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https://nist.gov

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
94
GRADE
A
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
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.nist.gov/
200https://nist.gov/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://nist.gov/ → https://nist.gov/

Consistent

B
TLS Certificate Expiry & Recommendations
48 days until leaf cert expires — 2 issues to address
REVIEW

Certificate validity

48
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
B
CDN & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: EWR)
Got: cf-ray: 9ed4d420fd5f433d-EWR
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9ed4d420fd5f433d-EWR
A+
DNS Records
4 A records, 32 ms lookup
PASS
4 A records, 32 ms lookup
Info::
Resolves to 4 IPv4 address(es)
Got: 172.65.90.26, 172.65.90.25, 172.65.90.27, 172.65.90.24
Info::
Has 4 IPv6 (AAAA) record(s)
Got: 2606:4700:78::90:0:181, 2606:4700:78::90:0:183, 2606:4700:78::90:0:182, 2606:4700:78::90:0:180
Info::
3 nameserver(s) configured
Got: gold.foundationdns.com, gold.foundationdns.net, gold.foundationdns.org
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: 32 ms
Got: 32 ms
A172.65.90.26, 172.65.90.25, 172.65.90.27, 172.65.90.24
AAAA2606:4700:78::90:0:181, 2606:4700:78::90:0:183, 2606:4700:78::90:0:182, 2606:4700:78::90:0:180
CNAME—
NSgold.foundationdns.com, gold.foundationdns.net, gold.foundationdns.org
MX
0 nist-gov.mail.protection.outlook.com
TXT
jamf-site-verification=Sr15KQEdTRZZXqaxbFaFQw
perplexity-ai-domain-verification-nhwpq4=pka4WCw0WTTo6a1V8GzEWeGyv
openai-domain-verification=dv-c6PoDbyJ7cgfcpT2sCl4IrBD
cisco-ci-domain-verification=1b1e68d4cf0e84478115596723f00e17a848c659bb11f53b58f...
box-domain-verification=4d49553685eee3edbcf58b736eb4c42febff4e1741da8db3098f2bb3...
SPF v=spf1 include:_spf1.nist.gov include:_spf2.nist.gov -all
google-site-verification=oJSFVUoM3RN44bzuiI9F3qWzWxTqmrawzMycAD_NUcY
atlassian-domain-verification=xVa84aCbqa1pJZZdpB0gGm0ZNukDUU4TBzccNbFkyozIg3QXHa...
MS=ms22398849
_hie8b7uqvafayfkdb47ag5t5up1nxbb
CAALookup not available with standard resolver
Resolved in 32 ms

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
Redirect Chain
1 redirect(s), 973 ms total
PASS
1 redirect(s), 973 ms total
Info::
Single redirect
Got: https://nist.gov → https://www.nist.gov/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 973 ms total
Got: 973 ms

https://nist.gov

390 ms · HTTP/1.1

301

https://www.nist.gov/

583 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://nist.gov301390 msHTTP/1.1cloudflare
2https://www.nist.gov/200583 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2606:4700:78::90:0:181, 2606:4700:78::90:0:183, 2606:4700:78::90:0:182, 2606:4700:78::90:0:180
Got: 17 ms connect
IPv6 Ready
AAAA Records 2606:4700:78::90:0:181, 2606:4700:78::90:0:183, 2606:4700:78::90:0:182, 2606:4700:78::90:0:180 Connection Reachable (17 ms)
A+
Crawlability
robots.txt present, sitemap with 55 URLs
PASS
robots.txt present, sitemap with 55 URLs
Info::
robots.txt is present
Got: 2425 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 55 entries
Info::
Sitemap index with 55 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 2425 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: *
# CSS, JS, Images
Allow: /core/*.css$
Allow: /core/*.css?
Allow: /core/*.js$
Allow: /core/*.js?
Allow: /core/*.gif
Allow: /core/*.jpg
Allow: /core/*.jpeg
Allow: /core/*.png
Allow: /core/*.svg
Allow: /profiles/*.css$
Allow: /profiles/*.css?
Allow: /profiles/*.js$
Allow: /profiles/*.js?
Allow: /profiles/*.gif
Allow: /profiles/*.jpg
Allow: /profiles/*.jpeg
Allow: /profiles/*.png
Allow: /profiles/*.svg
# Directories
Disallow: /core/
Disallow: /profiles/
# Files
Disallow: /README.md
Disallow: /composer/Metapackage/README.txt
Disallow: /composer/Plugin/ProjectMessage/README.md
Disallow: /composer/Plugin/Scaffold/README.md
Disallow: /composer/Plugin/VendorHardening/README.txt
Disallow: /composer/Template/README.txt
Disallow: /modules/README.txt
Disallow: /sites/README.txt
Disallow: /themes/README.txt
Disallow: /web.config
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register
Disallow: /user/password
Disallow: /user/login
Disallow: /user/logout
Disallow: /media/oembed
Disallow: /*/media/oembed
# Paths (no clean URLs)
Disallow: /index.php/admin/
Disallow: /index.php/comment/reply/
Disallow: /index.php/filter/tips
Disallow: /index.php/node/add/
Disallow: /index.php/search/
Disallow: /index.php/user/password
Disallow: /index.php/user/register
Disallow: /index.php/user/login
Disallow: /index.php/user/logout
Disallow: /index.php/media/oembed
Disallow: /index.php/*/media/oembed

# Noindex files
Disallow: /system/files/documents/noindex/
Disallow: /index.php/system/files/documents/noindex/

# Search
Disallow: /fusion-search
Disallow: /index.php/fusion-search
Disallow: /site-search
Disallow: /index.php/site-search
Disallow: /search
Disallow: /index.php/search

# Disallow facet links
Disallow: *?f%5B*
Disallow: *&f%5B*

# Sitemap
Sitemap: https://www.nist.gov/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 55 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
nist.gov — via get.gov, 28 years, 11 months old
PASS
nist.gov — via get.gov, 28 years, 11 months old
Info::
Domain registered until Aug 24, 2026 (4 months remaining)
Info::
DNSSEC is enabled
Info::
Registrar: get.gov
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

44 days

August 24, 2026

SSL certificate

48 days

Issued by Let's Encrypt

Domain age

28 years, 11 months

Registered October 2, 1997

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:78::90:0:183

Registrar

get.gov

Unlocked 3 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the domain or enable auto-renewal to prevent accidental expiry
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar get.gov
Created October 2, 1997 (28 years, 11 months ago)
Expires August 24, 2026 (4 months)
Last Updated August 29, 2025
Name Servers gold.foundationdns.com, gold.foundationdns.net, gold.foundationdns.org
DNSSEC Enabled
Registrant REDACTED FOR PRIVACY
Hosting
IP Address 2606:4700:78::90:0:183
Data source: rdap (0.4s)

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

Connection waterfall

DNS Lookup 30 ms TCP Connect 16 ms TLS Handshake 273 ms Server Processing 96 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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