SSL-Tools

SSL check results of dte-systems.de

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Discover if the mail servers for dte-systems.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

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Report created Sat, 05 Dec 2020 01:10:58 +0000

The mailservers of dte-systems.de can be reached through an encrypted connection.

However, we found problems that may affect the security.

Servers

Incoming Mails

These servers are responsible for incoming mails to @dte-systems.de addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.dte-systems.de
87.138.200.28
 10
supported
SonicWALL
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
3 s
mail2.dte-systems.de
93.240.59.211
 20
supported
SonicWALL
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
3 s

Outgoing Mails

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

Certificates

First seen at:

CN=SonicWALL,OU=SonicWALL,O=SonicWALL,L=SonicWALL,ST=SonicWALL,C=US

Certificate chain
  • SonicWALL (Certificate is self-signed.)
    • remaining
    • 2048 bit
    • sha1WithRSAEncryption
    • Hostname Mismatch
    • Unknown Authority
Subject
Country (C)
  • US
State (ST)
  • SonicWALL
Locality (L)
  • SonicWALL
Organization (O)
  • SonicWALL
Organizational Unit (OU)
  • SonicWALL
Common Name (CN)
  • SonicWALL
Issuer

Certificate is self-signed.

validity period
Not valid before
2014-10-07
Not valid after
2024-10-07
Fingerprints
SHA256
BD:38:B0:3A:E2:AC:4C:E8:D9:7F:CA:76:BA:4C:7A:7D:35:A0:14:DF:D6:F2:7F:C3:C1:CE:B4:83:AA:D7:71:8B
SHA1
15:EA:44:6F:60:CF:CA:10:E3:C2:38:0B:56:2E:80:97:D6:6A:06:4B
X509v3 extensions
subjectKeyIdentifier
  • 12:73:94:CB:2F:92:89:91:36:E6:B1:9A:85:9F:4F:89:A4:D4:36:AB
authorityKeyIdentifier
  • keyid:12:73:94:CB:2F:92:89:91:36:E6:B1:9A:85:9F:4F:89:A4:D4:36:AB
  • DirName:/C=US/ST=SonicWALL/L=SonicWALL/O=SonicWALL/OU=SonicWALL/CN=SonicWALL
  • serial:9B:4B:94:FE:FA:C0:50:15