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https://dzwww.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
83
GRADE
B
FIX
2
REVIEW
2
PASS
5
INFO
0
Probed from New York, United Stated
200 OK
Checks
9
5 PASS 2 REVIEW 2 FIX
D
URL Variants
Action
www/non-www, trailing slash, HTTP→HTTPS
FIX
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Critical::
HTTP version does not redirect to HTTPS
Got: HTTP 200 Expected: 301 redirect to HTTPS

www / non-www

200https://www.dzwww.com/
200https://dzwww.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

200http://dzwww.com/

HTTP version does not redirect to HTTPS

D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

C
Crawlability
Action
robots.txt present, sitemap with 0 URLs
REVIEW
robots.txt present, sitemap with 0 URLs
Info::
robots.txt is present
Got: 72 bytes
Info::
sitemap.xml is present
Warning::
sitemap.xml contains invalid XML
Search engines may not be able to parse the sitemap. Fix XML validation errors.
Warning::
sitemap.xml is empty — no URLs found
An empty sitemap provides no value. Add <url> entries for your pages.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

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.

Why this matters

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

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 72 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed
# robots.txt for www.dzwww.com
User-agent: *
Allow: /
Disallow: /falv/


sitemap.xml 200 OK
Type URL Set URLs 0 entries Valid XML No
B
TLS Certificate Expiry & Recommendations
308 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

308
days left
0d 30d 60d 90d+

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 Records
3 A records, 133 ms lookup
PASS
3 A records, 133 ms lookup
Info::
Resolves to 3 IPv4 address(es)
Got: 157.185.170.135, 138.113.241.54, 140.150.29.92
Info::
Has 3 IPv6 (AAAA) record(s)
Got: 2606:1980:6::f4, 2607:3f40:ff08::6e, 2606:1980:6::f3
Warning::
CNAME record at zone apex
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
Got: dzwww.com.wswebcdn.com
Info::
2 nameserver(s) configured
Got: vip4.alidns.com, vip3.alidns.com
Info::
1 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
No SPF record found in TXT records
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Info::
DNS resolution time: 133 ms
Got: 133 ms
A157.185.170.135, 138.113.241.54, 140.150.29.92
AAAA2606:1980:6::f4, 2607:3f40:ff08::6e, 2606:1980:6::f3
CNAMEdzwww.com.wswebcdn.com
NSvip4.alidns.com, vip3.alidns.com
MX
10 mail.dzwww.com
TXT
CAALookup not available with standard resolver
Resolved in 133 ms

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.

Learn more

RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.

Source: RFC 1034

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more

SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.

Source: RFC 7208 (SPF)

A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://dzwww.com

https://dzwww.com

191 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://dzwww.com200191 msHTTP/1.1nginx
A+
IPv6 Readiness
IPv6 reachable (2 ms)
PASS
IPv6 reachable (2 ms)
Info::
IPv6 is configured and reachable at 2606:1980:6::f4, 2607:3f40:ff08::6e, 2606:1980:6::f3
Got: 2 ms connect
IPv6 Ready
AAAA Records 2606:1980:6::f4, 2607:3f40:ff08::6e, 2606:1980:6::f3 Connection Reachable (2 ms)
A+
Domain Intelligence
dzwww.com — via Xiamen 35.com Information Co., Ltd., 25 years, 10 months old
PASS
dzwww.com — via Xiamen 35.com Information Co., Ltd., 25 years, 10 months old
Info::
Domain registered until Oct 25, 2031 (5 years, 7 months remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: Xiamen 35.com Information Co., Ltd.
Warning::
Registrar lock is NOT enabled
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.
Domain expiry

1930 days

October 25, 2031

SSL certificate

308 days

Issued by DigiCert, Inc.

Domain age

25 years, 10 months

Registered October 25, 2000

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2606:1980:6::f4

Registrar

Xiamen 35.com Information Co., Ltd.

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar Xiamen 35.com Information Co., Ltd.
Created October 25, 2000 (25 years, 10 months ago)
Expires October 25, 2031 (5 years, 7 months)
Last Updated October 9, 2024
Name Servers vip3.alidns.com, vip4.alidns.com
DNSSEC Not enabled
Hosting
IP Address 2606:1980:6::f4
Data source: rdap (0.1s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

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.

Why this matters

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

A
HTTP Probe Timing
Total 685 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
72 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
7 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
9 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
630 ms
Total Time Total request time from DNS lookup through full response.
686 ms

Connection waterfall

DNS Lookup 72 ms TCP Connect 7 ms TLS Handshake 9 ms Server Processing 543 ms Content Transfer 56 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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