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.
BDNS Records10 A records, 351 ms lookupREVIEW
| A | 47.246.45.183, 155.102.46.10, 47.246.45.235, 47.246.45.180, 47.246.45.186, 47.246.45.181, 47.246.45.185, 47.246.45.182, 155.102.214.148, 47.246.45.179 |
| AAAA | — |
| CNAME | juejin.cn.w.cdngslb.com |
| NS | — |
| MX | — |
| TXT | — |
| CAA | Lookup not available with standard resolver |
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
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.
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'.
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)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.
Source: DNS performance benchmarks
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
BHTTP Probe TimingTotal 1044 ms — DNS, TCP, TLS, TTFB, content transfer breakdownREVIEW
Connection waterfall
BTLS Certificate Expiry & Recommendations271 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+Redirect ChainNo redirects — direct accessPASS
https://juejin.cn
398 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://juejin.cn | 200 | 398 ms | HTTP/1.1 | Tengine |
A+Crawlabilityrobots.txt present, sitemap with 53 URLsPASS
User-agent: *
Disallow: /subscribe/subscribed
Disallow: /user/settings
Disallow: /drafts
Disallow: /news-drafts
Disallow: /editor
Disallow: /oauth-result
Disallow: /search
Disallow: /s/
Disallow: /equation
Disallow: /book/order
Disallow: /books/payment
Disallow: /appview
Disallow: /creator
Disallow: /notification
Disallow: /translate
Disallow: /zhuanlan
Disallow: /spost
Sitemap: https://juejin.cn/sitemap/posts/index.xml
Sitemap: https://juejin.cn/sitemap/user/index.xml
Sitemap: https://juejin.cn/sitemap/news/index.xml
Sitemap: https://juejin.cn/sitemap/columns/index.xml
Sitemap: https://juejin.cn/sitemap/tag/index.xml
Sitemap: https://juejin.cn/sitemap/pin/index.xml
Sitemap: https://juejin.cn/sitemap/collections/index.xml
Sitemap: https://juejin.cn/sitemap/user_posts/index.xml
Sitemap: https://juejin.cn/sitemap/user_pins/index.xml
- https://juejin.cn/sitemap/posts/index1.x...
- https://juejin.cn/sitemap/posts/index2.x...
- https://juejin.cn/sitemap/posts/index3.x...
- https://juejin.cn/sitemap/posts/index4.x...
- https://juejin.cn/sitemap/posts/index5.x...
- https://juejin.cn/sitemap/posts/index6.x...
- https://juejin.cn/sitemap/posts/index7.x...
- https://juejin.cn/sitemap/posts/index8.x...
- https://juejin.cn/sitemap/posts/index9.x...
- https://juejin.cn/sitemap/posts/index10....
- https://juejin.cn/sitemap/posts/index11....
- https://juejin.cn/sitemap/posts/index12....
- https://juejin.cn/sitemap/posts/index13....
- https://juejin.cn/sitemap/posts/index14....
- https://juejin.cn/sitemap/posts/index15....
- https://juejin.cn/sitemap/posts/index16....
- https://juejin.cn/sitemap/posts/index17....
- https://juejin.cn/sitemap/posts/index18....
- https://juejin.cn/sitemap/posts/index19....
- https://juejin.cn/sitemap/posts/index20....
- https://juejin.cn/sitemap/posts/index21....
- https://juejin.cn/sitemap/posts/index22....
- https://juejin.cn/sitemap/posts/index23....
- https://juejin.cn/sitemap/posts/index24....
- https://juejin.cn/sitemap/posts/index25....
- https://juejin.cn/sitemap/posts/index26....
- https://juejin.cn/sitemap/posts/index27....
- https://juejin.cn/sitemap/posts/index28....
- https://juejin.cn/sitemap/posts/index29....
- https://juejin.cn/sitemap/posts/index30....
- https://juejin.cn/sitemap/posts/index31....
- https://juejin.cn/sitemap/posts/index32....
- https://juejin.cn/sitemap/posts/index33....
- https://juejin.cn/sitemap/posts/index34....
- https://juejin.cn/sitemap/posts/index35....
- https://juejin.cn/sitemap/posts/index36....
- https://juejin.cn/sitemap/posts/index37....
- https://juejin.cn/sitemap/posts/index38....
- https://juejin.cn/sitemap/posts/index39....
- https://juejin.cn/sitemap/posts/index40....
- https://juejin.cn/sitemap/posts/index41....
- https://juejin.cn/sitemap/posts/index42....
- https://juejin.cn/sitemap/posts/index43....
- https://juejin.cn/sitemap/posts/index44....
- https://juejin.cn/sitemap/posts/index45....
- https://juejin.cn/sitemap/posts/index46....
- https://juejin.cn/sitemap/posts/index47....
- https://juejin.cn/sitemap/posts/index48....
- https://juejin.cn/sitemap/posts/index49....
- https://juejin.cn/sitemap/posts/index50....
- https://juejin.cn/sitemap/posts/index51....
- https://juejin.cn/sitemap/posts/index52....
- https://juejin.cn/sitemap/posts/index53....
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligencejuejin.cn — via 厦门易名科技股份有限公司, 19 years, 9 months old, hosted on TAOBAO Zhejiang Taobao Network Co.,Ltd, CNPASS
80 days
October 28, 2026
271 days
Issued by DigiCert Inc
19 years, 9 months
Registered October 28, 2006
Status unknown
Protects against DNS spoofing
TAOBAO Zhejiang Taobao Network Co.,Ltd, CN
ASN AS24429
155.102.46.10
厦门易名科技股份有限公司
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.
Registrar lock (clientTransferProhibited et al.) prevents unauthorized domain transfers — strongest defense against domain hijacking.
Source: ICANN / domain-security best practice