SSL-Tools

SSL check results of htnet.de

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Discover if the mail servers for htnet.de can be reached through a secure connection.

To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.

Summary

JSON Refresh

Report created Wed, 13 Oct 2021 14:48:27 +0000

We can not guarantee a secure connection to the mailservers of htnet.de!

Please contact the operator of htnet.de and ask him or her to solve this problem. This result stays accessible under the following address:

/mailservers/htnet.de

Servers

Incoming Mails

These servers are responsible for incoming mails to @htnet.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mailserver.htnet.de
213.23.253.114
 21
supported
mailserver.htnet.de
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
23 s
spamfalle.htnet.de
213.23.253.115
Results incomplete
100 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
11 s

Outgoing Mails

We have not received any emails from a @htnet.de address so far. Test mail delivery

Certificates

First seen at:

CN=mailserver.htnet.de,OU=IT-Security,O=Hoehle\+Tettinger GbR,L=42279 Wuppertal,ST=NRW,C=DE

Certificate chain
  • mailserver.htnet.de (Certificate is self-signed.)
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
    • Unknown Authority
Subject
Country (C)
  • DE
State (ST)
  • NRW
Locality (L)
  • 42279 Wuppertal
Organization (O)
  • Hoehle+Tettinger GbR
Organizational Unit (OU)
  • IT-Security
Common Name (CN)
  • mailserver.htnet.de
Issuer

Certificate is self-signed.

validity period
Not valid before
2021-05-06
Not valid after
2022-05-06
Fingerprints
SHA256
44:6B:C3:50:01:C6:08:53:4F:F8:C6:D7:24:9A:73:5E:C7:15:59:A8:6F:97:FA:30:39:43:46:F5:74:2B:61:DD
SHA1
23:35:C8:3A:6A:47:50:78:1F:EF:C7:90:1A:56:1D:28:F3:24:1C:15
X509v3 extensions
subjectKeyIdentifier
  • C8:1B:1E:36:A7:5A:21:7C:2E:7A:A7:5F:9F:17:66:A0:79:BD:24:89
authorityKeyIdentifier
  • keyid:C8:1B:1E:36:A7:5A:21:7C:2E:7A:A7:5F:9F:17:66:A0:79:BD:24:89
  • DirName:/C=DE/ST=NRW/L=42279 Wuppertal/O=Hoehle+Tettinger GbR/OU=IT-Security/CN=mailserver.htnet.de
  • serial:E4:08:EE:3D:38:3F:7F:71