Infrastructure - https://energystar.gov BeaverCheck Audit

D

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.

C

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

B

URL Variants

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

REVIEW

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

Both www and non-www versions serve content

Got: Both variants return 200 Expected: One variant 301-redirects to the other

HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.energystar.gov/

200https://energystar.gov/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://energystar.gov/ → https://www.energystar.gov/

Consistent

B

TLS Certificate Expiry & Recommendations

244 days until leaf cert expires — 3 issues to address

REVIEW

Certificate validity

244

days left

0d 30d 60d 90d+

Recommended actions

Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy

A

DNS Records

1 A records, 1126 ms lookup

PASS

1 A records, 1126 ms lookup

Resolves to 1 IPv4 address(es)

Got: 204.47.252.17

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

No IPv6 (AAAA) records

4 nameserver(s) configured

Got: nccns2.epa.gov, dcns1.epa.gov, dcns2.epa.gov, nccns1.epa.gov

4 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 (1126 ms)

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

Got: 1126 ms

A	204.47.252.17
AAAA	—
CNAME	—
NS	nccns2.epa.gov, dcns1.epa.gov, dcns2.epa.gov, nccns1.epa.gov
MX	5 grid1f.gseg.att.com 10 grid2f.gseg.att.com 50 grid1f6.gseg.att.com 55 grid2f6.gseg.att.com
TXT	SPF v=spf1 include:_spf.salesforce.com include:_epamail.epa.gov -all facebook-domain-verification=ikcraqe2dno6r77hs7a6jgvhhrhxxz
CAA	Lookup not available with standard resolver

Resolved in 1126 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), 990 ms total

PASS

1 redirect(s), 990 ms total

Single redirect

Got: https://energystar.gov → https://www.energystar.gov/ (301)

WWW normalization redirect

Redirect overhead: 990 ms total

Got: 990 ms

https://energystar.gov

473 ms · HTTP/1.1

301

https://www.energystar.gov/

517 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://energystar.gov	301	473 ms	HTTP/1.1	nginx
2	https://www.energystar.gov/	200	517 ms	HTTP/1.1	nginx

See the visual redirect chain in the HTTP Probe tab →

A+

Crawlability

robots.txt present, sitemap with 18324 URLs

PASS

robots.txt present, sitemap with 18324 URLs

robots.txt is present

Got: 2433 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 18324 entries

robots.txt references sitemap

robots.txt 200 OK

Size 2433 B Sitemaps referenced 1 User-agents usasearch, *, ClaudeBot 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: usasearch

Allow: /buildings/tools-and-resources

Allow: /products/tools_resources

Allow: /products/ask-the-experts


User-agent: *

Sitemap: https://www.energystar.gov/sitemap.xml

# 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

Disallow: /buildings/tools-and-resources

Disallow: /products/tools_resources

Disallow: /products/ask-the-experts

# 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


User-agent: ClaudeBot

Disallow: /

sitemap.xml 200 OK

Type URL Set URLs 18324 entries Valid XML Yes

Sample URLs:

A+

Domain Intelligence

energystar.gov — via get.gov, 28 years, 11 months old, hosted on EPA-NET - Environmental Protection Agency, US

PASS

energystar.gov — via get.gov, 28 years, 11 months old, hosted on EPA-NET - Environmental Protection Agency, US

Domain registered until Sep 5, 2026 (4 months remaining)

DNSSEC is enabled

Registrar: get.gov

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: EPA-NET - Environmental Protection Agency, US

Got: AS14298

Domain expiry

49 days

September 5, 2026

SSL certificate

244 days

Issued by DigiCert Inc

Domain age

28 years, 11 months

Registered October 2, 1997

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

EPA-NET - Environmental Protection Agency, US

ASN AS14298

204.47.252.17

Registrar

get.gov

Unlocked 4 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 September 5, 2026 (4 months)

Last Updated March 10, 2026

Name Servers dcns1.epa.gov, dcns2.epa.gov, nccns1.epa.gov, nccns2.epa.gov

DNSSEC Enabled

Registrant REDACTED FOR PRIVACY

Hosting

IP Address 204.47.252.17

ASN AS14298 (EPA-NET - Environmental Protection Agency, US)

Provider EPA-NET - Environmental Protection Agency, US

Data source: rdap (0.6s)

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

PASS

DNS Lookup

117 ms

TCP Connect

117 ms

TLS Handshake

235 ms

Time to First Byte

586 ms

Total Time

586 ms

Connection waterfall

DNS Lookup 117 ms TCP Connect 117 ms TLS Handshake 235 ms Server Processing 117 ms Content Transfer 0 ms