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Total

DNS

100

Email

Security

Network

100

Availability

Domainuni-potsdam.de

IPv41

IPv60

MX records4

StatusActive

Domain technical report

Universität Potsdam

uni-potsdam.de

Wo Wissen wächst: Die Universität Potsdam punktet mit einer besonderen Vielfalt an Studienmöglichkeiten und einem ausgeprägten interdisziplinären Forschungsprofil.

Generated: 2026-08-09T11:54:16-05:00 · Cached result

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IPv41

IPv60

MX4

NS4

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

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 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.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

✓

MTA-STS5 / 5 pts · Mail

Mail transport policy.

✓

TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

181 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers4 / 35 pts · Security

1 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: n-cmsv13-prod.rz.uni-potsdam.de

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)

141.89.239.5

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

4 record(s)

20 smtpin2.uni-potsdam.de.
10 smtpin.uni-potsdam.de.
40 mx1.uni-potsdam.de.
50 mx2.uni-potsdam.de.

TXT

8 record(s)

"HARICA-ZbuCl6xDcK1Wli4u6eD"
"ab4be8ed12551736a76278b3402d8559"
"apple-domain-verification=Gh1qmp8sA17o8ZvN"
"_telesec-domain-validation=349631_2025-11-17_HNwcLkh03Ddy1qHs7A6aygcEJNVEHPiUW7N7R7Bnw0DvKHUiLu"
"v=spf1 ip4:141.89.0.0/16 -all"
"google-site-verification=bvFklgX2769oDkgPohNT--p0EbinjjxjiPBYhYIeyB8"
"MS=45E3C90905CC87EE8DF150679F8ADA75DAEBF47B"
"google-site-verification=ZPdU16_maEnCAzHFl-8Bvx9SKmjCDC4CnJ80hVWQBRU"

NS

4 record(s)

dns-3.dfn.de.
ns1.uni-potsdam.de.
deneb.dfn.de.
ns2.uni-potsdam.de.

SOA

1 record(s)

ns1.uni-potsdam.de. root.rz.uni-potsdam.de. 2024121261 10800 3600 2419200 900

SPF

Configured

v=spf1 ip4:141.89.0.0/16 -all

DMARC

Configured

v=DMARC1; p=quarantine; rua=mailto:dmarc@ryncdhpn.uriports.com; ruf=mailto:dmarc@ryncdhpn.uriports.com; fo=1:d:s; adkim=r; aspf=r;

DKIM

Selector selector1

v=DKIM1; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5h4qsCkLcGdWmoKbrjiZ1uz66eapKBCQGZPBoACgKw2ZtPP29yYCgXyLJ+BcQ3+8iM/nn8LD4OwWKsrFe/fs3kt/A1MIMHBo+WL+BqfPaLjrhKYpbXw/UmXHSdO51Y4cZGJVzR9VHtbgoXSNY172A87CAZVVLuY8JtnQ4Iu0Mk5Oe2rSUN9RFYXkTuNlRhfGs9ZRtKfY6yDPHa8GBE9CJ5PY1Rf78YPpl7+fSKSckVGwFZy28t91GkOxn/zsxZuVKakFTL8DpbxFB6e6tCb92mhYNg1WTHG7p9eVhy15CkRU6MRH4kQqlC09mmqdcCcNDJzSi1Q+vm4TD+8+VEvTWQIDAQAB;

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Universität Potsdam

Description

Wo Wissen wächst: Die Universität Potsdam punktet mit einer besonderen Vielfalt an Studienmöglichkeiten und einem ausgeprägten interdisziplinären Forschungsprofil.

Final URL

https://www.uni-potsdam.de/de

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.uni-potsdam.de/de

Version

Server

Apache

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Hellenic Academic and Research Institutions CA

www.cmsv13-prod.rz.uni-potsdam.de

Valid from

2026-07-22T15:27:24-05:00

Valid until

2027-02-06T14:27:23-06:00

Days remaining

181

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

1 active

—

HSTSNot detected

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

—

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

141.89.239.5

41,06 ms

Cloudflare

1.1.1.1

141.89.239.5

149,54 ms

Quad9

9.9.9.9

141.89.239.5

295,88 ms

OpenDNS

208.67.222.222

141.89.239.5

31,76 ms

AdGuard

94.140.14.14

141.89.239.5

328,71 ms

IP, geolocation and ASNAssociated network information

141.89.239.5

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

smtpin2.uni-potsdam.de

Port 25: Closed/unreachable - 120.5 ms - 
Port 465: Closed/unreachable - 4116.8 ms - 
Port 587: Closed/unreachable - 4019.9 ms -

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