SSL-Tools

SSL check results of bioster.cz

NEW You can also bulk check multiple servers.

Discover if the mail servers for bioster.cz 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 Mon, 20 Nov 2023 10:55:20 +0000

The mailservers of bioster.cz can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @bioster.cz addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.bioster.cz
46.13.6.234
 0
supported
mail.bioster.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.bioster.cz

Certificate chain
  • mail.bioster.cz
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption
      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.bioster.cz
Alternative Names
  • autodiscover.bioster.cz
  • mail.bioster.cz
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2023-10-23
Not valid after
2024-01-21
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
C1:A5:E5:38:3B:61:89:62:E6:AE:8E:49:73:AB:44:9F:0F:5D:6F:F8:46:7A:C0:C9:00:F6:69:65:D5:BB:9C:EB
SHA1
CE:5B:EC:B3:3A:E5:45:29:2C:34:9E:97:6E:F0:51:D1:AB:B1:32:CF
X509v3 extensions
subjectKeyIdentifier
  • D4:60:3F:BD:40:7B:73:AD:76:F7:8D:9C:C4:A0:58:CA:BD:64:65:94
authorityKeyIdentifier
  • keyid:14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
  • OCSP - URI:http://r3.o.lencr.org
  • CA Issuers - URI:http://r3.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 3B:53:77:75:3E:2D:B9:80:4E:8B:30:5B:06:FE:40:3B:
  • 67:D8:4F:C3:F4:C7:BD:00:0D:2D:72:6F:E1:FA:D4:17
  • Timestamp : Oct 23 02:36:52.436 2023 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:96:6A:63:C9:19:6B:8F:DF:8E:16:FF:
  • 6A:C8:24:46:B4:94:BB:96:5F:9E:F3:BF:9C:D2:3A:4E:
  • B7:FA:0E:42:E1:02:21:00:DD:7A:1A:71:C1:59:FF:83:
  • AC:71:F7:2E:1F:F2:A2:FA:B9:17:B7:09:CA:91:0B:DA:
  • 86:92:D0:56:EE:70:84:EA
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : EE:CD:D0:64:D5:DB:1A:CE:C5:5C:B7:9D:B4:CD:13:A2:
  • 32:87:46:7C:BC:EC:DE:C3:51:48:59:46:71:1F:B5:9B
  • Timestamp : Oct 23 02:36:52.475 2023 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:89:95:28:95:80:49:4B:25:39:FC:BB:
  • 84:B0:64:A9:B8:F5:40:87:CD:0F:9D:17:9F:B6:27:DC:
  • 14:5A:91:B3:15:02:21:00:80:D2:A8:D7:85:19:EE:E8:
  • F2:2D:A2:4D:17:6B:A7:7F:BC:59:2E:2E:E1:66:4F:DF:
  • 1A:7A:71:CB:0D:12:24:B2