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
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Preferred variant: non-www
HTTP → HTTPS
HTTP version does not redirect to HTTPS
BTLS Certificate Expiry & Recommendations163 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 Records2 A records, 29 ms lookupPASS
| A | 3.217.4.117, 3.225.98.107 |
| AAAA | — |
| CNAME | — |
| NS | ns-887.awsdns-46.net, ns-1513.awsdns-61.org, ns-1728.awsdns-24.co.uk, ns-5.awsdns-00.com |
| MX | 10 aspmx.l.google.com 20 alt1.aspmx.l.google.com 20 alt2.aspmx.l.google.com 30 aspmx2.googlemail.com 30 aspmx3.googlemail.com 30 aspmx4.googlemail.com 30 aspmx5.googlemail.com |
| TXT | google-site-verification=WT1CdNftu8d-JvKoXxJG94mozdVSVoGlGyf07SGnXIA SPF v=spf1 include:_spf.google.com ~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.
A+Redirect ChainNo redirects — direct accessPASS
https://penzu.com
410 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://penzu.com | 200 | 410 ms | HTTP/1.1 | nginx |
A+Crawlabilityrobots.txt present, sitemap with 118 URLsPASS
User-Agent: *
Disallow: /articles/
Disallow: /pad
Disallow: /p/
Disallow: /public
Disallow: /entries
Disallow: /journals
Disallow: /journal/
Disallow: /customize
Disallow: /mobile
Disallow: /app/journals
Disallow: /app/entries
Disallow: /app/journal
Disallow: /app/account
Disallow: /app/lg
Disallow: /app/disable-reminder
Disallow: /app/manage-reminders
Disallow: /app/disable-lookingglass
Disallow: /app/exclude-lookingglass
Disallow: /app/delete-account-confirmation
Disallow: /search
Disallow: /api
Disallow: /promos
Disallow: /m/lite
Disallow: /mobile/minimal_application
Disallow: /settings/disable_reminders
Disallow: /vendor
Disallow: /welcome
Disallow: /terms
Disallow: /privacy
Allow: /
Sitemap: https://penzu.com/sitemap.xml
A+Domain Intelligencepenzu.com — via NameCheap, Inc., 18 years, 6 months old, hosted on AWSPASS
2363 days
January 6, 2033
163 days
Issued by Amazon
18 years, 6 months
Registered January 6, 2008
Not enabled
Protects against DNS spoofing
AWS
ASN AS14618
3.217.4.117
NameCheap, Inc.
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