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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
80
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Sao Paulo, Brazil
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
F
IPv6 Readiness
Action
IPv6 records exist but unreachable
FIX
IPv6 records exist but unreachable
Warning::
IPv6 DNS records exist but server is not reachable
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Got: 2603:1061:14:122::1
Info::
IPv6 connection error
Got: dial tcp6 [2603:1061:14:122::1]:443: connect: no route to host
IPv6 Misconfigured
AAAA Records 2603:1061:14:122::1 Connection UNREACHABLE

Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.

Why this matters

Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.

Learn more ▾

Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.

Source: RFC 8305 (Happy Eyeballs)

B
Redirect Chain
2 redirect(s), 327 ms total
REVIEW
2 redirect(s), 327 ms total
Warning::
2 redirects before reaching final URL
Each redirect adds latency. Try to minimize the chain to 1 hop.
Info::
WWW normalization redirect
Info::
Uses 302 (temporary) redirect
If permanent, use 301 instead.
Got: https://www.microsoft.com/

https://microsoft.com

41 ms · HTTP/1.1

301

https://www.microsoft.com/

34 ms · HTTP/1.1

302

https://www.microsoft.com/pt-br

252 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://microsoft.com30141 msHTTP/1.1
2https://www.microsoft.com/30234 msHTTP/1.1
3https://www.microsoft.com/pt-br200252 msHTTP/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

B
TLS Certificate Expiry & Recommendations
179 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

179
days left
0d 30d 60d 90d+

Recommended actions

  • Add includeSubDomains to the HSTS directive
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • 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
B
CDN & Delivery
Azure CDN (CONFIG_NOCACHE)
REVIEW
Azure CDN (CONFIG_NOCACHE)
Info::
Site is served via Azure CDN CDN
Got: x-azure-ref: 20260416T165506Z-1566c7cfb4b5mbw8hC1CPQ90e800000002s00000000042a6
Info::
CDN cache status: CONFIG_NOCACHE
CDN Detected: Azure CDN
Provider Azure CDN Cache Status CONFIG_NOCACHE Evidence x-azure-ref: 20260416T165506Z-1566c7cfb4b5mbw8hC1CPQ90e800000002s00000000042a6
A+
DNS Records
1 A records, 10 ms lookup
PASS
1 A records, 10 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 150.171.110.40
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2603:1061:14:122::1
Info::
4 nameserver(s) configured
Got: ns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info
Info::
1 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
Info::
DNS resolution time: 10 ms
Got: 10 ms
A150.171.110.40
AAAA2603:1061:14:122::1
CNAME—
NSns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info
MX
10 microsoft-com.mail.protection.outlook.com
TXT
d365mktkey=3uc1cf82cpv750lzk70v9bvf2
facebook-domain-verification=fwzwhbbzwmg5fzgotc2go51olc3566
google-site-verification=pjPOauSPcrfXOZS9jnPPa5axowcHGCDAl1_86dCqFpk
fg2t0gov9424p2tdcuo94goe9j
t7sebee51jrj7vm932k531hipa
google-site-verification=M--CVfn_YwsV-2FGbCp_HFaEj23BmT0cTF4l8hXgpvM
google-site-verification=GfDnTUdATPsK1230J0mXbfsYw-3A9BVMVaKSd4DcKgI
d365mktkey=SxDf1EZxLvMwx6eEZUxzjFFgHoapF8DvtWEUjwq7ZTwx
hubspot-developer-verification=OTQ5NGIwYWEtODNmZi00YWE1LTkyNmQtNDhjMDMxY2JjNDAx
d365mktkey=QDa792dLCZhvaAOOCe2Hz6WTzmTssOp1snABhxWibhMx
d365mktkey=6358r1b7e13hox60tl1uagv14
google-site-verification=uFg3wr5PWsK8lV029RoXXBBUW0_E6qf1WEWVHhetkOY
docusign=d5a3737c-c23c-4bd0-9095-d2ff621f2840
d365mktkey=j2qHWq9BHdaa3ZXZH8x64daJZxEWsFa0dxDeilxDoYYx
atlassian-domain-verification=xvoaqRfxSg3PnlVnR4xCSOlKyw1Aln0MMxRiKXnwWroFG7vI76...
workplace-domain-verification=lK0QDLk73xymCYMKUXNpfKAT8TY5Mx
google-site-verification=uhh5_jbxpcQgnb-A7gDIjlrr5Ef34lA2t2_BAveYpnk
MS=ms79629062
d365mktkey=3l6dste9txazu0Qd2zu4135PUB4E35txLxyzJxjkPbsx
d365mktkey=wbU64GRacxVEQxwcLSQnx0zisXLYzgUbfvsufIqO9ZUx
linear-domain-verification=iuq6saifcnbe
d365mktkey=ZGFU0tlXPekPusNHPo5QQQWpVf0gic0xpuKroNy3NQEx
d365mktkey=JlXV17lfZjyvWxNje1qiP390ACSKzTxo5mGqZ3V2BmYx
google-site-verification=mEAmcTy1e8jIB9W6ENPk2GDg9hjuNytQQRGlK0hPm0c
d365mktkey=PNcDqkW71x8VOUhcE96aGM4l5PYX1gnlRl6ieXUl5eMx
d365mktkey=Fu49WtSTeClkHtK7S14227RIVpGwwGrzEsO6RVs1I2Ax
ms-domain-verification=25524f4b-1476-489c-a086-30f4c5016ecc
ms-domain-verification=1c4e4677-e58f-4117-8d61-e5b2810388c2
mixpanel-domain-verify=5803bc4c-5bb6-4ce1-8076-753800097373
sitecore-domain-verification=1d46cb5467624e33a408d14324874088
ms-domain-verification=478640ad-6524-43d5-86c4-a914804b9e93
ms-domain-verification=561512fc-b4ba-4ac7-a946-e464c8f49f1b
_zx2p8gpzv720db2aqmozy4jhwk2nl43
airtable-verification=79a09e4a8013ff5737798ffb4ea88eee
1password-site-verification=35ZTURTFFFDC5BW7GFQKRJ77QM
d365mktkey=8fEQahTresJms7tZGxGFr94T1zDz36oCbUt1LJc99mox
d365mktkey=heYmJ57sWrwMjCgIG1xRwTREJrQokUIDtBcNfGuxoWQx
ms-domain-verification=d6545068-89f7-4432-b947-0b137e8a9fe3
hcp-domain-verification=3ce174a8b9fba88909633ab13eb1d81ce0123454745d66e500052ed8...
v=MCPv1; k=ecdsap384; p=As/XxnDWZFxFwHvRZj+HbG5/ImtAeabLkiOWu1h7wCJQFAR216E9HoYQ...
v=MCPv1; k=ecdsap384; p=AoHTKEi2W8L2P8cf9CoDicIxYiuttTkwtIeFOqYCewBGoRZiiF+9/92s...
SPF v=spf1 include:_spf-a.microsoft.com include:_spf-b.microsoft.com include:_spf-c....
ms-domain-verification=65f91178-9dfb-41cd-929d-08d1a38ed607
v=MCPv1; k=ecdsap384; p=Asc8WWov6gsmCCzn4CSrwRuJIh5SqvaitKz/LlTW+SD54lLC52wzcnWh...
liveramp-site-verification=kxcV8fDH_FUNUZQEcAO6lwgim47f_hNLgMP4VG0PF_Q
v=MCPv1; k=ecdsap384; p=AqXeTHJ/1FCYeuvJ8dc1B+X3uHaa7m2W0s31vzL4opnrJlSaBdtbWTY8...
v=MCPv1; k=ecdsap384; p=An4mJIFLRys9h1EvjX18SJs5p1uEF5MHcs2JJLYPrI48C5Qt9FpaZEM0...
v=MCPv1; k=ecdsap384; p=A/Mf6IKdZzcHfBvpiVz9rkdPTIcCP5IbRDdEkeP3PgXEXF3mNjorahOw...
v=MCPv1; k=ecdsap384; p=A8qndBCDJGtFF2+3v/IPIMmM0SaVcrJBoSue7rKob6sUeK7QGeFuWkrt...
zoom-domain-verification=ZOOM_verify_e97a3d385acb4c47b9b924609a280524
anthropic-domain-verification-phksss=GZrrKDUR4klRLFCvxyOvqcNGE
v=MCPv1; k=ecdsap384; p=Al9O7vaY4u02Vzh6c6i9ie3AFUHq9j3VK9rFROTJsCx5Rh0ailSEc3/k...
v=MCPv1; k=ecdsap384; p=Atv9t87le3AkxabGQAy75Wju8M3YATC1mPNp/3BQepwz5KS+4VwTtTq7...
v=MCPv1; k=ecdsap384; p=Azw9+u4M8RoH+bxJidKAZzGDmsPkzY1N4cO7rB/uC5x1RBoNfMyBlH/o...
dobtdihqagnr18hea8uv1h1mvq
atlassian-domain-verification=Sn5AwyIdVgkaRaJA/IKj7ZFMnWeCBnppa9bXGLuJvsakRHH4lY...
v=MCPv1; k=ecdsap384; p=A8a5Z0fMroXSzLT+NXb33SxWJZ7UTZdFO3qcknLCGeGpLOLeFpxT4Yam...
openai-domain-verification=dv-sFtCvKOlWoe31gpoSvs7cqsP
CAALookup not available with standard resolver
Resolved in 10 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.

A+
Crawlability
robots.txt present, sitemap with 5 URLs
PASS
robots.txt present, sitemap with 5 URLs
Info::
robots.txt is present
Got: 7565 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 5 entries
Info::
Sitemap index with 5 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 7565 B Sitemaps referenced 22 User-agents * Blocking No — crawling allowed
# Robots.txt file for www.microsoft.com v2.05


User-agent: *

Disallow: /*/store/locations/store-locations-sitemap.xml

Disallow: /en-us/windows/si/matrix.html

Disallow: /en-us/windows/si/matrix.html

Disallow: /*/security/search-results.aspx?

Disallow: /*/music/*/search/

Disallow: /*/store/buynow?

Disallow: /*/store/cart

Disallow: /store/buy/cartcount

Disallow: /*/search/

Disallow: /*/music/*/Search/

Disallow: /*/Search/

Disallow: /*/newsearch/

Disallow: *action=catalogsearch&

Disallow: /*/store/d/groove-music-pass/cfq7ttc0k5dq/0001

Disallow: /*/store/best-rated/*?*&*&*

Disallow: /*/store/best-selling/*?*&*&*

Disallow: /*/store/coming-soon/*?*&*&*

Disallow: /*/store/deals/*?*&*&*

Disallow: /*/store/game-demos/*?*&*&*

Disallow: /*/store/game-previews/*?*&*&*

Disallow: /*/store/most-played/*?*&*&*

Disallow: /*/store/most-popular/*?*&*&*

Disallow: /*/store/new/*?*&*&*

Disallow: /*/store/new-and-rising/*?*&*&*

Disallow: /*/store/top-free/*?*&*&*

Disallow: /*/store/top-paid/*?*&*&*

Disallow: /*/store/collections/helpmechoosepc?*&*&*

Disallow: /*/store/collections/helpmechoosepc/?*&*&*

Disallow: /*/store/movies-and-tv/*?*&*&*

Disallow: /cascadeauth/microsoft-365/account/silentauth

Disallow: /*/microsoft-365/site-search

Disallow: /news/search

Disallow: /video/search

Allow: /*/store/*/search/

Allow: /*/store/*/layout/

Allow: /*/store/music/groove-music-pass/*

Allow: *action=catalogsearch&catalog_mode=grid&page=2$

Allow: *action=catalogsearch&catalog_mode=grid&page=3$

Allow: *action=catalogsearch&catalog_mode=grid&page=4$

Allow: *action=catalogsearch&catalog_mode=grid&page=5$

Allow: *action=catalogsearch&catalog_mode=grid&page=6$

Allow: *action=catalogsearch&catalog_mode=grid&page=7$

Allow: *action=catalogsearch&catalog_mode=grid&page=8$

Allow: *action=catalogsearch&catalog_mode=list&page=2$

Allow: *action=catalogsearch&catalog_mode=list&page=3$

Allow: *action=catalogsearch&catalog_mode=list&page=4$

Allow: *action=catalogsearch&catalog_mode=list&page=5$

Allow: *action=catalogsearch&catalog_mode=list&page=6$

Allow: *action=catalogsearch&catalog_mode=list&page=7$

Allow: *action=catalogsearch&catalog_mode=list&page=8$

Disallow: *action=accessorysearch&product=*&*

Allow: *action=accessorysearch&product=*$

Disallow: *action=accessorysearch&

Allow: *action=accessorysearch&page=2$

Allow: *action=accessorysearch&page=3$

Allow: *action=accessorysearch&page=4$

Allow: *action=accessorysearch&page=5$

Allow: *action=accessorysearch&page=6$

Allow: *action=accessorysearch&page=7$

Allow: *action=accessorysearch&page=8$

Disallow: *action=productcompareaction&

Disallow: *action=productLinkAction&

Disallow: *action=overlay&

Disallow: *action=quickSearch&

Disallow: *action=writeReview

Disallow: *rep=hc

Disallow: *fe=true

Disallow: *?intc=

Disallow: *&solved=

Disallow: /music/*/wal/

Disallow: */wal/

Disallow: */layout/

Disallow: */base-en/

Disallow: *action=siteSearch

Disallow: *action=productSupportSearch

Disallow: *=imgmanager

Disallow: */unsubscribe/

Disallow: *ActivityUID=

Disallow: /feeds/TechNet/fr-fr/screenshot/screenshot%20surface.jpg

Disallow: /imaginecup/*

Disallow: /*/download/confirmation.aspx?

Disallow: /*HpOptOut=true$

Disallow: /*TOCLinksForCrawlers*

Disallow: /*mac/help.mspx?

Disallow: /*mactopia/help.mspx?

Disallow: */mediaapi/

Disallow: /blacklisted*

Disallow: /canada/Library/mnp/2/aspx/

Disallow: /communities/bin.aspx?

Disallow: /communities/blogs/PortalResults.mspx?

Disallow: /communities/eventdetails.mspx?

Disallow: /communities/rss.aspx*

Disallow: /*/download/confirmation.aspx?

Disallow: /*/download/registration-suggested.aspx?

Disallow: /*/download/results.aspx?

Disallow: /*/download/Browse.aspx?

Disallow: /*/download/browse.aspx?

Disallow: /*/download/info.aspx?

Disallow: /*/download/thankyou.aspx

Disallow: /*/download/thankyou.aspx?

Disallow: /france/formation/centres/planning.asp?

Disallow: /france/ie/default.asp?

Disallow: /france/mnp_utility.mspx?

Disallow: /genuine/

Disallow: /Germany/kleinunternehmen/euga/detail.mspx?

Disallow: /Germany/kleinunternehmen/euga/results.mspx?

Disallow: /germany/library/images/mnp/

Disallow: /germany/video/de/de/related*

Disallow: /hpc/*/supported-applications.aspx?

Disallow: /ie/ie40/

Disallow: /info/customerror.htm*

Disallow: /info/smart404.asp*

Disallow: /intlkb/

Disallow: /isapi/

Disallow: /Japan/DirectX/default.asp?

Disallow: /japan/directx/default.asp?

Disallow: /japan/enable/textview.asp?

Disallow: /japan/products/library/search.asp?

Disallow: /japan/showcase/print/default.aspx?

Disallow: /japan/terminology/query.asp?

Disallow: /*mnp_utility.mspx?

Disallow: /rus/licensing/Unilateral.aspx/*

Disallow: /spain/empresas/

Disallow: /spain/medianaempresa/

Disallow: /windows/compatibility/windows-vista/

Disallow: /windows/compatibility/windows-7/

Disallow: /windows/compatibility/windows-7/*

Disallow: /windows/404.aspx?*

Disallow: /windows/campaign/meet-start.aspx

Disallow: /windows/campaign/meet-apps.aspx

Disallow: /windows/campaign/features-built-in-apps.aspx

Disallow: /ru-ru/events/platforma/materials/default.aspx?speaker*

Disallow: /de-de/corporate/rechtliche-hinweise/impressum_de.aspx

Disallow: /en/microsoft-365

Disallow: /en/microsoft-365/

Disallow: /es/microsoft-365

Disallow: /es/microsoft-365/

Disallow: /fr/microsoft-365

Disallow: /fr/microsoft-365/

Disallow: /en/security

Disallow: /en/security/

Disallow: /es/security

Disallow: /es/security/

Disallow: /fr/security

Disallow: /fr/security/

Disallow: /en/microsoft-teams

Disallow: /en/microsoft-teams/

Disallow: /es/microsoft-teams

Disallow: /es/microsoft-teams/

Disallow: /fr/microsoft-teams

Disallow: /fr/microsoft-teams/

Disallow: /en/microsoft-viva

Disallow: /en/microsoft-viva/

Disallow: /es/microsoft-viva

Disallow: /es/microsoft-viva/

Disallow: /fr/microsoft-viva

Disallow: /fr/microsoft-viva/

Disallow: */isv/*?


Sitemap: https://www.microsoft.com/store/sitemap-index.xml

Sitemap: https://www.microsoft.com/en-us/surface/surface.index.xml

Sitemap: https://www.microsoft.com/en-us/windows/windows-index.xml

Sitemap: https://www.microsoft.com/sitemaps/ai/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/dynamics-365/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/isv/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/microsoft-365/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/microsoft-copilot/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/microsoft-fabric/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/microsoft-teams/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/power-platform/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/microsoft-viva/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/security/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/trust-center/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/windows-365/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/customers/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/education/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/industry/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/microsoft-cloud/sitemapindex.xml

Sitemap: https://www.microsoft.com/sitemaps/sustainability/sitemapindex.xml

Sitemap: https://www.microsoft.com/en-us/microsoft-365-life-hacks/sitemap.xml

Sitemap: https://www.microsoft.com/windows/business/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 5 entries Valid XML Yes
Child Sitemaps:
A
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

302https://www.microsoft.com/
200https://microsoft.com/

Preferred variant: non-www

HTTP → HTTPS

307http://microsoft.com/ → https://microsoft.com/

Use 301 (permanent) instead of 302 (temporary)

A+
Domain Intelligence
microsoft.com — via MarkMonitor Inc., 35 years, 5 months old
PASS
microsoft.com — via MarkMonitor Inc., 35 years, 5 months old
Info::
Domain registered until May 3, 2027 (1 years remaining)
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: MarkMonitor Inc.
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.
Domain expiry

259 days

May 3, 2027

SSL certificate

179 days

Issued by Microsoft Corporation

Domain age

35 years, 5 months

Registered May 2, 1991

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2603:1061:14:128::1

Registrar

MarkMonitor Inc.

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar MarkMonitor Inc.
Created May 2, 1991 (35 years, 5 months ago)
Expires May 3, 2027 (1 years)
Last Updated January 29, 2026
Name Servers ns1-39.azure-dns.com, ns2-39.azure-dns.net, ns3-39.azure-dns.org, ns4-39.azure-dns.info
DNSSEC Not enabled
Hosting
IP Address 2603:1061:14:128::1
Data source: rdap (0.4s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

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

Connection waterfall

DNS Lookup 4 ms TCP Connect 3 ms TLS Handshake 9 ms Server Processing 4 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.

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