Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.FIPv6 ReadinessActionIPv6 records exist but unreachableFIX
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.
Learn more ▾ ▴
Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.
Source: RFC 8305 (Happy Eyeballs)
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations69 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, 34 ms lookupPASS
| A | 23.185.0.4 |
| AAAA | 2620:12a:8000::4, 2620:12a:8001::4 |
| CNAME | — |
| NS | ns-1334.awsdns-38.org, ns-1775.awsdns-29.co.uk, ns-469.awsdns-58.com, ns-527.awsdns-01.net |
| MX | 0 zend-com.mail.protection.outlook.com |
| TXT | 22d51d32a5ad44079350bebe324dd696 5s5hnv94wx9b8x9lhyg687djhq26r1py 92x7z9lhv8j2hzc116y7cdvkm91nxkwn MS=ms61457972 _4rflu04mhac8w0de7c2m5mdf3fjb4eg _globalsign-domain-verification=tDpjRBlQKPJriM7MhZaiyDFo5DP19cB3Q0c90JSPXC _ygkt6ikz7zosy8ikfn48bc8nt6qaecj atlassian-domain-verification=WWV/wmTQYmA2v9blKsWITEK6VAGGN73TYT6for2TkYHEDOc45g... b2gc7s0jcf43t1mn6lj8n4spn8ffmltj docusign=779bfc01-16a2-4404-9e4b-e5b14f6d45d6 google-site-verification=HUMMORzJHziR5dbEOBevsBowsa8FheTbzZzJ7gDwtNk google-site-verification=O8EgAssHI0cSXcmCRLwJRNuZB0UGQ_IlM7lDCw6EZeU SPF v=spf1 ip4:212.199.177.64/27 ip4:173.203.18.211 ip4:184.106.88.78 include:spf.pr... |
| 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), 93 ms totalPASS
https://zend.com
38 ms · HTTP/1.1
https://www.zend.com/
54 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://zend.com | 301 | 38 ms | HTTP/1.1 | Pantheon |
| 2 | https://www.zend.com/ | 200 | 54 ms | HTTP/1.1 | nginx |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 8 URLsPASS
User-agent: *
Disallow: /events/longhorn-php-promo
# SLA
Disallow: /sites/zend/files/pdfs/comparison-chart-zend-production-support-sla.pdf
Sitemap: https://www.zend.com/index/sitemap.xml
#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used: http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html
User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed
# Disallow Specific Query String Parameters
Disallow: /*&utm_source*
Disallow: /*&utm_medium*
Disallow: /*&utm_campaign*
Disallow: /*&utm_content*
Disallow: /*&utm_leadersource*
Disallow: /*&field=*
Disallow: /*?utm_source*
Disallow: /*?utm_medium*
Disallow: /*?utm_campaign*
Disallow: /*?utm_content*
Disallow: /*?utm_leadersource*
Disallow: /*?field=*
Disallow: /*?field_*
Disallow: /*?replytocom=*
Disallow: /*?hsFormKey=*
Disallow: /*?wvideo=*
Disallow: /*?wtime=*
Disallow: /*?goback=*
Disallow: /*??*
Disallow: /*?gni=*
Disallow: /*?fromStream=*
Disallow: /*?gnk=*
Disallow: /*?hsCtaTracking=*
Disallow: /*?(RoW2)=*
Disallow: /*?mkt_tok=*
Disallow: /*?r=*
Disallow: /*?__hstc=*
Disallow: /*?trk=*
Disallow: /*?nonamp=*
Disallow: /*?NA=*
Disallow: /*?(NA)=*
Disallow: /*?ref=*
Disallow: /*?hss_channel=*
Disallow: /*?PRID=*
Disallow: /*?sc=*
Disallow: /*?paper=*
Disallow: /*?platform=*
Disallow: /*?path=*
Disallow: /*?Gen-MD=*
Disallow: /*?source=*
Disallow: /*?v=*
Disallow: /*?en-=*
Disallow: /*?mgs1=*
Disallow: /*?examples=*
Disallow: /*?turl=*
Disallow: /*?EntryId=*
Disallow: /search/results?*
Disallow: /success/*
Disallow: /user/*
# Marketo Forms
Disallow: /marketo/form/perforce_marketo_form/*
- https://www.zend.com/blog/sitemap.xml
- https://www.zend.com/customer/sitemap.xm...
- https://www.zend.com/sitemap.xml
- https://www.zend.com/event/sitemap.xml
- https://www.zend.com/homepage/sitemap.xm...
- https://www.zend.com/landing-page/sitema...
- https://www.zend.com/resource/sitemap.xm...
- https://www.zend.com/webinar/sitemap.xml
A+Domain Intelligencezend.com — via GoDaddy.com, LLC, 27 years, 9 months old, hosted on FastlyPASS
151 days
December 13, 2026
69 days
Issued by Let's Encrypt
27 years, 9 months
Registered December 14, 1998
Not enabled
Protects against DNS spoofing
Fastly
ASN AS54113
23.185.0.4
GoDaddy.com, 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