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https://instructure.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
87
GRADE
B
FIX
0
REVIEW
3
PASS
6
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
6 PASS 3 REVIEW
C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
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
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.instructure.com/
200https://instructure.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://instructure.com/ → https://instructure.com/

Consistent

C
TLS Certificate Expiry & Recommendations
Action
14 days until leaf cert expires — 5 issues to address
REVIEW

Certificate validity

14
days left
0d 30d 60d 90d+
Renew soon — under 30 days remaining

Recommended actions

  • Renew certificate — 14 days remaining
  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • 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
2 A records, 74 ms lookup
PASS
2 A records, 74 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 151.101.66.132, 151.101.2.132
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net, ns-1354.awsdns-41.org
Info::
5 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: 74 ms
Got: 74 ms
A151.101.66.132, 151.101.2.132
AAAA—
CNAME—
NSns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net, ns-1354.awsdns-41.org
MX
0 aspmx.l.google.com
10 alt2.aspmx.l.google.com
10 alt1.aspmx.l.google.com
20 aspmx3.googlemail.com
20 aspmx2.googlemail.com
TXT
adobe-idp-site-verification=4287460e7429c97ad75b995bdef6b0d7ff1c9b541946abfaf285...
miro-verification=0ee36f655f5ce0499683c255714fcdbe990af0e0
ZOOM_verify_Up1Opd4-S9ChtRORps16qw
canva-site-verification=jRPvv0c9AZGTaJIIPIpfAQ
2acd5847c66f4325be05af390213b8c7.instructure.com
fastly-domain-delegation-jpv3oeoqr3aouxwkbhpb-00480650-2025-07-31
google-site-verification=WSlNW84_Zm6mbOaM35pQyLJUt7-OtVXNjzXe9LT-eJI
anthropic-domain-verification-4mh4xs=A4vkPXqJIA4VVi9GAbxDEPohr
atlassian-domain-verification=pS8CbCDhL3R1mMujl07LwhltWFcJtks8mrBa7l/1uocODR9nkz...
anthropic-domain-verification-2pz98m=hO4bmZQTC5gutJZcanKeagAWR
bugcrowd-verification=817deedf9414a9ea878ff255c42a9afa
m6bll7f2q2d2uidl6cq273dma0
openai-domain-verification=dv-wb5qFISTkDoktTMXLsDMVuZ0
apple-domain-verification=8oZZjgKWADRgkWui
mongodb-site-verification=UyyatYgRcdnc3W9g8StgD1OK8wfcIouE
drift-domain-verification=608941e9992460f0ccd58daa1decf1808863da188a92910658284f...
zoho-verification=zb08654551.zmverify.zoho.com
MS=ms20700021
anthropic-domain-verification-vz61c8=kfBobb4vvH2M9xtsZhFajtKHr
astro-domain-verification=cmbjhzn9b0c0h01pimts1v2h1
docker-verification=7555bc65-ce7a-4ed2-8028-4bf0274d2c5b
zapier-domain-verification-challenge=fe79b183-171c-432c-bf5d-48b3e73fd0af
pendo-domain-verification=2l9wI_SzXdfdzA0ZCZUES4O0FS0
google-site-verification=bC89ByaBs616PDmJLrSUG5RS3fyA8agwCtXch9G0GL0
SPF v=spf1 include:_spf.google.com include:amazonses.com include:_spf.q4press.com in...
google-site-verification=3SDlSr_fW_6bYm0BDDK4ZXs6I5yKtB4WyXL3GNozx8I
jamf-site-verification=-bAufptjYdQAfzF-s7PBtQ
figma-domain-verification=848b9254b032bfe488e955a140a8a63cb345186c3c69b7200f7843...
canva-site-verification=jiASD5n0aNnvUnfIP1w4XA
hcp-domain-verification=24de36f1e2e1ad573ac320a62707e7ec8ac0cce2dccf7985914a8d0f...
onetrust-domain-verification=5ef48d8081ac4ab6adce9ed80c92f4e5
anthropic-domain-verification-pz1pr3=sZkvFuBJeSdmEXoj4KJYYQW8Z
docusign=1ca86ab9-2ddb-4d63-b719-4798811390ca
CAALookup not available with standard resolver
Resolved in 74 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), 70 ms total
PASS
1 redirect(s), 70 ms total
Info::
Single redirect
Got: https://instructure.com → https://www.instructure.com/ (301)
Info::
WWW normalization redirect

https://instructure.com

7 ms · HTTP/1.1

301

https://www.instructure.com/

63 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://instructure.com3017 msHTTP/1.1Varnish
2https://www.instructure.com/20063 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 4828 URLs
PASS
robots.txt present, sitemap with 4828 URLs
Info::
robots.txt is present
Got: 2056 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 4828 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 2056 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.txt
Disallow: /web.config
Disallow: /sites/default/files/pdf/*.pdf
Disallow: /media/*/edit
# Specific Files
Disallow: /sites/default/files/file/2022-03/Instructure%20Security%20%282022%29.pdf
# 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: /listed-event/
Disallow: /test/
Disallow: /taxonomy/
Disallow: /node/
Disallow: /quote/
Disallow: /node
Disallow: /search-deprecated
Disallow: /search-deprecated/
Disallow: /in-the-news/
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/

Sitemap: https://www.instructure.com/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 4828 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
instructure.com — via NameCheap, Inc., 28 years, 6 months old, hosted on Fastly
PASS
instructure.com — via NameCheap, Inc., 28 years, 6 months old, hosted on Fastly
Info::
Domain registered until Feb 24, 2027 (10 months 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: NameCheap, 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.
Info::
Hosting: Fastly
Got: AS54113
Domain expiry

253 days

February 24, 2027

SSL certificate

14 days

Issued by Certainly

Domain age

28 years, 6 months

Registered February 25, 1998

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Fastly

ASN AS54113

151.101.2.132

Registrar

NameCheap, Inc.

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the TLS certificate or verify auto-renewal is working
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar NameCheap, Inc.
Created February 25, 1998 (28 years, 6 months ago)
Expires February 24, 2027 (10 months)
Last Updated January 25, 2026
Name Servers ns-1354.awsdns-41.org, ns-1799.awsdns-32.co.uk, ns-2.awsdns-00.com, ns-996.awsdns-60.net
DNSSEC Not enabled
Hosting
IP Address 151.101.2.132
ASN AS54113 (FASTLY - Fastly, Inc., US)
Provider Fastly
Data source: rdap (0.1s)

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

Connection waterfall

DNS Lookup 26 ms TCP Connect 0 ms TLS Handshake 3 ms Server Processing 3 ms Content Transfer 0 ms
A+
CDN & Delivery
Fastly (HIT)
PASS
Fastly (HIT)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-toj-leto2350038-TOJ
Info::
CDN cache status: HIT
CDN Detected: Fastly
Provider Fastly Cache Status HIT Evidence x-served-by: cache-toj-leto2350038-TOJ
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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