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https://clickn.co.kr

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
80
GRADE
B
FIX
1
REVIEW
5
PASS
3
INFO
0
Probed from Santa Clara, United States
301 Moved Permanently
Checks
9
3 PASS 5 REVIEW 1 FIX
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.

B
Redirect Chain
1 redirect(s), 3251 ms total
REVIEW
1 redirect(s), 3251 ms total
Info::
Single redirect
Got: https://clickn.co.kr → https://www.clickn.co.kr/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 3251 ms total
Got: 3251 ms

https://clickn.co.kr

959 ms · HTTP/1.1

301

https://www.clickn.co.kr/

2292 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://clickn.co.kr301959 msHTTP/1.1Apache
2https://www.clickn.co.kr/2002292 msHTTP/1.1Apache

See the visual redirect chain in the HTTP Probe tab →

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
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
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.clickn.co.kr/
200https://clickn.co.kr/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://clickn.co.kr/ → https://www.clickn.co.kr/

Consistent

B
HTTP Probe Timing
Total 979 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
417 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
138 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
281 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
980 ms
Total Time Total request time from DNS lookup through full response.
980 ms

Connection waterfall

DNS Lookup 417 ms TCP Connect 138 ms TLS Handshake 281 ms Server Processing 144 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
190 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

190
days left
0d 30d 60d 90d+

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 Records
1 A records, 425 ms lookup
PASS
1 A records, 425 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 211.47.78.18
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
3 nameserver(s) configured
Got: ns.gabia.co.kr, ns1.gabia.co.kr, ns.gabia.net
Info::
No MX records — email not configured via DNS
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Warning::
DNS resolution is slow (425 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 425 ms
A211.47.78.18
AAAA—
CNAME—
NSns.gabia.co.kr, ns1.gabia.co.kr, ns.gabia.net
MX—
TXT
SPF v=spf1 ip4:139.150.75.218 ip4:139.150.80.191 ip4:139.150.74.158 ip4:139.150.74.1...
CAALookup not available with standard resolver
Resolved in 425 ms

Multiple A records provide failover if one server goes down.

Why this matters

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.

Why this matters

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

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

A+
Crawlability
robots.txt present, sitemap with 20 URLs
PASS
robots.txt present, sitemap with 20 URLs
Info::
robots.txt is present
Got: 139 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 20 entries
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

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 139 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow:/customer/notice/view/1349548663
Disallow:/customer/notice/view/1407087293
Disallow:/customer/notice/view/283621883
sitemap.xml 200 OK
Type URL Set URLs 20 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
clickn.co.kr — via Gabia, Inc.(http://www.gabia.co.kr), hosted on LGDACOM LG DACOM Corporation, KR
PASS
clickn.co.kr — via Gabia, Inc.(http://www.gabia.co.kr), hosted on LGDACOM LG DACOM Corporation, KR
Info::
Registrar: Gabia, Inc.(http://www.gabia.co.kr)
Info::
Registrar lock is enabled
Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.
Info::
Hosting: LGDACOM LG DACOM Corporation, KR
Got: AS3786
Domain expiry

Unknown

SSL certificate

190 days

Issued by Sectigo Limited

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

LGDACOM LG DACOM Corporation, KR

ASN AS3786

211.47.78.18

Registrar

Gabia, Inc.(http://www.gabia.co.kr)

Locked 3 NS records
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Registrar Gabia, Inc.(http://www.gabia.co.kr)
Name Servers ns.gabia.co.kr, ns1.gabia.co.kr, ns.gabia.net
Hosting
IP Address 211.47.78.18
ASN AS3786 (LGDACOM LG DACOM Corporation, KR)
Provider LGDACOM LG DACOM Corporation, KR
Data source: whois (0.7s)

Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.

Why this matters

Registrar lock (clientTransferProhibited et al.) prevents unauthorized domain transfers — strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

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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