Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Probed from Singapore, Singapore

302 Found

Checks

3 PASS 4 REVIEW 2 FIX

Redirect Chain

Action

3 redirect(s), 1243 ms total

FIX

3 redirect(s), 1243 ms total

3 redirects before reaching final URL

Each redirect adds latency. Try to minimize the chain to 1 hop.

WWW normalization redirect

Uses 302 (temporary) redirect

If permanent, use 301 instead.

Got: https://tuv.com

Redirect overhead: 1243 ms total

Got: 1243 ms

https://tuv.com

803 ms · HTTP/1.1

302

https://www.tuv.com/

16 ms · HTTP/1.1

301

https://www.tuv.com/greater-china/tw/

409 ms · HTTP/1.1

301

https://www.tuv.com/taiwan/tw/

15 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://tuv.com	302	803 ms	HTTP/1.1	Caddy
2	https://www.tuv.com/	301	16 ms	HTTP/1.1	AkamaiGHost
3	https://www.tuv.com/greater-china/tw/	301	409 ms	HTTP/1.1
4	https://www.tuv.com/taiwan/tw/	200	15 ms	HTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

Each redirect adds latency. Try to minimize the chain to 1 hop.

Why this matters

Redirect chain — each hop adds latency; combine into one redirect where possible.

Source: Google Search Central / web.dev

If permanent, use 301 instead.

Why this matters

302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.

Learn more ▾

Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).

Source: Google Search Central

CDN & Delivery

Action

No CDN detected

FIX

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.

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

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

Domain Intelligence

tuv.com — via InterNetX GmbH, 32 years, 4 months old, hosted on TUEV_RHEINLAND_AS AM GRAUEN STEIN, DE

REVIEW

tuv.com — via InterNetX GmbH, 32 years, 4 months old, hosted on TUEV_RHEINLAND_AS AM GRAUEN STEIN, DE

Domain expires in 28 days

This domain expires on May 21, 2026. Domains that expire accidentally cause complete website downtime. Enable auto-renewal or renew manually now.

Got: Expires May 21, 2026

DNSSEC is enabled

Registrar: InterNetX GmbH

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.

Hosting: TUEV_RHEINLAND_AS AM GRAUEN STEIN, DE

Got: AS42249

Domain expiry

EXPIRED

May 21, 2026

SSL certificate

58 days

Issued by Actalis S.p.A.

Domain age

32 years, 4 months

Registered May 20, 1994

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

TUEV_RHEINLAND_AS AM GRAUEN STEIN, DE

ASN AS42249

195.20.221.164

Registrar

InterNetX GmbH

Unlocked 2 NS records

Expiry timeline

Today

+1 year

Domain expiry SSL expiry Danger zone (≤30 days)

Recommended actions

Domain has EXPIRED — renew immediately to avoid total site outage
Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers

Registrar InterNetX GmbH

Created May 20, 1994 (32 years, 4 months ago)

Expires May 21, 2026 (28 days)

Last Updated May 22, 2025

Name Servers emea-ns1.tuv.com, emea-ns2.tuv.com

DNSSEC Enabled

Hosting

IP Address 195.20.221.164

ASN AS42249 (TUEV_RHEINLAND_AS AM GRAUEN STEIN, DE)

Provider TUEV_RHEINLAND_AS AM GRAUEN STEIN, DE

Data source: rdap (0.8s)

This domain expires on May 21, 2026. Domains that expire accidentally cause complete website downtime. Enable auto-renewal or renew manually now.

Why this matters

Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.

Source: ICANN renewal policy

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

HTTP Probe Timing

Total 802 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

REVIEW

DNS Lookup

312 ms

TCP Connect

162 ms

TLS Handshake

166 ms

Time to First Byte

803 ms

Total Time

803 ms

Connection waterfall

DNS Lookup 312 ms TCP Connect 162 ms TLS Handshake 166 ms Server Processing 163 ms Content Transfer 0 ms

TLS Certificate Expiry & Recommendations

58 days until leaf cert expires — 2 issues to address

REVIEW

Certificate validity

days left

0d 30d 60d 90d+

Recommended actions

Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy

DNS Records

1 A records, 322 ms lookup

PASS

1 A records, 322 ms lookup

Resolves to 1 IPv4 address(es)

Got: 195.20.221.164

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

No IPv6 (AAAA) records

2 nameserver(s) configured

Got: emea-ns2.tuv.com, emea-ns1.tuv.com

2 mail exchanger(s) configured

CAA records not checked

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

SPF record present in TXT

DNS resolution is slow (322 ms)

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

Got: 322 ms

A	195.20.221.164
AAAA	—
CNAME	—
NS	emea-ns2.tuv.com, emea-ns1.tuv.com
MX	10 mxb-0058f602.gslb.pphosted.com 10 mxa-0058f602.gslb.pphosted.com
TXT	D-TRUST=R5EUJU7P8UZZMRG2NJ2873R SPF v=spf1 ip4:195.20.220.192/32 ip4:195.20.220.193/32 ip4:143.244.121.143/32 ip4:10... k25GDPqE/30NvC4Tps78My+UGAl0ZbbvWFNVoqmew1qPScpoT8GGIgeRi/OA7qi/6UNW4GqsbW0w3KKw... atlassian-domain-verification=Mjgapu6byLFHSPGrf/uuiPwJmMKPAXSdF9OXRX7Tt0By6OqEFF... adobe-idp-site-verification=d74fc436-de11-4042-b67e-9dd15385f797 google-site-verification=l4Ek3vyansSus4_7fmcr5R1LQDxc-kAz3tejImKQLxs miro-verification=11229ad7760026997dc67af1d8c0041301e8b555
CAA	Lookup not available with standard resolver

Resolved in 322 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 125 URLs

PASS

robots.txt present, sitemap with 125 URLs

robots.txt is present

Got: 10240 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 125 entries

robots.txt references sitemap

robots.txt 200 OK

Size 10240 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed

User-Agent: *

Sitemap: https://www.tuv.com/technical-data/overview-sitemap.xml

Allow: /

Disallow: */footer.html

Disallow: /.well-known

Disallow: /*?*

Disallow: /*?*wt_mc=*

Disallow: /*?*gclid=*

Disallow: /*?*requestType=*

Disallow: /*?*contact_id=*

Disallow: /*?*elqTrackId=*

Disallow: /*?*verbid=*

Disallow: /*?*term=*

Disallow: /CoreLocationsBackend/locations/getOpeningStatusForLocations

Disallow: /albania/en/forms

Disallow: /albania/en/technical-templates/

Disallow: /algeria/ar/technical-templates/

Disallow: /algeria/en/forms

Disallow: /algeria/en/technical-templates/

Disallow: /algeria/fr/forms

Disallow: /algeria/fr/technical-templates/

Disallow: /api/

Disallow: /argentina/es/forms

Disallow: /argentina/es/technical-templates/

Disallow: /armenia/en/forms

Disallow: /armenia/en/technical-templates/

Disallow: /australia/en/forms

Disallow: /australia/en/technical-templates/

Disallow: /austria/de/forms

Disallow: /austria/de/technical-templates/

Disallow: /bahrain/en/forms

Disallow: /bahrain/en/technical-templates/

Disallow: /bangladesh/en/forms

Disallow: /bangladesh/en/technical-templates/

Disallow: /belgium/fr/forms

Disallow: /belgium/fr/technical-templates/

Disallow: /belgium/nl/forms

Disallow: /belgium/nl/technical-templates/

Disallow: /bolivia/es/forms

Disallow: /bolivia/es/technical-templates/

Disallow: /bosnia-and-herzegowina/en/forms

Disallow: /bosnia-and-herzegowina/en/technical-templates/

Disallow: /brasil/br/technical-templates/

Disallow: /brasil/pt/forms

Disallow: /bulgaria/bg/technical-templates/

Disallow: /bulgaria/en/forms

Disallow: /bulgaria/en/technical-templates/

Disallow: /cambodia/en/forms

Disallow: /cambodia/en/technical-templates/

Disallow: /canada/en/forms

Disallow: /canada/en/technical-templates/

Disallow: /cgi-bin

Disallow: /chile/es/forms

Disallow: /chile/es/technical-templates/

Disallow: /colombia/es/forms

Disallow: /colombia/es/technical-templates/

Disallow: /content-media-files/germany/bs-industrial-service/pdfs/roter_faden/de22_i0x_2200240_roter-faden-broschure_web.pdf 

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_0_8_1.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_1920px_x.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_1_1.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_1_5_1.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_1_x.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_1_x.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_2_1.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_2_2_1.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_2_3.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_2_3_1.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_2_5_1.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_350px_x.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_400px_300px.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_4_3.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_core_8_3.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/mitgliedersignet_pressareapreview.jpg

Disallow: /content-media-files/germany/images/organisation-und-gremien/tuv_r_trbbpev_mitgliedersignet_nutzungsrechte.pdf

Disallow: /counter1.wt.twt.de

Disallow: /croatia/en/forms

Disallow: /croatia/en/technical-templates/

Disallow: /czech-republic/en/forms

Disallow: /czech-republic/en/technical-templates/

Disallow: /egypt/ar/technical-templates/

Disallow: /egypt/en/forms

Disallow: /egypt/en/technical-templates/

Disallow: /france/fr/forms

Disallow: /france/fr/technical-templates/

Disallow: /germany/de/forms

Disallow: /germany/de/lp/academy-lifecare/arbeitsmarktdienstleistungen/main-navigation/t%C3%BCv-rheinland-akademie/index.jsp

Disallow: /germany/de/lp/academy-lifecare/arbeitsmarktdienstleistungen/main-navigation/tüv-rheinland-akademie/caruso-template.jsp

Disallow: /germany/de/technical-templates/

Disallow: /greater-china/cn/forms

Disallow: /greater-china/cn/technical-templates/

Disallow: /greater-china/en/forms

Disallow: /greater-china/en/technical-templates/

Disallow: /greater-china/tw/forms

Disallow: /hungary/en/forms

Disallow: /hungary/en/technical-templates/

Disallow: /hungary/hu/technical-templates/

Disallow: /india/en/forms

Disallow: /india/en/technical-templates/

Disallow: /indonesia/en/forms

Disallow: /indonesia/en/technical-templates/

Disallow: /indonesia/id/technical-templates/

Disallow: /iraq/ar/technical-templates/

Disallow: /iraq/en/technical-templates/

Disallow: /italy/en/forms

Disallow: /italy/en/technical-templates/

Disallow: /italy/it/technical-templates/

Disallow: /japan/en/forms

Disallow: /japan/en/technical-templates/

Disallow: /japan/jp/forms

Disallow: /japan/jp/technical-templates/

Disallow: /jordan/en/forms

Disallow: /jordan/en/technical-templates/

Disallow: /kazakhstan/en/forms

Disallow: /kazakhstan/en/technical-templates/

Disallow: /korea/ko/forms

Disallow: /korea/ko/technical-templates/

Disallow: /kuwait/ar/technical-templates/

Disallow: /kuwait/en/forms

Disallow: /kuwait/en/technical-templates/

Disallow: /landingpage/ar/hc/

Disallow: /landingpage/bg/hc/

Disallow: /landingpage/ca/hc/

Disallow: /landingpage/cn/hc/

Disallow: /landingpage/cs/hc/

Disallow: /landingpage/de/hc/

Disallow: /landingpage/en/hc/

Disallow: /landingpage/es/hc/

Disallow: /landingpage/eu/hc/

Disallow: /landingpage/fr/hc/

Disallow: /landingpage/hu/hc/

Disallow: /landingpage/id/hc/

Disallow: /landingpage/it/hc/

Disallow: /landingpage/jp/hc/

Disallow: /landingpage/ko/hc/

Disallow: /landingpage/nl/hc/

Disallow: /landingpage/pl/hc/

Disallow: /landingpage/pt/hc/

Disallow: /landingpage/ro/hc/

Disallow: /landingpage/ru/hc/

Disallow: /landingpage/tr/hc/

Disallow: /landingpage/tw/hc/

Disallow: /landingpage/vi/hc/

Disallow: /lanndingpage/br/hc/

Disallow: /latvia/en/forms

Disallow: /latvia/en/technical-templates/

Disallow: /lebanon/en/forms

Disallow: /lebanon/en/technical-templates/

Disallow: /luxembourg/de/forms

Disallow: /luxembourg/de/technical-templates/

Disallow: /luxembourg/en/forms

Disallow: /luxembourg/en/technical-templates/

Disallow: /macedonia/en/forms

Disallow: /macedonia/en/technical-templates/

Disallow: /malaysia/en/forms

Disallow: /malaysia/en/technical-templates/

Disallow: /mexico/es/forms

Disallow: /mexico/es/technical-templates/

Disallow: /morocco/ar/technical-templates/

Disallow: /morocco/en/forms

Disallow: /morocco/en/technical-templates/

Disallow: /morocco/fr/forms

Disallow: /morocco/fr/technical-templates/

Disallow: /myanmar/en/forms

Disallow: /myanmar/en/technical-templates/

Disallow: /netherlands/en/forms

Disallow: /netherlands/en/technical-templates/

Disallow: /netherlands/nl/forms

Disallow: /netherlands/nl/technical-templates/

Disallow: /oman/ar/technical-templates/

Disallow: /oman/en/forms

Disallow: /oman/en/technical-templates/

Disallow: /peru/es/forms

Disallow: /peru/es/technical-templates/

Disallow: /philippines/en/forms

Disallow: /philippines/en/technical-templates/

Disallow: /poland/pl/forms

Disallow: /poland/pl/technical-templates/

Disallow: /portugal/en/forms

Disallow: /portugal/en/technical-templates/

Disallow: /portugal/pt/forms

Disallow: /preview

Disallow: /qatar/ar/technical-templates/

Disallow: /qatar/en/forms

Disallow: /qatar/en/technical-templates/

Disallow: /romania/en/forms

Disallow: /romania/en/technical-templates/

Disallow: /romania/ro/technical-templates/

Disallow: /russia/en/forms

Disallow: /russia/en/technical-templates/

Disallow: /russia/ru/forms

Disallow: /russia/ru/technical-templates/

Disallow: /saudi-arabia/ar/technical-templates/

Disallow: /saudi-arabia/en/forms

Disallow: /saudi-arabia/en/technical-templates/

Disallow: /serbia/en/forms

Disallow: /serbia/en/technical-templates/

Disallow: /singapore/en/forms

Disallow: /singapore/en/technical-templates/

Disallow: /slovakia/en/forms

Disallow: /slovakia/en/technical-templates/

Disallow: /south-africa/en/forms

Disallow: /south-africa/en/technical-templates/

Disallow: /spain/ca/forms

Disallow: /spain/ca/technical-templates/

Disallow: /spain/es/forms

Disallow: /spain/es/technical-templates/

Disallow: /sweden/en/forms

Disallow: /sweden/en/technical-templates/

Disallow: /switzerland/de/forms

Disallow: /switzerland/de/technical-templates/

Disallow: /taiwan/en/technical-templates/

Disallow: /taiwan/tw/technical-templates/

Disallow: /technical-data

Disallow: /test-tuvweb.twt.de

Disallow: /thailand/en/forms

Disallow: /thailand/en/technical-templates/

Disallow: /tunesia/ar/technical-templates/

Disallow: /tunesia/en/forms

Disallow: /tunesia/en/technical-templates/

Disallow: /tunesia/fr/forms

Disallow: /tunesia/fr/technical-templates/

Disallow: /turkey/en/forms

Disallow: /turkey/en/technical-templates/

Disallow: /turkey/tr/technical-templates/

Disallow: /united-arab-emirates/ar/technical-templates/

Disallow: /united-arab-emirates/en/forms

Disallow: /united-arab-emirates/en/technical-templates/

Disallow: /united-kingdom/en/forms

Disallow: /united-kingdom/en/technical-templates/

Disallow: /usa/en/forms

Disallow: /usa/en/technical-templates/

Disallow: /vietnam/en/forms

Disallow: /vietnam/en/technical-templates/

Disallow: /vietnam/vi/technical-templates/

Disallow: /web

Disallow: /web/class/captcha

Disallow: /web/media_get.php

Disallow: /world/en/adyen

Disallow: /world/en/forms

Disallow: /world/en/internal-redirect

Disallow: /world/en/technic

sitemap.xml 200 OK

Type URL Set URLs 125 entries Valid XML Yes

Sample URLs:

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

PASS

www/non-www, trailing slash, HTTP→HTTPS

www/non-www redirect configured correctly (preferred: non-www)

HTTP→HTTPS redirect uses 302 instead of 301

Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

301https://www.tuv.com/

200https://tuv.com/

Preferred variant: non-www

HTTP → HTTPS

308http://tuv.com/ → https://tuv.com/

Use 301 (permanent) instead of 302 (temporary)

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.