Disallow: /d-i/
Disallow: /cgi-bin/
Disallow: /search/
Disallow: /wp-admin/
Disallow: /wp-includes/
Disallow: /wp-content/plugins/
Disallow: /wp-content/themes/
Disallow: /alumni-test/
Disallow: /role-template/
Disallow: /home-preview/
Disallow: /about/administration/offices/sa/
Disallow: /homepage/digital-displays/
Disallow: /employment/search-jobs/
Disallow: /old-version/
Disallow: /policyimport/
Disallow: /global-assets/
Disallow: /*includes/
# Added June 15, 2024
Disallow: /*?utm=*
User-agent: SemanticScholarBot
Disallow: /
User-agent: facebookexternalhit
Disallow:
User-agent: Go-http-client
Disallow: /
User-agent: *
Disallow: /
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations315 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 Records1 A records, 73 ms lookupPASS
| A | 128.228.254.200 |
| AAAA | — |
| CNAME | — |
| NS | acme.ucc.cuny.edu, hudson.cis.cuny.edu, lavinia.cis.cuny.edu, ns15.customer.level3.net, harlem.cis.cuny.edu, ext-ns1.columbia.edu, ns10.customer.level3.net |
| MX | 10 mxa-00011d01.gslb.pphosted.com 10 mxb-00011d01.gslb.pphosted.com |
| TXT | MS=ms27473493 SPF v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all webexdomainverification.4C675B87E989B136E053AB06FC0A3F65=03254d60-db21-4551-8c5f... cisco-ci-domain-verification=55748314683236f7f75eb5db39c6d75e1a7c007102bbdb38121... google-site-verification=mU3QrvBZTAEi8pVAU1H8r6qYeWLMh6EkHFoAR7XsgBs MS=ms38633672 apple-domain-verification=6ewooW8KlycMTlpN _ajdf6x21up5oyeudymw3dez1igxzxp1 google-site-verification=FAsKlRNXwxjZdV3L0d4tA34fUdV-N1UIaHJMVbTD_E0 zone-ownership-verification-931446c350c61d4e45ea4083fe33be715341be8713c84eff1e09... ebacpv7jrfvc0mkn6bj73jus1u airtable-verification=a0cabfdbd213cb09c30dc58840e15a00 duo_sso_verification=eK3Sdj1sDZNpX4gF6YU0JujwRuGEAJ0pAQeiux6MBGrXFA00XQ7d1GgCMCK... asv=9a2329e164caa84ef39e973d33d2d3e1 ReleaseWLIDNamespace=true |
| 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), 991 ms totalPASS
https://cuny.edu
495 ms · HTTP/1.1
https://www.cuny.edu/
496 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://cuny.edu | 301 | 495 ms | HTTP/1.1 | nginx |
| 2 | https://www.cuny.edu/ | 200 | 496 ms | HTTP/1.1 | nginx |
See the visual redirect chain in the HTTP Probe tab →
A+Domain Intelligencecuny.edu — 39 years, 6 months old, hosted on CITY-UNIVERSITY-OF-NEW-YORK - City University of New York, USPASS
41 days
July 31, 2026
315 days
Issued by Sectigo Limited
39 years, 6 months
Registered April 22, 1987
Status unknown
Protects against DNS spoofing
CITY-UNIVERSITY-OF-NEW-YORK - City University of New York, US
ASN AS31822
128.228.254.200
Registrar unknown
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry