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92
Total
100
DNS
80
Email
88
Security
85
Network
100
Availability
Domaintu-chemnitz.de
IPv41
IPv61
MX records2
StatusActive
Domain technical report

Technische Universität Chemnitz

tu-chemnitz.de

Technische Universität Chemnitz

Generated: 2026-08-09T12:17:36-05:00 · Cached result

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IPv41
IPv61
MX2
NS4

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

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

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

2 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-STS5 / 5 pts · Mail

Mail transport policy.

✓
TLS-RPT5 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

48 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers23 / 35 pts · Security

6 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: cgi.tu-chemnitz.de

i
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/1.1 200 OK

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
134.109.133.7

AAAA

1 record(s)
2001:638:911:b01:134:109:133:7

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
1 ezra.hrz.tu-chemnitz.de.
1 kyle.hrz.tu-chemnitz.de.

TXT

2 record(s)
"google-site-verification=5XIMxbUxIRiPJF7IuWJWFq3TVhk-h8nQZ8aW_OqkPO8"
"v=spf1 ip4:134.109.229.63 ip4:134.109.229.193 ip6:2001:638:911:b0e:134:109:229:63 ip6:2001:638:911:b0e:134:109:229:193 include:_spf.o155.mx.srv.dfn.de ~all"

NS

4 record(s)
dns-3.dfn.de.
eris.hrz.tu-chemnitz.de.
secondary.rrze.uni-erlangen.de.
ceres.hrz.tu-chemnitz.de.

SOA

1 record(s)
ceres.hrz.tu-chemnitz.de. hostmaster.tu-chemnitz.de. 2021739249 10800 3600 2419200 3600

CAA

7 record(s)
0 issuewild "pki.dfn.de"
0 issue "pki.dfn.de"
0 issue "letsencrypt.org"
0 iodef "mailto:ca@hrz.tu-chemnitz.de"
0 issue "harica.gr"
0 issuewild "letsencrypt.org"
0 issuewild "harica.gr"

DS

1 record(s)
1039 8 2 E744BA263B897D1C96CC2DD3741D35F6D352E19EC117DC285DE7687C 627DB021

DNSKEY

2 record(s)
256 3 8 AwEAAc5oZf8F9kn9XHN/qDM15OtdyIJWQr4Di1ZdeFl3EpPk8dT+bUKP +IYGPuPJaS42hkM8+MP2TiGZVxsc/GzXkxczcolKllVkQn5zhqWIT0qe JzMaR/C8Fd65PIjksI9NQMRLbc7m77wIQGaN3oB9kruPDJLSRvE+N6w0 aYYDxAtww7x0SjpzXAUZX99sgYosus1zXYqbZ0v4Z+Q9spwYAgs49CW4 DeFu6qidiF/pfYp8KhSFZL28dvuC80IEvlGJt8CYgLtFA6D1zVajxjUD sCK1L0PXIM81QQVpiq9E05myK9eJ0SbJEWC/mkryvDrFDZuW7q2lkl8y Cu5ykEhCwSU=
257 3 8 AwEAAcbbrg+QWHVEJG4B9oUJ8Vwr3Dvr9Qa6547FB6b6OFGqXLxSv3TM K56zBiKrE9gFEXVOVsSvMw2wHkAJL6hqiTsfn0uFOpoU0SpriL2YBBiO GuUUV7sn0PKOwaY8ZbKqmSp3uRdIpDlRCp7HxuIDipMKTbl3GYfqZFPO IhRpUEMw9f0R54fGqDo5K7gva0+6pZZF9oZSqtAXkCt87eeue747EU0/ DIB0xlGrNlmzXybvOWVdHko/e8UxIyOGMA6ZoPA+odHe/2eYKrVu00Df CB5qN+ABr/CcUTMODFEfBpTJz/M0A22xg82A4P4G99TpbNSqRzrUJ9BV vt6UfcdqUeU=

RRSIG

6 record(s)
SOA 8 2 86400 20260823171030 20260809161030 40654 tu-chemnitz.de. AzzprKZvDtuK0UHV5tU5iUwfn9z98IjTctHaPTIQJ1wYCPVT1C9LBEVb jVhXKAoHNghPY35G0DIEMdcpbUzXHxcQ0gyly3DV0Lm7xCYJPCv7PxJS srRoG3G0tjNxqal8tbAJNPbDsjuY8bYXca5UpTa1KD3zH5zag4tyOb/J oEkjUEdDIKb1Ie7jh84wW0YfVwyppq+pZc5wEHLCPIGRH8/6KZ0qgGBQ a+F2/gIk/NstxUXI7o8aQedxUQBAujXwGx3Lnhd5Z8bIP3YbwF5fClgk ld4XUDifvTglUuD7vT7YC1aUu9bJXc/fdibh86j3x13PaFBygag1DGey CG4MNQ==
TXT 8 2 600 20260816203949 20260802201206 40654 tu-chemnitz.de. b3XyFrihNCzijQFC2KpZPh7DCqEnNHkmmzV2ZbPrIJZEurj1LDxP80BH 9Ysu4XzMnlOPlMCtlr/iBaH0U2Vlh9sTwRdoEfWV/YeZ6xe/CQB1bPxw yKDu2bmCZSS/6sLcUhj5zETZEXJTngajvC4GeCUeoPy/u9BtyB2pBY/M Yf8Pmz2Kd2Y6xpOJnDY1zHE5M2KKsb+rLxbTI+Lk9pr0Lcbcr/dwmHOp +DWMoENmV5U4X6izMty0LOspM8e9hbZ1wtLMl9qDWt/2ImUeFCwQEUSI BKSLbFWguRFW4Zg3I6XiSBhCMVuNs2jWHPnx+6MAQHfGdf5LkZXCo4tx qDVktg==
MX 8 2 86400 20260816203949 20260802201206 40654 tu-chemnitz.de. a8H3uCXT8oEpwY1zdQtPmSfAnTGRK24fQOX1yK3j+HSCZvcVm8RSIsdc KMMEPwfRMT8QJcyb+U13KC+oJB11gzv3bdbSV6KTtWgMlaNZvPhie/VA 27hG5lLez/Domr9UQT/XiH2GtNwyLSkukgd7vspikLGbGqQVxLggB2Up kZADTHU4ScLEUd/4l/i79iMh4fTbbViClMskoEwtLWsKTH4GMAI0Uoqy cbC94JvReEWMJgC97KhLSjj7B21K6ecNsfawQ3gkkvuVnE6NFvuvtsJL x45gnznBn5dj6mcVk52JNYVyTu+JdnqlAslbBeevC5xGRUH3vqmZyjKa mg7aJQ==
NS 8 2 86400 20260816211317 20260802202024 40654 tu-chemnitz.de. NXFicgs8nfKGatQCvN1Lzwuxs8lAtN/ee7+OGAZpxQHq8D66HK5/N+wX v9+RLkAZ2vLHTAyqNl1boeMiuUdZenlYIboWtLXHk/nfo9zUIeiEk8Ly qQPHtiTCUXHtM2ll5rhuY7zaGcKPWCwmBRiQMH53rQEeEOVA6YBDLMWq 4RJLmTt6XJHN+DaJ3/pRJKrLJ3Y/n9rRypNR1zpy7kamx1IckjYSZ82/ TPwkr2SXzTSF8dDjKsimqhFHUJ6kcTQGnnJHRi1fH4cDcma9fMlBZG/e 6jytiyGYHU9DXum/MrrzCBvkFqOoFQ3ArfVqgu3DJzeaqoJXnr7eKpdV 6IDYSQ==
DS 8 2 86400 20260817120903 20260803103903 32911 de. NYbMl+XI1T3nGCR107RN1dW/viLpFeHIBwDBOpWmje1SBnJUlPZlGhcx HtShwpI28AxVMsUhCmmvCEAPmtr3VKf3e8Vfb9oqKYvM1Ly5Mv6Urw08 tTPPoXob1/9XQnpINQhY+RoxZzB3bJiVptBOQPGOb0QgZLYBkdxxOHKq apQ=
CAA 8 2 600 20260816192723 20260802190448 40654 tu-chemnitz.de. UpqPnzvKRN9P5W0Ugh6FtgKzyaHOsDqdZzzemmBP/kkJ9PPuEWkY/OH/ ebEW5OOIINRE0lpWMXN0KFCgnNB5Ssev7C8wXQQi0mrLisGmdoDtOxKH xUg9jVXjyF3O/+kx0hH3HgRNCzFHisTgNd4l+AGttuCVxGgcAM2a/JKh BNnh0KXlR1R+We65KO/sza2Kf2CtAdvDMXwRr8ccYx7RfjifM3W2dOmd //wiyghSlgFJAZfZR/bheNAh6TfMNKtVISNfJSzuhLdymXBspwwl4md/ ViRCwe5MsCfhkmzMalfOkqsBrGH4gU6lDDzZKAJI21D/xqvdBbhsDpkz zmzd3g==

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.

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 ip4:134.109.229.63 ip4:134.109.229.193 ip6:2001:638:911:b0e:134:109:229:63 ip6:2001:638:911:b0e:134:109:229:193 include:_spf.o155.mx.srv.dfn.de ~all

DMARC

Configured
v=DMARC1; p=none; rua=mailto:dmarc-reports@hrz.tu-chemnitz.de

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
Technische Universität Chemnitz
Description
Technische Universität Chemnitz
Final URL
https://www.tu-chemnitz.de/
HTTP status
206

HTTP

Status
HTTP/1.1 200 OK
Final URL
https://www.tu-chemnitz.de/
Version
2
Server
Apache
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
tu-chemnitz.de
Valid from
2026-06-28T19:16:46-05:00
Valid until
2026-09-26T19:16:45-05:00
Days remaining
48
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

6 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
—
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
134.109.133.7
35,78 ms
Cloudflare
1.1.1.1
134.109.133.7
307,05 ms
Quad9
9.9.9.9
134.109.133.7
50,36 ms
OpenDNS
208.67.222.222
134.109.133.7
452,60 ms
AdGuard
94.140.14.14
134.109.133.7
145,56 ms

IP, geolocation and ASNAssociated network information

134.109.133.7

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

ezra.hrz.tu-chemnitz.de

Port 25: Closed/unreachable - 1.3 ms - 
Port 465: Closed/unreachable - 4021.1 ms - 
Port 587: Closed/unreachable - 4020.7 ms -

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