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
BCrawlabilityrobots.txt present, sitemap with 0 URLsREVIEW
Search engines may not be able to parse the sitemap. Fix XML validation errors.
An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.
Learn more ▾ ▴
Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.
Source: sitemaps.org / Google Search Central
An empty sitemap provides no value. Add <url> entries for your pages.
An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.
Learn more ▾ ▴
Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.
Source: Google Search Central / sitemaps.org
User-Agent: *
Disallow: /external_assets
Disallow: /about/contact_us
Sitemap: https://www.simonandschuster.com/sitemaps/us/sitemap.xml.gz
BTLS Certificate Expiry & Recommendations315 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
- 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, 76 ms lookupPASS
| A | 44.208.141.18 |
| AAAA | — |
| CNAME | — |
| NS | dns3.p09.nsone.net, dns4.p09.nsone.net, dns1.p09.nsone.net, dns2.p09.nsone.net |
| MX | 10 mxa-0091c601.gslb.pphosted.com 10 mxb-0091c601.gslb.pphosted.com |
| TXT | docusign=01ef374c-ec82-4ead-b9e3-e511ce785627 MS=ms91182265 adobe-idp-site-verification=c75c1751-8015-46ad-8b19-894bd340d3b7 openai-domain-verification=dv-QmUTuTpDc65Ozd9yOxFyMmXe MS=ms41218823 specops-verification-code=875ddb67-eaed-4dfb-81e5-a082652573a6 ZOOM_verify_UauGBYryQ0QwE5K1WXHTpg nl7hmkv2bp1247vpszz8vs19074jmn3y onetrust-domain-verification=d4905f6c011f4edd9cbf8a10f5b4450d google-site-verification=irpwSKEMXmVzZbOjxsImNHlGE1dOmPQLOOwAPSvFMUk jamf-site-verification=V-59GMRXrsCzaAi2eUdOlQ docusign=0995014e-6bb1-40c0-8357-588909747641 MS=ms82767150 teamviewer-sso-verification=bea78b950a9f4515a86dab58d12b156d adobe-idp-site-verification=9b12eeee86b1217caefd9bbbc36da8e767b6c0cca5d2d3bf31c4... atlassian-domain-verification=NX0XJRM8cEb4P5HEYlLZI+xUFM+j6n3Mx6wuVZY/+mMvt5X4/t... zywave-domain-verification=ikgUqthVQn6KTU8aOw0ZZT1/3CjfvFxuyxMOAAkJw5U= SPF v=spf1 ip4:192.238.127.32/30 ip4:204.8.104.37 ip4:204.8.106.38 ip4:204.8.106.36 ... apple-domain-verification=reuBEovZGylS0qgt facebook-domain-verification=nef2zuu0ohigx7bzjmxvpazfdadvtd extensis-domain-verification=9b175cf2-adc6-42c3-9a31-b94c595af8e2 google-site-verification=mctqdq1_EPdoZV-BsYQSOJZvgSpXxSV9-Xsde29ejbc airtable-verification=b1714383409370d45343fc96489b0ba5 A7Yy+d3hgG2WNv6Pj5ORfGJvbaFWntlBhWgww0s5klRnZyW5dkUOknkCG/KUHsxfvsLyIEM9gMeRzt/B... kmpb/AnWYbCTpM2YXYgP/1x1pWtx6zkt9+9VKmL3jKRUiL4Nv88sOHJP97lLvW4W/xlNPq+ITCwZJ3nI... yahoo-verification-key=UjXJbhNgfrDnr8Nks59S0zzYGnX2IDW7/LfcMF+pci8= 6F4FFA5F47273F4F57C94E35064CF6AA1BD4966CF1520436367EB0FB79770A1F appspace-domain-verification=95717daa24b5c09519b505de173a1b8d2d0d37ec64cb70ce7d6... docusign=9859974c-e575-4bc2-9ae9-8a44666e3d75 _pki-validation.simonandschuster.com |
| 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), 797 ms totalPASS
https://simonandschuster.com
297 ms · HTTP/1.1
https://www.simonandschuster.com/
500 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://simonandschuster.com | 301 | 297 ms | HTTP/1.1 | nginx |
| 2 | https://www.simonandschuster.com/ | 200 | 500 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
ADomain Intelligencesimonandschuster.com — via MarkMonitor Inc., 30 years, 4 months old, hosted on AWSPASS
EXPIRED
May 27, 2026
315 days
Issued by Entrust Limited
30 years, 4 months
Registered May 28, 1996
Not enabled
Protects against DNS spoofing
AWS
ASN AS16509
44.208.141.18
MarkMonitor Inc.
Expiry timeline
Recommended actions
- Domain has EXPIRED — renew immediately to avoid total site outage
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Consider enabling auto-renewal to prevent accidental expiration.
Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.
Source: ICANN renewal policy
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