SSL check results of barkowski.info

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Discover if the mail servers for barkowski.info 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

Report created Mon, 16 Dec 2019 09:58:02 +0000

The mailservers of barkowski.info 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 @barkowski.info addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
mail.barkowski.info
5.9.97.238
10
supported
mail.barkowski.info
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
8 s
altmail.barkowski.info
5.9.97.241
200
supported
disk.dc.barkowski.info
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
supported
  • ECDHE_RSA_WITH_RC4_128_SHA
  • SSL_RSA_WITH_RC4_128_SHA
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
12 s

Outgoing Mails

We have received emails from these servers with @barkowski.info sender addresses. Test mail delivery

Host TLS Version & Cipher
mail.barkowski.info (5.104.107.195)
TLSv1.2 DHE-RSA-AES256-GCM-SHA384

Certificates

First seen at:

CN=mail.barkowski.info

Certificate chain
Subject
Common Name (CN)
  • mail.barkowski.info
Alternative Names
  • imap.barkowski.info
  • mail.barkowski.info
  • smtp.barkowski.info
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2019-12-10
Not valid after
2020-03-09
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
07:5D:35:BB:E7:16:8A:D3:21:B0:53:E2:92:B6:03:77:C7:73:DE:32:68:08:5D:48:E2:B3:DA:29:A5:C3:81:2E
SHA1
F8:C2:1A:42:1C:B0:9B:39:E1:6C:92:DA:66:45:E1:D9:A0:7E:21:A8
X509v3 extensions
subjectKeyIdentifier
  • 2A:14:F3:8C:1A:74:07:36:19:EF:BF:7D:2E:85:BD:83:C3:F4:CE:F6
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 5E:A7:73:F9:DF:56:C0:E7:B5:36:48:7D:D0:49:E0:32:
  • 7A:91:9A:0C:84:A1:12:12:84:18:75:96:81:71:45:58
  • Timestamp : Dec 10 02:17:26.450 2019 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:60:15:54:FE:8C:D3:FD:09:3E:F3:B5:93:
  • 6F:5B:7F:9D:91:8A:1C:BE:1B:6E:C1:4D:E3:18:FB:00:
  • 85:FF:23:6D:02:20:62:1F:26:F7:EF:F8:B6:45:A4:86:
  • FB:26:A9:25:77:B0:6A:1E:4D:F0:2A:B4:73:7E:1E:30:
  • 69:0E:6E:0E:C9:EA
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : B2:1E:05:CC:8B:A2:CD:8A:20:4E:87:66:F9:2B:B9:8A:
  • 25:20:67:6B:DA:FA:70:E7:B2:49:53:2D:EF:8B:90:5E
  • Timestamp : Dec 10 02:17:26.476 2019 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:D8:D2:E1:C5:24:31:8C:69:BE:91:4D:
  • 7F:42:13:0C:BE:9B:E5:DC:54:4C:31:46:AB:79:E6:BA:
  • 2B:28:8A:A4:72:02:20:6D:4B:00:2C:C7:C9:9C:4F:D7:
  • 83:50:F0:83:8B:83:19:FC:39:36:51:0A:78:45:3F:02:
  • 39:DD:DC:A8:EE:B0:EF
First seen at:

CN=disk.dc.barkowski.info

Certificate chain
Subject
Common Name (CN)
  • disk.dc.barkowski.info
Alternative Names
  • altmail.barkowski.info
  • disk.dc.barkowski.info
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • Let's Encrypt Authority X3
validity period
Not valid before
2019-12-16
Not valid after
2020-03-15
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
C4:E8:54:2D:73:08:5A:4B:4E:88:2E:35:62:4B:3A:F1:4B:14:3C:60:B5:27:F1:A7:4C:DA:86:79:9A:3A:9C:92
SHA1
EC:2E:BC:C6:B5:4F:07:2B:79:9B:23:64:36:64:62:89:CD:20:5C:39
X509v3 extensions
subjectKeyIdentifier
  • 80:16:DB:27:A4:43:5B:65:A8:D0:BF:55:79:61:C3:13:AA:D7:CE:AA
authorityKeyIdentifier
  • keyid:A8:4A:6A:63:04:7D:DD:BA:E6:D1:39:B7:A6:45:65:EF:F3:A8:EC:A1
authorityInfoAccess
  • OCSP - URI:http://ocsp.int-x3.letsencrypt.org
  • CA Issuers - URI:http://cert.int-x3.letsencrypt.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
  • Policy: 1.3.6.1.4.1.44947.1.1.1
  • CPS: http://cps.letsencrypt.org
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 5E:A7:73:F9:DF:56:C0:E7:B5:36:48:7D:D0:49:E0:32:
  • 7A:91:9A:0C:84:A1:12:12:84:18:75:96:81:71:45:58
  • Timestamp : Dec 16 09:55:37.952 2019 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:9D:6F:52:68:D1:86:B2:5C:EA:46:96:
  • 05:2E:F6:1D:D5:A9:BE:15:DA:91:BB:A2:AC:9E:5F:DB:
  • 51:66:41:5A:9D:02:20:34:CD:2A:A6:8D:56:76:51:A5:
  • 2D:2A:1D:5D:2D:3E:20:74:A8:79:86:7F:03:82:51:E9:
  • C5:3B:41:28:B3:FA:75
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 07:B7:5C:1B:E5:7D:68:FF:F1:B0:C6:1D:23:15:C7:BA:
  • E6:57:7C:57:94:B7:6A:EE:BC:61:3A:1A:69:D3:A2:1C
  • Timestamp : Dec 16 09:55:38.100 2019 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:47:8F:A2:E6:86:00:03:FD:87:47:4E:1E:
  • AE:47:8D:82:50:19:15:0A:A7:E0:55:56:CD:3F:40:06:
  • 89:50:C5:21:02:20:3F:A7:4C:71:41:5B:DF:5E:FC:1C:
  • 04:76:3D:17:87:BB:D3:93:D2:DE:18:DF:4E:C8:D5:09:
  • 96:F7:80:3F:58:CF