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72
Total
70
DNS
65
Email
65
Security
50
Network
100
Availability
Domainuni-freiburg.de
IPv41
IPv60
MX records4
StatusActive
Domain technical report

Universität Freiburg

uni-freiburg.de

Generated: 2026-08-09T02:17:18-05:00 · Cached result

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IPv41
IPv60
MX4
NS5

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

5 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 policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

4 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

72 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

!
HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: uni-freiburg.de

i
IPv4 diversity20 / 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 response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
132.230.100.27

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

4 record(s)
10 mail.uni-freiburg.de.
10000 c1421.mx.srv.dfn.de.
10000 b1421.mx.srv.dfn.de.
10000 a1421.mx.srv.dfn.de.

TXT

5 record(s)
"google-site-verification=Vmg2FTPU-8yUc5cMSy3XntSi1boVx0Q6dqplocYxn30"
"MS=81DEE9388292FA746C934DEF6BF6AC5DCCB3D1FA"
"v=spf1 redirect=_spf.uni-freiburg.de"
"google-site-verification=eqlVEdB0u6eYcRagQAoGlLJLBTWMuaV0XZMcDpbuUtU"
"MS=ms98325981"

NS

5 record(s)
dns0.fun.uni-freiburg.de.
dns5.belwue.de.
dns1.fun.uni-freiburg.de.
dns1.belwue.de.
dns3.belwue.de.

SOA

1 record(s)
dhcp.fun.uni-freiburg.de. hostmaster.rz.uni-freiburg.de. 1190830530 10800 3600 2419200 900

CAA

0 record(s)
—

Not configured

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 redirect=_spf.uni-freiburg.de

DMARC

Not configured
—

Not configured

DKIM

Selector s1
v=DKIM1; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3vnerplKmg0ZUy7TrHtfNuQ1ACjLjOnTUcmEe+nhDxfeRI84AMFfki4FXcuNhMdotd67P6R5AlECBZCC4pABOjXOxyptJ/e+3lweFt+SmN6Nt1TQXhF2xy7y3E+ot4cucTOVCRJC152LVw7XDyRSXVatIN41pUnrROX/raE3c0QIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Universität Freiburg
Description
Final URL
https://uni-freiburg.de/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://uni-freiburg.de/
Version
3
Server
Apache
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Hellenic Academic and Research Institutions CA
CN
uni-freiburg.de
Valid from
2025-10-20T02:43:22-05:00
Valid until
2026-10-20T02:43:22-05:00
Days remaining
72
Protocol
TLSv1.3
Cipher
TLS_AES_128_GCM_SHA256

Security headers

0 active
—
HSTSNot detected
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
Referrer PolicyNot detected
—
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
132.230.100.27
41,42 ms
Cloudflare
1.1.1.1
132.230.100.27
143,87 ms
Quad9
9.9.9.9
132.230.100.27
181,34 ms
OpenDNS
208.67.222.222
132.230.100.27
154,08 ms
AdGuard
94.140.14.14
132.230.100.27
240,33 ms

IP, geolocation and ASNAssociated network information

132.230.100.27

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

mail.uni-freiburg.de

Port 25: Closed/unreachable - 111.8 ms - 
Port 465: Closed/unreachable - 240.4 ms - 
Port 587: Closed/unreachable - 115.2 ms - 220 mail.uni-freiburg.de ESMTP CommuniGate SPEC 8.0.9

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