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https://vt.edu

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
GRADE
A
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.

B
Crawlability
robots.txt present, no sitemap
REVIEW
robots.txt present, no sitemap
Info::
robots.txt is present
Got: 3087 bytes
Info::
No sitemap.xml found
A sitemap helps search engines discover and index your pages more efficiently.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

A sitemap helps search engines discover and index your pages more efficiently.

Why this matters

No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.

Learn more ▾

A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.

Source: sitemaps.org / Google Search Central

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 3087 B Sitemaps referenced 0 User-agents SemrushBot, meta-externalagent, facebookexternalhit, *, bingbot Blocking No — crawling allowed
User-agent: bingbot

Disallow: /test/*

Disallow: /test.html

Disallow: */admissions/*do-not-crawl

Disallow: /admissions/*_old

Disallow: /admissions/*_ref_

Disallow: /admissions/*_remove_

Disallow: /admissions/info

Disallow: /admissions/error

Disallow: /admissions/undergraduate/redirect*

Disallow: /admissions/undergraduate/sandbox*

Disallow: /admissions/undergraduate/visit/*update.html

Disallow: /admissions/undergraduate/visit/*cancel.html

Disallow: /admissions/undergraduate/visit/*reprint.html

Disallow: /admissions/undergraduate/visit/hokiefocus/closed.html

Disallow: /admissions/undergraduate/visit/hokiepreview/closed.html

Disallow: /admissions/undergraduate/visit/gateway/closed.html

Disallow: /admissions/undergraduate/visit/fallvisitation/closed.html

Disallow: /admissions/undergraduate/visit/openhouse/closed.html

Disallow: /admissions/undergraduate/apply/freshmen/secondchoicemajor-us.html

Disallow: /innovationcampus/Ref.html
Disallow: /150/*

Crawl-delay: 10

User-agent: SemrushBot

Disallow: /test/*

Disallow: /test.html

Disallow: */admissions/*do-not-crawl

Disallow: /admissions/*_old

Disallow: /admissions/*_ref_

Disallow: /admissions/*_remove_

Disallow: /admissions/info

Disallow: /admissions/error

Disallow: /admissions/undergraduate/redirect*

Disallow: /admissions/undergraduate/sandbox*

Disallow: /admissions/undergraduate/visit/*update.html

Disallow: /admissions/undergraduate/visit/*cancel.html

Disallow: /admissions/undergraduate/visit/*reprint.html

Disallow: /admissions/undergraduate/visit/hokiefocus/closed.html

Disallow: /admissions/undergraduate/visit/hokiepreview/closed.html

Disallow: /admissions/undergraduate/visit/gateway/closed.html

Disallow: /admissions/undergraduate/visit/fallvisitation/closed.html

Disallow: /admissions/undergraduate/visit/openhouse/closed.html

Disallow: /admissions/undergraduate/apply/freshmen/secondchoicemajor-us.html

Disallow: /innovationcampus/Ref.html
Disallow: /150/*

Crawl-delay: 10

User-agent: meta-externalagent

Allow: /

Crawl-delay: 10

User-agent: facebookexternalhit

Allow: /

Crawl-delay: 10

User-agent: *

Disallow: /test/*

Disallow: /test.html

Disallow: */admissions/*do-not-crawl

Disallow: /admissions/*_old

Disallow: /admissions/*_ref_

Disallow: /admissions/*_remove_

Disallow: /admissions/info

Disallow: /admissions/error

Disallow: /admissions/undergraduate/redirect*

Disallow: /admissions/undergraduate/sandbox*

Disallow: /admissions/undergraduate/visit/*update.html

Disallow: /admissions/undergraduate/visit/*cancel.html

Disallow: /admissions/undergraduate/visit/*reprint.html

Disallow: /admissions/undergraduate/visit/hokiefocus/closed.html

Disallow: /admissions/undergraduate/visit/hokiepreview/closed.html

Disallow: /admissions/undergraduate/visit/gateway/closed.html

Disallow: /admissions/undergraduate/visit/fallvisitation/closed.html

Disallow: /admissions/undergraduate/visit/openhouse/closed.html

Disallow: /admissions/undergraduate/apply/freshmen/secondchoicemajor-us.html

Disallow: /innovationcampus/Ref.html
Disallow: /150/*
sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

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.vt.edu/
200https://vt.edu/

Inconsistent — duplicate content risk

HTTP → HTTPS

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

Consistent

B
TLS Certificate Expiry & Recommendations
268 days until leaf cert expires — 5 issues to address
REVIEW

Certificate validity

268
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 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, 114 ms lookup
PASS
1 A records, 114 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 198.82.215.14
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2607:b400:92:26:0:97:1e7:3947
Info::
4 nameserver(s) configured
Got: clature.cns.vt.edu, auth1.dns.cogentco.com, auth2.dns.cogentco.com, nomen.cns.vt.edu
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: 114 ms
Got: 114 ms
A198.82.215.14
AAAA2607:b400:92:26:0:97:1e7:3947
CNAME—
NSclature.cns.vt.edu, auth1.dns.cogentco.com, auth2.dns.cogentco.com, nomen.cns.vt.edu
MX
10 ASPMX.L.GOOGLE.COM
20 ALT2.ASPMX.L.GOOGLE.COM
20 ALT1.ASPMX.L.GOOGLE.COM
30 ALT3.ASPMX.L.GOOGLE.COM
30 ALT4.ASPMX.L.GOOGLE.COM
TXT
TAILSCALE-qXVdP7FvyR0BIXkDU6fS
facebook-domain-verification=o361an7jijh586jgybynmv8u73lpyr
adobe-idp-site-verification=8831eb02a0e2d029e1a8f532f70788b5bbe9caa73bcaf151393e...
jamf-site-verification=ScOG2GWDsPjwHOn_xmWyFQ
SPF v=spf1 ip4:128.173.0.0/16 ip4:198.82.0.0/16 ip6:2001:468:c80::/48 ip6:2607:b400:...
apple-domain-verification=uplwVwTtQ5M7cYOY
MS=ms15905841
MS=ms89795818
atlassian-domain-verification=ashSRaJVLl2E9xl1egBPOysp5ja/vIXBZyUyUFF8uJNabZqdH2...
fZeSGIGyGo0lhtHPHmPr5qgf9EsfOOsrW573IJd9ZmDfb4I2J+I2WrsKc97+xLB/nE9n20tPvB28osvI...
CAALookup not available with standard resolver
Resolved in 114 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), 526 ms total
PASS
1 redirect(s), 526 ms total
Info::
Single redirect
Got: https://vt.edu → https://www.vt.edu/ (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 526 ms total
Got: 526 ms

https://vt.edu

404 ms · HTTP/1.1

301

https://www.vt.edu/

122 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://vt.edu301404 msHTTP/1.1Apache
2https://www.vt.edu/200122 msHTTP/1.1Apache

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (100 ms)
PASS
IPv6 reachable (100 ms)
Info::
IPv6 is configured and reachable at 2607:b400:92:26:0:97:1e7:3947
Got: 100 ms connect
IPv6 Ready
AAAA Records 2607:b400:92:26:0:97:1e7:3947 Connection Reachable (100 ms)
A+
Domain Intelligence
vt.edu — 38 years, 11 months old
PASS
vt.edu — 38 years, 11 months old
Info::
Domain registered until Jul 31, 2027 (1 years, 3 months remaining)
Domain expiry

380 days

July 31, 2027

SSL certificate

268 days

Issued by Internet2

Domain age

38 years, 11 months

Registered November 18, 1987

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2607:b400:92:26:0:97:1e7:3947

Registrar

Registrar unknown

Lock status unknown 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar
Created November 18, 1987 (38 years, 11 months ago)
Expires July 31, 2027 (1 years, 3 months)
Last Updated January 21, 2026
Name Servers auth1.dns.cogentco.com, clature.cns.vt.edu, nomen.cns.vt.edu, auth2.dns.cogentco.com
Registrant Virginia Polytechnic Institute and State University
Hosting
IP Address 2607:b400:92:26:0:97:1e7:3947
Data source: whois (0.8s)
A
HTTP Probe Timing
Total 522 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
117 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
100 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
205 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
523 ms
Total Time Total request time from DNS lookup through full response.
523 ms

Connection waterfall

DNS Lookup 117 ms TCP Connect 100 ms TLS Handshake 205 ms Server Processing 101 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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