indexo.dev

uni-duesseldorf.de

.de crawl dns

First seen 2026-04-11 · Last seen 2026-05-19 · ok HTTP 200 7035 ms crawled 2026-05-19

DE · 134.99.128.238 · AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

Reputation 89/100 weak security headers dmarc monitor-only

Registration

Updated
2020-01-09
Name servers
  • dns-1.dfn.de.
  • dns-2.dfn.de.
  • dns-3.dfn.de.
  • selene.rz.uni-duesseldorf.de.
  • sirene.rz.uni-duesseldorf.de.

DNS records live

NS
  • dns-1.dfn.de
  • dns-2.dfn.de
  • dns-3.dfn.de
  • selene.rz.uni-duesseldorf.de
  • sirene.rz.uni-duesseldorf.de
MX
  • 10 a2881.mx.srv.dfn.de
  • 10 b2881.mx.srv.dfn.de
  • 10 c2881.mx.srv.dfn.de
TXT
Show 4 TXT records
  • security_policy=https://www.hhu.de/it-sicherheit
  • adobe-idpfzim.-site-verification=18ec973e322894c7c0c11b75d7434eb7c4a5b8d2f164b30a6d47f928c7b5f811
  • security_contact=cert@hhu.de
  • Q181-R920-S212
Verified for
  • Cisco
  • Google
  • HARICA

Email authentication partial

SPF
v=spf1 ip4:134.99.18.0/24 ip4:134.99.128.0/24 ip4:134.99.108.0/27 ip4:134.99.108.128/27 include:spf.qb-feedback.com include:_spf.o288.mx.srv.dfn.de -all
strict (-all)
DMARC
v=DMARC1;p=none;sp=quarantine;pct=100;rua=mailto:dmarc-reports@uni-duesseldorf.de;ruf=mailto:dmarc-reports@uni-duesseldorf.de;aspf=r
policy: none (monitoring only) · sp=quarantine
DKIM
no key found at common selectors

Certificate (current)

GEANT TLS ECC 1
from 2026-01-21 to 2027-01-21
Expires in 245 days

Full certificate history on crt.sh ↗

Linked from (9)