Skip to content
https://ihk.de

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
85
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from New York, United Stated
301 Moved Permanently
Checks
9
5 PASS 3 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.

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.ihk.de/
200https://ihk.de/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://ihk.de/ → https://ihk.de/

Consistent

B
TLS Certificate Expiry & Recommendations
183 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

183
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
1 A records, 612 ms lookup
PASS
1 A records, 612 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 51.38.104.145
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
5 nameserver(s) configured
Got: ns1.ihk.de, b.ns14.net, ns2.ihk.de, d.ns14.net, c.ns14.net
Info::
3 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::
SPF record present in TXT
Warning::
DNS resolution is slow (612 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 612 ms
A51.38.104.145
AAAA—
CNAME—
NSns1.ihk.de, b.ns14.net, ns2.ihk.de, d.ns14.net, c.ns14.net
MX
10 mx04.ihk.de
10 mx01.ihk.de
10 mx02.ihk.de
TXT
MS=ms83214784
fp39i446qc9lcduqbo232jmf32
6beq0m5pkc63dibs00rq4sceoi
MS=ms77180364
google-site-verification=bl47UJtu3ljo-qz_YPHnowFIHFtSeEKtJjOeZsECgRw 
google-site-verification=rWKjXH7OcS6g0B_9I-eIe33qR4sAnGVfaV4FBRJwWHw
QuoVadis=cc229fc2-31d5-46cf-99b4-8755f8d15b5a
_bibk2dty1rl9b8xxf49su31skviq1o3
SPF v=spf1 include:spf.ihk.de -all
98w03303sfjwm1ybpck46lz053fqk7tn
_telesec-domain-validation=319344_2023-04-26_8DNAuW8PJDk9exAoZDrmrMw7cY1EPgTl2TF...
zone-ownership-verification-6f14bcc281926358f57fe293dab2fc8d9846859c934faaf0361a...
google-site-verification=ZpdJpg3fxYXNbxmf7DYVYLRSGdM1MYxDDlzH6adkMAI
google-site-verification=VcUVAb_MqWdVoJkLbJmIg30J6PMsqLRbsf_dqLM9wEU
google-site-verification=TruOAT1Qi1-QryXOiBB9lwBG12Phw7XChlTjEH1xouk
558jhlsbmmw9fb739l0hc4wpcfmzvv4h
_fy91lk6ci9aipoisysyza6ek6f1mlis
google-site-verification=yP_DnHsfI_nCPZpFF4nVRb-ef7gwPLdamZerN29eMVw
D-TRUST=FCFG4JRNKDWURAAUQM9P5O9
_telesec-domain-validation=291447_2021-05-17_6e2yqmJog02avKi0q5aGIO30no60rJ14rJv...
google-site-verification=o4iQp85t9ngMmlC1kiOB39qDPCzCi0iOw2uXl0b5LZ0
8ytfhv1qxsqggbk86rkmckbgcsrvchc6
kttt18ef7lsnh95tiuup8l9r0e
_qfu172249vyqf4m5de429vken7380pm
_telesec-domain-validation=344744_2025-01-21_Dy8MlcQBNYTc1KpqQbNNinfC9cBZMlZ3KQs...
l17yb13fyrs0t2nxpxqknzdqkm5wh7zq
google-site-verification=_LpFRW84PpjUmnCwnOEoexifGPzca4AijvMq2aLXL54
q5pp85pv9r2x87knyz9ynjlf1qgy51t6
_7s16hph4ehvgx8uwwv9rpdky4es74es
7yy4xfk410cqd0xxz49hnndnd91hlhf9
CAALookup not available with standard resolver
Resolved in 612 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
Redirect Chain
1 redirect(s), 831 ms total
PASS
1 redirect(s), 831 ms total
Info::
Single redirect
Got: https://ihk.de → https://www.ihk.de/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 831 ms total
Got: 831 ms

https://ihk.de

379 ms · HTTP/1.1

301

https://www.ihk.de/

452 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://ihk.de301379 msHTTP/1.1nginx
2https://www.ihk.de/200452 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 62 URLs
PASS
robots.txt present, sitemap with 62 URLs
Info::
robots.txt is present
Got: 921 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 62 entries
Info::
Sitemap index with 62 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 921 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *

Disallow: */1000$

Disallow: */1000/$

Disallow: /System/

Disallow: /system/

Disallow: /Ressourcen/

Disallow: /ressourcen/

Disallow: /blueprint/system/

Disallow: /*?print

Disallow: /*?contentId

Disallow: /*?param

Disallow: /*@*

Disallow: /*.jpg$

Disallow: /*shortUrl=*

Allow: /*shortUrl=%2Frobots.txt

Allow: /*shortUrl=%2Fsitemap-tmg

Allow: /*shortUrl=%2Fantrago-tmg

Allow: /*shortUrl=%2Fsitemapvstdb

Allow: /*shortUrl=%2Fsitemapcontent

Disallow: /berlin/?gh_jid

Disallow: /berlin/?irclickid

Disallow: /berlin/?device=

Disallow: /berlin/?ch=

Disallow: /berlin/?&gduid

Disallow: /berlin/?adgroupid=

Disallow: /berlin/?device=

Disallow: /berlin/?trk=

Disallow: /berlin/?gh_src=

Disallow: /berlin/?=ch

Disallow: /berlin/?adgroupid

Disallow: /berlin/?fbclid

sitemap: https://www.ihk.de/blueprint/servlet/resource/blob/7032248/bca94d4c4daffa4d0d9629c330b60db5/sitemap-master-data.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 62 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
ihk.de — hosted on OVH
PASS
ihk.de — hosted on OVH
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.
Info::
Hosting: OVH
Got: AS16276
Domain expiry

Unknown

SSL certificate

183 days

Issued by D-Trust GmbH

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

OVH

ASN AS16276

51.38.104.145

Registrar

Registrar unknown

Unlocked Name servers unknown
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar
Hosting
IP Address 51.38.104.145
ASN AS16276 (OVH, FR)
Provider OVH
Data source: whois (0.5s)

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 379 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
89 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
94 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
102 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
379 ms
Total Time Total request time from DNS lookup through full response.
379 ms

Connection waterfall

DNS Lookup 89 ms TCP Connect 94 ms TLS Handshake 102 ms Server Processing 94 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback