SSL-Tools

SSL check results of cn.ard.de

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Discover if the mail servers for cn.ard.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 Thu, 24 Nov 2022 14:18:03 +0000

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

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

/mailservers/cn.ard.de

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mars03.ardstern.net
2a04:880:1:8016::10
 10
supported
mars03.ardstern.net
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
1 s
mars03.ardstern.net
91.195.79.13
 10
supported
mars03.ardstern.net
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
mars04.ardstern.net
2a04:880:1:8016::15
Results incomplete
20 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s
mars04.ardstern.net
91.195.79.23
Results incomplete
20 not checked
DANE
missing
PFS
not checked
Heartbleed
not checked
Weak ciphers
not checked
1 s

Outgoing Mails

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

Certificates

First seen at:

CN=mars03.ardstern.net,OU=PositiveSSL,OU=Domain Control Validated

Certificate chain
  • mars03.ardstern.net
    • remaining
    • 4096 bit
    • sha1WithRSAEncryption
    • Expired
      • PositiveSSL CA 2
        • remaining
        • 2048 bit
        • sha1WithRSAEncryption
        • Expired
        • Unknown Authority
          AddTrust External CA Root
Subject
Organizational Unit (OU)
  • Domain Control Validated
  • PositiveSSL
Common Name (CN)
  • mars03.ardstern.net
Alternative Names
  • mars03.ardstern.net
  • www.mars03.ardstern.net
Issuer
Country (C)
  • GB
State (ST)
  • Greater Manchester
Locality (L)
  • Salford
Organization (O)
  • COMODO CA Limited
Common Name (CN)
  • PositiveSSL CA 2
validity period
Not valid before
2013-06-12
Not valid after
2018-06-11
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
C5:FF:71:D4:9E:16:89:F4:17:EA:51:93:99:41:6F:DF:8A:C9:47:01:63:8A:35:2B:AE:C9:A1:FE:F4:64:A7:67
SHA1
F9:32:6F:68:05:D1:8C:03:39:E4:23:1A:C8:BB:4D:F5:47:E5:91:D1
X509v3 extensions
authorityKeyIdentifier
  • keyid:99:E4:40:5F:6B:14:5E:3E:05:D9:DD:D3:63:54:FC:62:B8:F7:00:AC
subjectKeyIdentifier
  • 05:BE:4E:FB:D0:30:47:A7:42:D1:D0:27:D8:E9:E6:B4:A0:31:33:67
certificatePolicies
  • Policy: 1.3.6.1.4.1.6449.1.2.2.7
  • CPS: http://www.positivessl.com/CPS
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://crl.comodoca.com/PositiveSSLCA2.crl
authorityInfoAccess
  • CA Issuers - URI:http://crt.comodoca.com/PositiveSSLCA2.crt
  • OCSP - URI:http://ocsp.comodoca.com