SSL-Tools

SSL check results of zvvz.cz

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Discover if the mail servers for zvvz.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 Fri, 06 Dec 2024 01:30:50 +0000

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

Servers

Incoming Mails

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

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.zvvz.cz
212.158.149.8
 10
supported
*.zvvz.cz
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
7 s
mail.milnet.cz
2a07:1f41:4::18
 30
supported
mail.milnet.cz
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
8 s
mail.milnet.cz
85.163.68.137
 30
supported
mail.milnet.cz
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • SSLv3
7 s

Outgoing Mails

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

Certificates

First seen at:

CN=mail.milnet.cz

Certificate chain
  • mail.milnet.cz
    • remaining
    • 4096 bit
    • sha256WithRSAEncryption
      • R11
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • mail.milnet.cz
Alternative Names
  • mail.milnet.cz
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R11
validity period
Not valid before
2024-10-03
Not valid after
2025-01-01
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
BB:96:B4:F5:F4:2E:65:F9:57:20:E3:5A:D3:22:11:83:6F:9B:51:DF:B7:91:60:59:E0:3C:14:97:D5:0A:C6:F2
SHA1
DB:05:66:E4:F4:75:3E:AE:13:4F:0F:F0:59:31:E8:31:B9:1E:35:25
X509v3 extensions
subjectKeyIdentifier
  • 61:9A:A6:E8:E9:1D:07:7F:73:03:2E:5F:3A:2E:98:32:F0:7A:68:89
authorityKeyIdentifier
  • keyid:C5:CF:46:A4:EA:F4:C3:C0:7A:6C:95:C4:2D:B0:5E:92:2F:26:E3:B9
authorityInfoAccess
  • OCSP - URI:http://r11.o.lencr.org
  • CA Issuers - URI:http://r11.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : A2:E3:0A:E4:45:EF:BD:AD:9B:7E:38:ED:47:67:77:53:
  • D7:82:5B:84:94:D7:2B:5E:1B:2C:C4:B9:50:A4:47:E7
  • Timestamp : Oct 3 10:38:48.853 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:C5:59:35:E3:5C:29:B9:65:0B:A0:54:
  • CF:E3:1E:DC:0F:71:BF:E6:0D:19:81:17:2D:DD:42:EF:
  • 34:42:73:59:04:02:20:12:79:5A:A4:CC:35:48:24:0D:
  • 9A:B4:27:56:3B:21:89:B1:47:DB:33:1C:F8:3B:08:BB:
  • C1:4E:CF:BF:53:C9:4C
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : E0:92:B3:FC:0C:1D:C8:E7:68:36:1F:DE:61:B9:96:4D:
  • 0A:52:78:19:8A:72:D6:72:C4:B0:4D:A5:6D:6F:54:04
  • Timestamp : Oct 3 10:38:48.861 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:74:D8:1E:36:16:09:9D:79:EC:AD:39:F4:
  • ED:69:4A:EE:B1:6F:D0:9F:20:5C:36:9A:1D:CA:A0:2E:
  • 58:70:D5:69:02:21:00:9A:78:C0:3E:71:AE:71:7E:6C:
  • 23:EE:75:A0:70:36:E3:64:40:CE:BA:6C:B0:35:73:F3:
  • 0E:87:5C:AE:15:AB:D2
First seen at:

CN=*.zvvz.cz

Certificate chain
Subject
Common Name (CN)
  • *.zvvz.cz
Alternative Names
  • *.zvvz.cz
  • zvvz.cz
Issuer
Country (C)
  • US
Organization (O)
  • DigiCert Inc
Organizational Unit (OU)
  • www.digicert.com
Common Name (CN)
  • GeoTrust TLS RSA CA G1
validity period
Not valid before
2024-04-12
Not valid after
2025-04-13
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
87:5B:6E:16:73:00:79:03:64:A2:B9:A9:0C:AF:B1:41:E4:9E:E0:6F:16:F6:34:DF:21:4F:8F:91:A9:C5:F8:B0
SHA1
4A:2E:B9:9F:5E:47:4E:60:B3:49:B7:68:F9:3E:60:B7:E8:51:CF:34
X509v3 extensions
authorityKeyIdentifier
  • keyid:94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
subjectKeyIdentifier
  • 7D:FE:84:A4:B4:3F:45:F9:F9:C5:D3:9E:0D:06:05:EA:02:3D:DD:BB
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • CPS: http://www.digicert.com/CPS
crlDistributionPoints
  • Full Name:
  • URI:http://cdp.geotrust.com/GeoTrustTLSRSACAG1.crl
authorityInfoAccess
  • OCSP - URI:http://status.geotrust.com
  • CA Issuers - URI:http://cacerts.geotrust.com/GeoTrustTLSRSACAG1.crt
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 4E:75:A3:27:5C:9A:10:C3:38:5B:6C:D4:DF:3F:52:EB:
  • 1D:F0:E0:8E:1B:8D:69:C0:B1:FA:64:B1:62:9A:39:DF
  • Timestamp : Apr 12 11:22:56.464 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:36:55:AE:71:B0:43:72:1D:BC:F3:88:3A:
  • 2F:CF:11:6A:FF:3F:ED:D1:F1:68:01:31:BA:B9:36:21:
  • 01:D7:F2:F6:02:20:6A:3B:AE:DF:28:AE:8B:40:35:F2:
  • 3E:12:76:EC:66:68:42:7B:92:08:29:C0:05:21:F4:CD:
  • A9:90:E1:AF:CE:BE
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 7D:59:1E:12:E1:78:2A:7B:1C:61:67:7C:5E:FD:F8:D0:
  • 87:5C:14:A0:4E:95:9E:B9:03:2F:D9:0E:8C:2E:79:B8
  • Timestamp : Apr 12 11:22:56.455 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:53:99:FA:53:D5:BF:42:05:5F:3D:C3:7B:
  • 34:9B:6D:F9:86:2D:0E:36:6E:73:87:11:98:B3:E1:78:
  • B0:69:8B:67:02:20:10:BD:6B:12:C9:37:C7:3A:41:72:
  • 2A:F3:D1:B1:80:5B:A4:94:CB:E4:AE:C2:64:82:9F:E3:
  • DD:26:71:72:22:9E
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : E6:D2:31:63:40:77:8C:C1:10:41:06:D7:71:B9:CE:C1:
  • D2:40:F6:96:84:86:FB:BA:87:32:1D:FD:1E:37:8E:50
  • Timestamp : Apr 12 11:22:56.471 2024 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:41:DD:DC:07:1B:13:37:FA:6E:15:81:EA:
  • 8C:6D:14:40:98:6E:4C:DA:E7:92:19:52:D2:34:B7:52:
  • 39:09:B1:95:02:20:31:E0:55:D0:6E:22:17:68:07:D5:
  • FA:D0:B7:94:19:52:BA:28:B8:54:6D:4D:2C:F6:21:56:
  • 0D:99:CF:84:9D:BC

DANE

DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.

Name Options DNSSEC Matches
_25._tcp.mail.milnet.cz
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
valid