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https://sfsu.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
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.sfsu.edu/
200https://sfsu.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

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

Consistent

B
HTTP Probe Timing
Total 1191 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
1.19 s
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.
4 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
1.19 s
Total Time Total request time from DNS lookup through full response.
1.19 s

Connection waterfall

DNS Lookup 1.19 s TCP Connect 0 ms TLS Handshake 4 ms Server Processing 2 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
68 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

68
days left
0d 30d 60d 90d+

Recommended actions

  • 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, 1177 ms lookup
PASS
1 A records, 1177 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 23.185.0.4
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2620:12a:8001::4, 2620:12a:8000::4
Info::
5 nameserver(s) configured
Got: ns1.sfsu.edu, ns4.cenic.org, ns5.cenic.org, ns6.cenic.org, ns2.sfsu.edu
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
Warning::
DNS resolution is slow (1177 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 1177 ms
A23.185.0.4
AAAA2620:12a:8001::4, 2620:12a:8000::4
CNAME—
NSns1.sfsu.edu, ns4.cenic.org, ns5.cenic.org, ns6.cenic.org, ns2.sfsu.edu
MX
0 sfsu-edu.mail.protection.outlook.com
TXT
geneious.com:domain-verification=jjoJZgSXQjwIj81os85wqw
adobe-idp-site-verification=f02e747d9e2e56b7ae34612a76aedabb5155429217b4cd943194...
smartsheet-site-validation=ha9wP89lo6rhPeOfQ3NYuSn7wbiegewE
canva-site-verification=QcBWYwAYILmBUomGgDInYA
SPF v=spf1 include:_spf1.sfsu.edu include:_spf2.sfsu.edu include:spf.protection.outl...
airtable-verification=ad937cbf93f5caf63abaae3796e7b426
have-i-been-pwned-verification=4c80242a38bf005b23e3a53e2a2d7f88
teamviewer-sso-verification=c67318170dc94bb19e5dff2063724c87
0UF8JKB3YJCE43G1WTXHE8GO2CEBNWFA4D63EGZ5V
docusign=eb1bc058-9abb-41e3-9898-a5caa7b2e111
airtable-verification=d01e396a4d69a0f8846474a4b072a999
CAALookup not available with standard resolver
Resolved in 1177 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), 414 ms total
PASS
1 redirect(s), 414 ms total
Info::
Single redirect
Got: https://sfsu.edu → https://www.sfsu.edu/ (301)
Info::
WWW normalization redirect

https://sfsu.edu

115 ms · HTTP/1.1

301

https://www.sfsu.edu/

300 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://sfsu.edu301115 msHTTP/1.1Pantheon
2https://www.sfsu.edu/200300 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2620:12a:8001::4, 2620:12a:8000::4
Got: 1 ms connect
IPv6 Ready
AAAA Records 2620:12a:8001::4, 2620:12a:8000::4 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 346 URLs
PASS
robots.txt present, sitemap with 346 URLs
Info::
robots.txt is present
Got: 2027 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 346 entries
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 2027 B Sitemaps referenced 0 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
sitemap.xml 200 OK
Type URL Set URLs 346 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
sfsu.edu — 37 years, 3 months old
PASS
sfsu.edu — 37 years, 3 months old
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Domain expiry

410 days

July 31, 2027

SSL certificate

68 days

Issued by Let's Encrypt

Domain age

37 years, 3 months

Registered August 2, 1989

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2620:12a:8000::4

Registrar

Registrar unknown

Lock status unknown 5 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created August 2, 1989 (37 years, 3 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated July 16, 2024
Name Servers ns1.sfsu.edu, ns4.cenic.org, ns5.cenic.org, ns6.cenic.org, ns2.sfsu.edu
Registrant San Francisco State University
Hosting
IP Address 2620:12a:8000::4
Data source: whois (0.6s)
A+
CDN & Delivery
Fastly (HIT)
PASS
Fastly (HIT)
Info::
Site is served via Fastly CDN
Got: x-served-by: cache-toj-leto2350070-TOJ
Info::
CDN cache status: HIT
CDN Detected: Fastly
Provider Fastly Cache Status HIT Evidence x-served-by: cache-toj-leto2350070-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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