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 Madrid, Spain

200 OK

Checks

6 PASS 3 REVIEW

DNS Records

1 A records, 46 ms lookup

REVIEW

1 A records, 46 ms lookup

Resolves to 1 IPv4 address(es)

Got: 150.171.110.117

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

Has 1 IPv6 (AAAA) record(s)

Got: 2603:1061:14:174::1

CNAME record at zone apex

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Got: prod-dupont-na-us-cxbuerb0a8hjdjgy.a01.azurefd.net

No NS records found

No MX records — email not configured via DNS

CAA records not checked

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

No SPF record found in TXT records

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

DNS resolution time: 46 ms

Got: 46 ms

A	150.171.110.117
AAAA	2603:1061:14:174::1
CNAME	prod-dupont-na-us-cxbuerb0a8hjdjgy.a01.azurefd.net
NS	—
MX	—
TXT	—
CAA	Lookup not available with standard resolver

Resolved in 46 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

A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

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.

Why this matters

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'.

Why this matters

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)

Crawlability

robots.txt present, no sitemap

REVIEW

robots.txt present, no sitemap

robots.txt is present

Got: 10240 bytes

No sitemap.xml found

A sitemap helps search engines discover and index your pages more efficiently.

robots.txt does not reference a sitemap

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

A sitemap helps search engines discover and index your pages more efficiently.

Why this matters

No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.

Learn more ▾

A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.

Source: sitemaps.org / Google Search Central

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 10240 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed

#robots.txt file for www.dupont.com
#ITRN

User-agent: *
Disallow: /content/en_us/home/*
Disallow: /content/dam/dupont/products-and-services/*
Disallow: /content/DuPont1/*
Disallow: /content/dam/dupont/industries/*
Disallow: /content/dam/dupont/corporate/*
Disallow: /content/dam/dupont/campaigns/*
Disallow: /content/dam/dupont/general/*
Disallow: /content/dam/dupont/global/*
Disallow: /content/dam/dupont/micrositesmicrosites/*
Disallow: /content/dupont/amer/us/en/corporate-homepage.html
Disallow: /products/electronic-materials.html
Disallow: /references/*
Disallow: /references1/*
Disallow: /404.html
Disallow: /blogs.html
Disallow: /blogs/electronic-materials.html
Disallow: /microsites/cyrel.html
Disallow: /industries.html
Disallow: /brands/corporate.html
Disallow: /brands/water.html
Disallow: /brands/pbs.html
Disallow: /brands/transportation.html
Disallow: /solar-photovoltaic-materials/references/*
Disallow: /eslresidentportal/references/*
Disallow: /water/references/*
Disallow: /digital-printing/References/*
Disallow: /cyrel/references/*
Disallow: /flexographic-systems/references/*
Disallow: /transportation-industrial/references/*
Disallow: /building/references/*
Disallow: /electronic-materials/referances/*
#Disallow: /products-and-services/*
Disallow: /ec/*
Disallow: /crop/*
Disallow: /general/*
Disallow: /corporate-functions/*
Disallow: /annual-report/*
Disallow: /dpt/*
Disallow: /nativeapp/*
Disallow: /microsites.html
Disallow: /products/water.html
Disallow: /products/transportation.html
Disallow: /products/performance-building-solutions.html
Disallow: /products/microbial.html
Disallow: /products/industrial.html
Disallow: /products/electronic-materials.html
Disallow: /products/pbs.html
Disallow: /products/healthcare.html
Disallow: /products/safety.html
Disallow: /products/cyrel.html
Disallow: /products/safety/kevlar.html
Disallow: /products/safety/nomex.html
Disallow: /products/safety/tyvek.html
Disallow: /products/personal-protection.html
Disallow: /products/personal-protection/safespec.html
Disallow: /products/artistri-inks.html
Disallow: /products/solar-photovoltaic-materials.html
Disallow: /news/corporate.html
Disallow: /news/corporate/2020.html
Disallow: /news/corporate/2020/press-releases.html
Disallow: /news/corporate/2020/article.html
Disallow: /news/corporate/2019.html
Disallow: /news/corporate/2019/press-releases.html
Disallow: /news/corporate/2019/article.html
Disallow: /news/corporate/2018.html
Disallow: /news/corporate/2018/press-releases.html
Disallow: /news/corporate/2018/article.html
Disallow: /news/corporate/2017.html
Disallow: /news/corporate/2017/press-releases.html
Disallow: /news/corporate/2017/article.html
Disallow: /news/electronic-materials.html
Disallow: /news/electronic-materials/2020.html
Disallow: /news/electronic-materials/2020/press-releases.html
Disallow: /news/electronic-materials/2020/article.html
Disallow: /news/electronic-materials/2019.html
Disallow: /news/electronic-materials/2019/press-releases.html
Disallow: /news/electronic-materials/2019/article.html
Disallow: /news/electronic-materials/2018.html
Disallow: /news/electronic-materials/2018/press-releases.html
Disallow: /news/electronic-materials/2018/article.html
Disallow: /news/electronic-materials/2017.html
Disallow: /news/electronic-materials/2017/press-releases.html
Disallow: /news/electronic-materials/2017/article.html
Disallow: /news/electronic-materials/2016.html
Disallow: /news/electronic-materials/2016/press-releases.html
Disallow: /news/electronic-materials/2016/article.html
Disallow: /news/water-solutions.html
Disallow: /news/water-solutions/2020.html
Disallow: /news/water-solutions/2020/press-releases.html
Disallow: /news/water-solutions/2020/article.html
Disallow: /news/water-solutions/2019.html
Disallow: /news/water-solutions/2019/press-releases.html
Disallow: /news/water-solutions/2019/article.html
Disallow: /news/water-solutions/2018.html
Disallow: /news/water-solutions/2018/press-releases.html
Disallow: /news/water-solutions/2018/article.html
Disallow: /news/water-solutions/2017.html
Disallow: /news/water-solutions/2017/press-releases.html
Disallow: /news/water-solutions/2017/article.html
Disallow: /news/supplier-diversity.html
Disallow: /news/supplier-diversity/2020.html
Disallow: /news/supplier-diversity/2020/press-releases.html
Disallow: /news/supplier-diversity/2020/article.html
Disallow: /news/supplier-diversity/2019.html
Disallow: /news/supplier-diversity/2019/press-releases.html
Disallow: /news/supplier-diversity/2019/article.html
Disallow: /news/supplier-diversity/2018.html
Disallow: /news/supplier-diversity/2018/press-releases.html
Disallow: /news/supplier-diversity/2018/article.html
Disallow: /news/performance-building-solutions.html
Disallow: /news/performance-building-solutions/2020.html
Disallow: /news/performance-building-solutions/2020/press-releases.html
Disallow: /news/performance-building-solutions/2020/article.html
Disallow: /news/performance-building-solutions/2019.html
Disallow: /news/performance-building-solutions/2019/press-releases.html
Disallow: /news/performance-building-solutions/2019/article.html
Disallow: /news/performance-building-solutions/2018.html
Disallow: /news/performance-building-solutions/2018/press-releases.html
Disallow: /news/performance-building-solutions/2018/article.html
Disallow: /news/performance-building-solutions/2017.html
Disallow: /news/performance-building-solutions/2017/press-releases.html
Disallow: /news/performance-building-solutions/2017/article.html
Disallow: /news/transportation.html
Disallow: /news/transportation/2020.html
Disallow: /news/transportation/2020/press-releases.html
Disallow: /news/transportation/2020/article.html
Disallow: /news/transportation/2019.html
Disallow: /news/transportation/2019/press-releases.html
Disallow: /news/transportation/2019/article.html
Disallow: /news/transportation/2018.html
Disallow: /news/transportation/2018/press-releases.html
Disallow: /news/transportation/2018/article.html
Disallow: /news/transportation/2017.html
Disallow: /news/transportation/2017/press-releases.html
Disallow: /news/transportation/2017/article.html
Disallow: /news/personal-protection.html
Disallow: /news/personal-protection/2020.html
Disallow: /news/personal-protection/2020/press-releases.html
Disallow: /news/personal-protection/2020/article.html
Disallow: /news/personal-protection/2019.html
Disallow: /news/personal-protection/2019/press-releases.html
Disallow: /news/personal-protection/2019/article.html
Disallow: /news/personal-protection/2018.html
Disallow: /news/personal-protection/2018/press-releases.html
Disallow: /news/personal-protection/2018/article.html
Disallow: /news/personal-protection/2017.html
Disallow: /news/personal-protection/2017/press-releases.html
Disallow: /news/personal-protection/2017/article.html
Disallow: /news/personal-protection/2016.html
Disallow: /news/personal-protection/2016/press-releases.html
Disallow: /news/personal-protection/2016/article.html
Disallow: /news/cyrel.html
Disallow: /news/cyrel/2020.html
Disallow: /news/cyrel/2020/press-releases.html
Disallow: /news/cyrel/2020/article.html
Disallow: /news/cyrel/2019.html
Disallow: /news/cyrel/2019/press-releases.html
Disallow: /news/cyrel/2019/article.html
Disallow: /news/cyrel/2018.html
Disallow: /news/cyrel/2018/press-releases.html
Disallow: /news/cyrel/2018/article.html
Disallow: /news/cyrel/2017.html
Disallow: /news/cyrel/2017/press-releases.html
Disallow: /news/cyrel/2017/article.html
Disallow: /news/cyrel/2016.html
Disallow: /news/cyrel/2016/press-releases.html
Disallow: /news/cyrel/2016/article.html
Disallow: /news/safety.html
Disallow: /news/safety/2020.html
Disallow: /news/safety/2020/press-releases.html
Disallow: /news/safety/2020/article.html
Disallow: /news/safety/2019.html
Disallow: /news/safety/2019/press-releases.html
Disallow: /news/safety/2019/article.html
Disallow: /news/safety/2018.html
Disallow: /news/safety/2018/press-releases.html
Disallow: /news/safety/2018/article.html
Disallow: /news/safety/2017.html
Disallow: /news/safety/2017/press-releases.html
Disallow: /news/safety/2017/article.html
Disallow: /news/safety/2016.html
Disallow: /news/safety/2016/press-releases.html
Disallow: /news/safety/2016/article.html
Disallow: /news/artistri-inks.html
Disallow: /news/artistri-inks/2020.html
Disallow: /news/artistri-inks/2020/press-releases.html
Disallow: /news/artistri-inks/2020/article.html
Disallow: /news/artistri-inks/2019.html
Disallow: /news/artistri-inks/2019/press-releases.html
Disallow: /news/artistri-inks/2019/article.html
Disallow: /news/artistri-inks/2018.html
Disallow: /news/artistri-inks/2018/press-releases.html
Disallow: /news/artistri-inks/2018/article.html
Disallow: /news/artistri-inks/2017.html
Disallow: /news/artistri-inks/2017/press-releases.html
Disallow: /news/artistri-inks/2017/article.html
Disallow: /news/artistri-inks/2016.html
Disallow: /news/artistri-inks/2016/press-releases.html
Disallow: /news/artistri-inks/2016/article.html
Disallow: /news/solar-photovoltaic-materials.html
Disallow: /news/solar-photovoltaic-materials/2020.html
Disallow: /news/solar-photovoltaic-materials/2020/press-releases.html
Disallow: /news/solar-photovoltaic-materials/2020/article.html
Disallow: /news/solar-photovoltaic-materials/2019.html
Disallow: /news/solar-photovoltaic-materials/2019/press-releases.html
Disallow: /news/solar-photovoltaic-materials/2019/article.html
Disallow: /news/solar-photovoltaic-materials/2018.html
Disallow: /news/solar-photovoltaic-materials/2018/press-releases.html
Disallow: /news/solar-photovoltaic-materials/2018/article.html
Disallow: /news/solar-photovoltaic-materials/2017.html
Disallow: /news/solar-photovoltaic-materials/2017/press-releases.html
Disallow: /news/solar-photovoltaic-materials/2017/article.html
Disallow: /news/solar-photovoltaic-materials/2016.html
Disallow: /news/solar-photovoltaic-materials/2016/press-releases.html
Disallow: /news/solar-photovoltaic-materials/2016/article.html
Disallow: /news/tedlar-wallcoverings.html
Disallow: /news/tedlar-wallcoverings/2020.html
Disallow: /news/tedlar-wallcoverings/2020/press-releases.html
Disallow: /news/tedlar-wallcoverings/2020/article.html
Disallow: /news/tedlar-wallcoverings/2019.html
Disa

sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

TLS Certificate Expiry & Recommendations

60 days until leaf cert expires — 3 issues to address

REVIEW

Certificate validity

days left

0d 30d 60d 90d+

Recommended actions

Submit your domain to hstspreload.org to be added to the Chrome preload list
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 Chain

No redirects — direct access

PASS

No redirects — direct access

Got: https://www.dupont.com

https://www.dupont.com

78 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://www.dupont.com	200	78 ms	HTTP/1.1

A+

IPv6 Readiness

IPv6 reachable (17 ms)

PASS

IPv6 reachable (17 ms)

IPv6 is configured and reachable at 2603:1061:14:174::1

Got: 17 ms connect

IPv6 Ready

AAAA Records 2603:1061:14:174::1 Connection Reachable (17 ms)

URL Variants

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

PASS

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

HTTP→HTTPS redirect uses 302 instead of 301

Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

200https://www.dupont.com/

https://dupont.com/

HTTP → HTTPS

307http://www.dupont.com/ → https://www.dupont.com/

Use 301 (permanent) instead of 302 (temporary)

A+

Domain Intelligence

dupont.com — via MarkMonitor Inc., 39 years, 3 months old, hosted on SECURITYSERVICES - Vercara, LLC, US

PASS

dupont.com — via MarkMonitor Inc., 39 years, 3 months old, hosted on SECURITYSERVICES - Vercara, LLC, US

Domain registered until Jul 26, 2033 (7 years, 4 months remaining)

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.

Registrar: MarkMonitor Inc.

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: SECURITYSERVICES - Vercara, LLC, US

Got: AS19905

Domain expiry

2599 days

July 26, 2033

SSL certificate

60 days

Issued by DigiCert Inc

Domain age

39 years, 3 months

Registered July 27, 1987

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

SECURITYSERVICES - Vercara, LLC, US

ASN AS19905

204.74.99.100

Registrar

MarkMonitor Inc.

Unlocked 6 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 July 27, 1987 (39 years, 3 months ago)

Expires July 26, 2033 (7 years, 4 months)

Last Updated April 3, 2024

Name Servers pdns1.ultradns.net, pdns2.ultradns.net, pdns3.ultradns.org, pdns4.ultradns.org, pdns5.ultradns.info, pdns6.ultradns.co.uk

DNSSEC Not enabled

Hosting

IP Address 204.74.99.100

ASN AS19905 (SECURITYSERVICES - Vercara, LLC, US)

Provider SECURITYSERVICES - Vercara, LLC, US

Data source: rdap (0.3s)

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 151 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

75 ms

TCP Connect

17 ms

TLS Handshake

36 ms

Time to First Byte

151 ms

Total Time

151 ms

Connection waterfall

DNS Lookup 75 ms TCP Connect 17 ms TLS Handshake 36 ms Server Processing 23 ms Content Transfer 0 ms

A+

CDN & Delivery

Azure CDN (TCP_HIT)

PASS

Azure CDN (TCP_HIT)

Site is served via Azure CDN CDN

Got: x-azure-ref: 20260422T210754Z-1675fbfb9b4n2kmmhC1PARw4hn0000000kx000000000xsn4

CDN cache status: TCP_HIT

CDN Detected: Azure CDN

Provider Azure CDN Cache Status TCP_HIT Evidence x-azure-ref: 20260422T210754Z-1675fbfb9b4n2kmmhC1PARw4hn0000000kx000000000xsn4

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