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
134 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
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