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Total

DNS

Email

Security

Network

100

Availability

Domaintu-bs.de

IPv41

IPv61

MX records3

StatusActive

Domain technical report

Technische Universität Braunschweig

tu-bs.de

Generated: 2026-08-10T16:53:15-05:00 · Cached result

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IPv41

IPv61

MX3

NS3

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

3 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

3 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-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

179 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: tu-bs.de

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 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)

134.169.9.1

AAAA

1 record(s)

2001:638:602:f004::2

CNAME

0 record(s)

—

Not configured

MX

3 record(s)

10 c1991.mx.srv.dfn.de.
10 a1991.mx.srv.dfn.de.
10 b1991.mx.srv.dfn.de.

TXT

7 record(s)

"_telesec-domain-validation=336084_2025-05-09_srxBSiyhpe4ihOqOUMtHMIwONlLhBcJO5CB24HCqK4gTRggy5G"
"HARICA-fWnjdLp10dOkZq3dwQZ"
"83fbd8eee9d9f02cc07478e05151bae1"
"adobe-idp-site-verification=a03944d1f2ea68afe93f653b6e9621cd261ba07ea8cdeb5376757864cd72f553"
"cisco-ci-domain-verification=63a4857df37f990f6ee5e62ae44de0ffe10e34eddded04543a245cdc3c76a9e5"
"v=spf1 ip4:134.169.4.128/26 ~all"
"MS=ms41660813"

NS

3 record(s)

rzdnssecond.rz.tu-bs.de.
rzdnsprime.rz.tu-bs.de.
deneb.dfn.de.

SOA

1 record(s)

rzdnsprime.rz.tu-bs.de. noc.tu-bs.de. 706290771 21600 3600 1814400 10800

CAA

5 record(s)

0 issue "telesec.de"
0 issue "harica.gr"
0 issuewild "harica.gr"
0 issue "pki.dfn.de"
0 issuewild "pki.dfn.de"

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

1 record(s)

100 10 "s" "x-eduroam:radius.tls" "" _radsec._tcp.eduroam.de.tu-bs.de.

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 ip4:134.169.4.128/26 ~all

DMARC

Configured

v=DMARC1;p=none;pct=100;rua=mailto:mailauth-reports@tu-braunschweig.de;ruf=mailto:mailauth-reports@tu-braunschweig.de;adkim=r;aspf=r

DKIM

Selector mail

v=DKIM1;k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC/XSE9C6O1xmmrkR/GexRrdNcU5abFUSGKVghKVa9Goy4CGPAO4eqPgdDdOBD9oZsAO8ptB1/jLFthxB42eH4vXLaBDMiyVCHpWU3kQPefCuptsxZATjE5cRlqWykt9Hy7x5CgPkLLRa3PYCgki9dWdItmpJoymycWn2s6WYRujwIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Technische Universität Braunschweig

Description

Final URL

https://www.tu-braunschweig.de/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.tu-braunschweig.de/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Hellenic Academic and Research Institutions CA

www.tu-bs.de

Valid from

2026-07-22T12:38:25-05:00

Valid until

2027-02-06T11:38:24-06:00

Days remaining

179

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

4 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

✓

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

134.169.9.1

159,41 ms

Cloudflare

1.1.1.1

134.169.9.1

408,81 ms

Quad9

9.9.9.9

134.169.9.1

412,78 ms

OpenDNS

208.67.222.222

134.169.9.1

151,77 ms

AdGuard

94.140.14.14

134.169.9.1

2.160,40 ms

IP, geolocation and ASNAssociated network information

134.169.9.1

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

c1991.mx.srv.dfn.de

Port 25: Closed/unreachable - 120.3 ms - 
Port 465: Closed/unreachable - 4001.6 ms - 
Port 587: Closed/unreachable - 4131.5 ms -

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