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https://hbs.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
86
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
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
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.hbs.edu/
200https://hbs.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://hbs.edu/ → https://www.hbs.edu/

Consistent

B
TLS Certificate Expiry & Recommendations
138 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

138
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
  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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, 102 ms lookup
PASS
1 A records, 102 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 128.103.124.107
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns1-38.azure-dns.com, ns4-38.azure-dns.info, ns2-38.azure-dns.net, ns3-38.azure-dns.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: 102 ms
Got: 102 ms
A128.103.124.107
AAAA—
CNAME—
NSns1-38.azure-dns.com, ns4-38.azure-dns.info, ns2-38.azure-dns.net, ns3-38.azure-dns.org
MX
0 hbs-edu.mail.protection.outlook.com
TXT
2nlfqmqvhklzfhzt9k3rtsfp2wt7k6pr
workspace_mjbxg35dfz3ut3ferqm
cisco-ci-domain-verification=5eefa9e06279e8347d5a3890fee2647546c934d381d2fad041b...
759dded284e74e05affa6d5e9265f07b
smartsheet-site-validation=4Yoy3WT6fIqQIdHLNxq4w8Jm6tUXDFJK
tmes=a18926e3a06d3b62227000f92b63ac3c
openai-domain-verification=dv-N0AJMTlwiqDrJ50CnOOTDtVA
MS=ms43247693
airtable-verification=a92cef30671587a4f6deb7951c1c3f1a
google-site-verification=KWWYxaXGTAa5LHvT8lM806dEPJ40bQ_kWVmWOwWeZ78
google-site-verification=c8yyoa6hgn1nnyyeRMj7IQm1X4wjFT2p9Qe_NeB9PBM
facebook-domain-verification=oja2f2thuafwhte6h60nf0msr2sxp5
v=DKIM1; k=rsa;p=p="MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtOajCM1EA837f/qr...
SFMC-Gip__BGh6JJG1QgzdgI2nxXgWSOqkAYV-U_GbrJy
anthropic-domain-verification-1s9aq9=FtEpZvDFj779FaEOzBpUuQI9W
google-site-verification=c-eaSAavhfMv5ChJyT8tZbpoz8KQY4W7qzjzh5yFJ70
SPF v=spf1 ip4:199.94.19.0/24 ip4:199.94.20.0/24 ip4:128.103.0.0/16 ip4:198.245.85.8...
atlassian-domain-verification=MrrVn0jd3Vovf0f63CeGlmxWGmnkIJjDchwflNLdm4sg8wlRIA...
atlassian-domain-verification=QVOqqD/jaSFcxusq6e05h36VGz8CZyBa4RworUk0MhCx0v3BuK...
manus-domain-verification-797tq1=rS9Dfb1DQkRfVyzzaSTVdff9e
miro-verification=9345300622344c33b1181efcb9424832ac017640
pFKF7oEYfg7mo0mK6psIlIf/qVXwG+38RhEhJ9kBHZ5WyPkQgqhiaVBfGnFo0AND8beSeIcdNzzrsiVD...
CAALookup not available with standard resolver
Resolved in 102 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.

A
Redirect Chain
1 redirect(s), 911 ms total
PASS
1 redirect(s), 911 ms total
Info::
Single redirect
Got: https://hbs.edu → https://www.hbs.edu/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 911 ms total
Got: 911 ms

https://hbs.edu

409 ms · HTTP/1.0

301

https://www.hbs.edu/

501 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://hbs.edu301409 msHTTP/1.0BigIP
2https://www.hbs.edu/200501 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 22 URLs
PASS
robots.txt present, sitemap with 22 URLs
Info::
robots.txt is present
Got: 2855 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 22 entries
Info::
Sitemap index with 22 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 2855 B Sitemaps referenced 1 User-agents Bingbot, * Blocking No — crawling allowed
User-agent: Bingbot
Disallow: /competitiveness/research/*

User-agent: *
Crawl-delay: 2
Disallow: /trash
Disallow: /js/trash
Disallow: /search*
Disallow: /search/trash
Disallow: /search/ssi/trash
Disallow: /search/ssi/
Disallow: /ssi/trash
Disallow: /leadership/faculty
Disallow: /shared/docs
Disallow: /redirects.txt
Disallow: /creating-emerging-markets/interviews/*?*&*
Disallow: /creating-emerging-markets/video-database/Pages/default.aspx?.*
Disallow: /competitiveness/forum/2014-04-25.html
Disallow: /PortraitProject/2002/images/AnonymousStudent.jpg
Disallow: /PortraitProject/2002/images/AnonymousStudent-thumb.jpg
Disallow: /PortraitProject/2002/AnonymousStudent.html
Disallow: /user_testing_tmp
Disallow: /competitiveness/Documents/energy-agenda-Jan2627.pdf
Disallow: /competitiveness/Documents/energy-bio-book-Jan2627.pdf
Disallow: /competitiveness/Documents/energy-logistics-Jan2627.pdf
Disallow: /competitiveness/Documents/energy-roster-Jan2627.pdf
Disallow: /competitiveness/Documents/energy-research-Jan2627.pdf
Disallow: /competitiveness/research/Pages/*
Disallow: /competitiveness/media/Pages/*
Disallow: /faculty/research/publications/Pages/default.aspx?*&*
Disallow: /faculty/research/seminars-conferences/Pages/default.aspx?.*
Disallow: /faculty/Pages/browse.aspx?*&*
Disallow: /doctoral/Pages/search.aspx?*
Disallow: /about/video.aspx?*
Disallow: /managing-the-future-of-work/podcast/Pages/default.aspx?*&*
Disallow: /mba/admissions/Pages/landing-page.aspx
Disallow: /mba/academic-experience/joint-degree-programs/school-of-engineering-and-applied-sciences/Pages/msmba-engineering-sciences.aspx
Disallow: /mba/academic-experience/joint-degree-programs/life-sciences-harvard-graduate-school-arts-sciences/Pages/MSMBA-Biotechnology-Life-Sciences-landing0710-9411.aspx
Disallow: /mba/academic-experience/FIELD/Pages/default.aspx
Disallow: /mba/academic-experience/FIELD/Pages/benefits-of-global-partnership.aspx
Disallow: /mba/academic-experience/FIELD/Pages/propose-a-project.aspx
Disallow: /mba/academic-experience/FIELD/Pages/timeline.aspx
Disallow: /mba/admissions/da2015/Pages/default.aspx
Disallow: /mba/admissions/nextstopHBS/Pages/default.aspx
Disallow: /mba/admissions/svmp/Pages/default.aspx
Disallow: /mba/admissions/waitlist/Pages/default.aspx
Disallow: /mba/admissions/interviews
Disallow: /mba/admissions/interviews/
Disallow: /mba/admissions/2-plus-2-interviews
Disallow: /mba/admissions/2-plus-2interviews/
Disallow: /mba/cost-of-attendance-class-of-2022.aspx
Disallow: /openforum/openforum.hbs.org/challenge/cdilemma
Disallow: /openforum/openforum.hbs.org/challenge/alumni-board-ideas
Disallow: /openforum/openforum.hbs.org/challenge/managing-health-care-delivery-2015-2016
Disallow: /openforum/openforum.hbs.org/challenge/dilemma
Disallow: /openforum/openforum.hbs.org/index.html

Sitemap: http://www.hbs.edu/sitemap.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 22 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
hbs.edu — 31 years, 1 months old, hosted on HARVARD-UNIV - Harvard University, US
PASS
hbs.edu — 31 years, 1 months old, hosted on HARVARD-UNIV - Harvard University, US
Info::
Domain registered until Jul 31, 2026 (3 months remaining)
Info::
Hosting: HARVARD-UNIV - Harvard University, US
Got: AS1742
Domain expiry

15 days

July 31, 2026

SSL certificate

138 days

Issued by Internet2

Domain age

31 years, 1 months

Registered August 25, 1995

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

HARVARD-UNIV - Harvard University, US

ASN AS1742

128.103.124.107

Registrar

Registrar unknown

Lock status unknown 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
Registrar
Created August 25, 1995 (31 years, 1 months ago)
Expires July 31, 2026 (3 months)
Last Updated February 26, 2026
Name Servers ns3-38.azure-dns.org, ns4-38.azure-dns.info, ns2-38.azure-dns.net, ns1-38.azure-dns.com
Registrant Harvard Business School
Hosting
IP Address 128.103.124.107
ASN AS1742 (HARVARD-UNIV - Harvard University, US)
Provider HARVARD-UNIV - Harvard University, US
Data source: whois (1.0s)
A
HTTP Probe Timing
Total 443 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
40 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
99 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
204 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
443 ms
Total Time Total request time from DNS lookup through full response.
443 ms

Connection waterfall

DNS Lookup 40 ms TCP Connect 99 ms TLS Handshake 204 ms Server Processing 100 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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