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

301 Moved Permanently

Checks

5 PASS 3 REVIEW 1 FIX

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

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.edf.org/

200https://edf.org/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://edf.org/ → https://edf.org/

Consistent

TLS Certificate Expiry & Recommendations

64 days until leaf cert expires — 4 issues to address

REVIEW

Certificate validity

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

A+

DNS Records

1 A records, 52 ms lookup

PASS

1 A records, 52 ms lookup

Resolves to 1 IPv4 address(es)

Got: 151.101.194.216

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: ns1-06.azure-dns.com, ns2-06.azure-dns.net, ns3-06.azure-dns.org, ns4-06.azure-dns.info

1 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 time: 52 ms

Got: 52 ms

A	151.101.194.216
AAAA	—
CNAME	—
NS	ns1-06.azure-dns.com, ns2-06.azure-dns.net, ns3-06.azure-dns.org, ns4-06.azure-dns.info
MX	10 edf-org.mail.protection.outlook.com
TXT	stripe-verification=00CEE7871989718127B9A23D602D9C499B8C54569FAA7C15368380685810... 0ed1fe018aa030e23df8124a728e13f44b0f2f531f asv=7c4be7c5b857c061d754ab3b1decaf7d jamf-site-verification=-VYFmLqnjB5vMScOXFGOyw fastly-domain-delegation-hvdfjb3moqtvr7wmuwnz-681757-2023-07-26 asv=1ae9bfd38203acee958f0c03c75d1a83 1password-site-verification=66YGPVTBHZA65CXL2TKYPPVCWE EpFGhNbS/04amUNhf6nzN40QB5jxXH1yYsVuJ7whIAddJJ8KsnXD2gDyKtgXWdSXH8Z7FCH3BuA4CCtm... jamf-site-verification=1IxFTDeVQG917MpoGoed1w MS=9247FAB975234E89FDC831657B3E57D23DACB157 apple-domain-verification=khb2C6y3dBNCL5JR bc9b3ef044931b9733884d49760d53ca7bb14f79547497d644abcd159f529c45 SPF v=spf1 mx include:spf.protection.outlook.com include:_spf0.edf.org ~all apple-domain-verification=NNU_9JIwlm8RQlyiFTP_wymkF-qXgtoY7m4GzJjhqWo google-site-verification=t7LV4vVBLamKtYaEiiqhr7f2KSeo18nynP91U7ZomCo
CAA	Lookup not available with standard resolver

Resolved in 52 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.

Redirect Chain

1 redirect(s), 114 ms total

PASS

1 redirect(s), 114 ms total

Single redirect

Got: https://edf.org → https://www.edf.org/ (301)

WWW normalization redirect

https://edf.org

6 ms · HTTP/1.1

301

https://www.edf.org/

108 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://edf.org	301	6 ms	HTTP/1.1
2	https://www.edf.org/	200	108 ms	HTTP/1.1

See the visual redirect chain in the HTTP Probe tab →

A+

Crawlability

robots.txt present, sitemap with 2 URLs

PASS

robots.txt present, sitemap with 2 URLs

robots.txt is present

Got: 5068 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 2 entries

Sitemap index with 2 child sitemaps

robots.txt references sitemap

robots.txt 200 OK

Size 5068 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: *

# Limit time window to every 10 seconds (not followed by Google)
Crawl-delay: 10

# 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/
# Directories: Added 2017-12-01
Disallow: /includes/
Disallow: /misc/
Disallow: /modules/
Disallow: /scripts/
Disallow: /themes/
Disallow: /sites/default/files/private/
# Files
Disallow: /README.txt
Disallow: /README.md
Disallow: /web.config
# Files: Added 2017-12-01
Disallow: /LICENSE.txt
Disallow: /update.php

# 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: /user
# Paths (clean URLs, trailing slash removed)
Disallow: /admin
Disallow: /comment/reply
Disallow: /filter/tip
Disallow: /node/add
Disallow: /search
# 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
Disallow: /index.php/user
# Paths (no clean URLs, trailing slash removed)
Disallow: /index.php/admin
Disallow: /index.php/comment/reply
Disallow: /index.php/filter/tip
Disallow: /index.php/node/add
Disallow: /index.php/search

# Custom files
Disallow: /sites/default/files/Oceans-Update-Feb-20-2013.pdf
Disallow: /sites/default/files/Three-short-updates-for-the-Oceans-Committee.pdf
Disallow: /sites/default/files/Inside-the-BP-Trial-March-5-2013.pdf
Disallow: /sites/default/files/Safer-chemical-principles-Feb-22-2013.pdf
Disallow: /sites/default/files/EDF-ICP_fact-sheet.pdf
Disallow: /sites/default/files/EDF-PA-Comments-11-12-15.pdf
Disallow: /sites/default/files/documents/North-Carolina-Community-Impacts-Agricultural-Methane-Biogas.pdf
Disallow: /sites/edfclimatecorps.org/files/2016_Climate_Corps_Training_Agenda.pdf
Disallow: /sites/edfclimatecorps.org/files/Fellowship_Training_Prework.pdf
Disallow: /sites/edfclimatecorps.org/files/EDFCC-training-travel-information.pdf
Disallow: /sites/edfclimatecorps.org/files/EDFCC-pathway-to-training.pdf
Disallow: /sites/edfclimatecorps.org/files/EDFCC-climate-corps-agenda.pdf
Disallow: /sites/edfclimatecorps.org/files/RFP-EDF-Climate-Corps-OnlineTraining.pdf
Disallow: /sites/edfclimatecorps.org/files/elective-sign-up.pdf
Disallow: /sites/edfclimatecorps.org/files/ESE-Sustainability-Tours.pdf
Disallow: /sites/edfclimatecorps.org/files/ese-2017-agenda.pdf
Disallow: /sites/default/files/energy-conference-bingo-cards.pdf
Disallow: /sites/edfclimatecorps.org/files/summit-tours.pdf
Disallow: /sites/edfclimatecorps.org/files/EDF_Climate_Corps_Summit_Agenda.pdf

# Custom paths
Disallow: /contact/email/*
Disallow: /related_blog_posts/*
Disallow: /slideshow/
Disallow: /less-carbon-more-jobs/map/
Disallow: /less-carbon-more-jobs/district/
Disallow: /our-work-fighting-climate-change
Disallow: /how-you-can-help-2
Disallow: /climate/cap-and-trade-case-studies
Disallow: /sites/default/files/CT_*
Disallow: /living-style-guide/*
Disallow: /george-shultz-edfs-approach-natural-gas-gains-respect
Disallow: /george-shultz-edfs-approach-natural-gas-gains-respect-2
Disallow: /style-guide
Disallow: /home-test
Disallow: /health/myexposome-wristband
Disallow: /50th-anniversary-celebration
Disallow: /methane-moment-event
Disallow: /PPTrsvp
Disallow: /response-forbes-michael-shellenberger
Disallow: /node/23208
Disallow: /methanesat-materials
Disallow: /greenwire
Disallow: /mission-methane
Disallow: /mission-methane-revealed
Disallow: /climatetech
Disallow: /climate-week/turning-climate-risk-climate-progress
Disallow: /people/feed/*
Disallow: /aggregator/sources
Disallow: /aggregator/sources/*

# Custom: AR2019
Disallow: /sites/default/files/AR2019/EDF_Annual_Report_2019.pdf
Disallow: /Zi7B
Disallow: /Zi7X
Disallow: /Zi78
Disallow: /Zi72

# Custom: Sitemap
sitemap: https://www.edf.org/sitemap.xml

sitemap.xml 200 OK

Type Sitemap Index URLs 2 entries Valid XML Yes

Child Sitemaps:

A+

Domain Intelligence

edf.org — via Network Solutions, LLC, 35 years, 1 months old, hosted on Fastly

PASS

edf.org — via Network Solutions, LLC, 35 years, 1 months old, hosted on Fastly

Domain registered until Aug 26, 2026 (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: Network Solutions, LLC

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: Fastly

Got: AS54113

Domain expiry

73 days

August 26, 2026

SSL certificate

64 days

Issued by Let's Encrypt

Domain age

35 years, 1 months

Registered August 27, 1991

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

151.101.194.216

Registrar

Network Solutions, LLC

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 DNSSEC to protect visitors from DNS spoofing
Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers

Registrar Network Solutions, LLC

Created August 27, 1991 (35 years, 1 months ago)

Expires August 26, 2026 (4 months)

Last Updated July 2, 2025

Name Servers ns3-06.azure-dns.org, ns1-06.azure-dns.com, ns2-06.azure-dns.net, ns4-06.azure-dns.info

DNSSEC Not enabled

Hosting

IP Address 151.101.194.216

ASN AS54113 (FASTLY - Fastly, Inc., US)

Provider Fastly

Data source: rdap (0.6s)

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

PASS

DNS Lookup

52 ms

TCP Connect

0 ms

TLS Handshake

3 ms

Time to First Byte

56 ms

Total Time

56 ms

Connection waterfall

DNS Lookup 52 ms TCP Connect 0 ms TLS Handshake 3 ms Server Processing 1 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.