Skip to content
https://bris.ac.uk

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
84
GRADE
B
FIX
1
REVIEW
4
PASS
4
INFO
0
Probed from Sao Paulo, Brazil
301 Moved Permanently
Checks
9
4 PASS 4 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
Redirect Chain
1 redirect(s), 2375 ms total
REVIEW
1 redirect(s), 2375 ms total
Info::
Single redirect
Got: https://bris.ac.uk → https://www.bristol.ac.uk/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 2375 ms total
Got: 2375 ms
Info::
Cross-domain redirect detected

https://bris.ac.uk

1239 ms · HTTP/1.0

301

https://www.bristol.ac.uk/

1136 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://bris.ac.uk3011239 msHTTP/1.0BigIP
2https://www.bristol.ac.uk/2001136 msHTTP/1.1Apache

See the visual redirect chain in the HTTP Probe tab →

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
HTTP Probe Timing
Total 932 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
188 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
185 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
374 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
932 ms
Total Time Total request time from DNS lookup through full response.
932 ms

Connection waterfall

DNS Lookup 188 ms TCP Connect 185 ms TLS Handshake 374 ms Server Processing 185 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
176 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

176
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
2 A records, 406 ms lookup
PASS
2 A records, 406 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 137.222.125.159, 137.222.180.159
Info::
No IPv6 (AAAA) records
Info::
3 nameserver(s) configured
Got: irix.bris.ac.uk, ncs.bris.ac.uk, ns3.ja.net
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 (406 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 406 ms
A137.222.125.159, 137.222.180.159
AAAA—
CNAME—
NSirix.bris.ac.uk, ncs.bris.ac.uk, ns3.ja.net
MX
0 bris-ac-uk.mail.protection.outlook.com
TXT
miro-verification=0f7d07a6003bc87a6792cef1c3ac2d135651476d
D6108649-2B05-492B-B655-DBD742861B4F
adobe-idp-site-verification=206237f6c740f0d2ca9689f4ca6321794db6e874f42f33d77fa4...
SPF v=spf1 include:_spf.bristol.ac.uk include:_spfx.bristol.ac.uk include:spf.protec...
QuoVadis=feb90669-531f-4159-8d15-67ddcd4b7e25
ZOOM_verify_WrGbO-1QRZ26Z8m3hp_NJg
apple-domain-verification=n5HcbG8JLfOBLmMa
CAALookup not available with standard resolver
Resolved in 406 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.

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+
Crawlability
robots.txt present, sitemap with 4 URLs
PASS
robots.txt present, sitemap with 4 URLs
Info::
robots.txt is present
Got: 1916 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 4 entries
Info::
Sitemap index with 4 child sitemaps
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 1916 B Sitemaps referenced 0 User-agents Amazonbot, DataForSeoBot, *, ClaudeBot Blocking No — crawling allowed
User-agent: *
Disallow: /cgi-bin/
Disallow: /comment
Disallow: /contact/
Disallow: /dev/
Disallow: /esu/unitprogcat/
Disallow: /unit-programme-catalogue
Disallow: /eopro/
Disallow: /feedback/
Disallow: /fluff/
Disallow: /imagelib/
Disallow: /logs/
Disallow: /news/news-results.html
Disallow: /news/news-search.html?
Disallow: /news/2001/clearing.html
Disallow: /oenology
Disallow: /prospectus/postgraduate/2013/
Disallow: /prospectus/postgraduate/2014/
Disallow: /prospectus/undergraduate/2014/
Disallow: /slink/
Disallow: /sso/login
Disallow: /test/
Disallow: /webcam/sport/archive/
Disallow: /biology/people/person/
Disallow: /composites/media/ICCM17/
Disallow: /composites/media/icons/
Disallow: /composites/media/icshm/
Disallow: /Control_Panel/
Disallow: /Depts/CAS/
Disallow: /depts/CAS/
Disallow: /geography/people/person/
Disallow: /history/customs/resources/
Disallow: /history/customs/datasets/
Disallow: /is/cgi-bin/
Disallow: /is/comment
Disallow: /research/funding/salary_costing/
Disallow: /study/postgraduate/search/research_interests
Disallow: /study/postgraduate/search/search_results
Disallow: /study/undergraduate/search/search_results
Disallow: /media-library/sites/alspac/migrated/documents/
Disallow: /it-services/advice/operatingsystems/mac/archive
Disallow: /it-services/applications/collaboration/office/outlook/
Disallow: /it-sysdev/out-of-service/
Disallow: /it-sysdev/maintenance/
# AFAIK only Googlebot understands these
Disallow: /*/comment$
Disallow: /*/comment?url
Disallow: /*/feedback$
Disallow: /*/news-results.html
Disallow: /*/news-search.html?
Disallow: /*/safe/
# Added by Dave, 2024-05-20 [Master Incident: 216543, DSI-2731: DDOS type traffic to UPC]
User-agent: ClaudeBot
Disallow: /unit-programme-catalogue
#UPC P2 incident 47754 - block Amazonbot agent
User-agent: Amazonbot
Disallow: /unit-programme-catalogue
User-agent: DataForSeoBot
Disallow: /unit-programme-catalogue
sitemap.xml 200 OK
Type Sitemap Index URLs 4 entries Valid XML Yes
Child Sitemaps:
A
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

301https://www.bris.ac.uk/
200https://bris.ac.uk/

Preferred variant: non-www

HTTP → HTTPS

302http://bris.ac.uk/ → https://bris.ac.uk/

Use 301 (permanent) instead of 302 (temporary)

A+
Domain Intelligence
bris.ac.uk — via No registrar listed. This domain is directly registered with Nominet., hosted on JANET Jisc Services Limited, GB
PASS
bris.ac.uk — via No registrar listed. This domain is directly registered with Nominet., hosted on JANET Jisc Services Limited, GB
Info::
Registrar: No registrar listed. This domain is directly registered with Nominet.
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: JANET Jisc Services Limited, GB
Got: AS786
Domain expiry

Unknown

SSL certificate

176 days

Issued by Sectigo Limited

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

JANET Jisc Services Limited, GB

ASN AS786

137.222.125.159

Registrar

No registrar listed. This domain is directly registered with Nominet.

Unlocked 7 NS records
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar No registrar listed. This domain is directly registered with Nominet.
Name Servers ns0.ja.net, ns2.ja.net, ns3.ja.net, ns4.ja.net, auth03.ns.uu.net, ns1.surfnet.nl, dns-3.dfn.de
Registrant The JNT Association
Hosting
IP Address 137.222.125.159
ASN AS786 (JANET Jisc Services Limited, GB)
Provider JANET Jisc Services Limited, GB
Data source: whois (2.2s)

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

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback