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68
Total
75
DNS
75
Email
73
Security
35
Network
60
Availability
Domainsherpa.ac.uk
IPv42
IPv60
MX records1
StatusActive
Domain technical report

Jisc - Error 403

sherpa.ac.uk

Web page blocked error page

Generated: 2026-08-10T07:09:29-05:00 · Cached result

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IPv42
IPv60
MX1
NS4

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

!
DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

1 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

88 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers8 / 35 pts · Security

2 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓
IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

!
IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

!
HTTP response0 / 40 pts · Availability

HTTP/2 403

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)
104.18.31.127
104.18.30.127

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

1 record(s)
0 sherpa-ac-uk.mail.protection.outlook.com.

TXT

3 record(s)
"QuoVadis=d08bd3ed-22ed-4a05-b862-360d39cf6682"
"v=spf1 -all"
"MS=ms30362276"

NS

4 record(s)
ns-725.awsdns-26.net.
ns-362.awsdns-45.com.
ns-1225.awsdns-25.org.
ns-1757.awsdns-27.co.uk.

SOA

1 record(s)
ns-1757.awsdns-27.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

9 record(s)
0 issuewild "ssl.com"
0 iodef "mailto:information.security@jisc.ac.uk"
0 issue "letsencrypt.org"
0 issuewild "letsencrypt.org"
0 issue "ssl.com"
0 issue "amazontrust.com"
0 issuewild "amazontrust.com"
0 issuewild "sectigo.com"
0 issue "sectigo.com"

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 -all

DMARC

Configured
v=DMARC1; p=reject; rua=mailto:janet.dmr@ja.net

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Jisc - Error 403
Description
Web page blocked error page
Final URL
https://sherpa.ac.uk/
HTTP status
403

HTTP

Status
HTTP/2 403
Final URL
https://sherpa.ac.uk/
Version
3
Server
cloudflare
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
sherpa.ac.uk
Valid from
2026-08-08T11:21:17-05:00
Valid until
2026-11-06T10:21:16-06:00
Days remaining
88
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

2 active
—
HSTSNot detected
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
—
Permissions PolicyNot detected
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
104.18.30.127, 104.18.31.127
85,97 ms
Cloudflare
1.1.1.1
104.18.30.127, 104.18.31.127
106,04 ms
Quad9
9.9.9.9
104.18.30.127, 104.18.31.127
192,75 ms
OpenDNS
208.67.222.222
104.18.30.127, 104.18.31.127
189,93 ms
AdGuard
94.140.14.14
104.18.30.127, 104.18.31.127
239,05 ms

IP, geolocation and ASNAssociated network information

104.18.31.127

No data
success
No
country
region
city
asn
organization
isp

104.18.30.127

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

sherpa-ac-uk.mail.protection.outlook.com

Port 25: Closed/unreachable - 34.3 ms - 
Port 465: Closed/unreachable - 4041.5 ms - 
Port 587: Closed/unreachable - 4007.8 ms -

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