SSL check results of firstdev.ru

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Discover if the mail servers for firstdev.ru 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 Wed, 24 Feb 2021 09:41:03 +0000

The mailservers of firstdev.ru can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @firstdev.ru addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
ns1.firstdev.ru
91.240.87.248
10
supported
firstdev.ru
DANE
valid
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
4 s

Outgoing Mails

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

Certificates

First seen at:

CN=firstdev.ru

Certificate chain
  • firstdev.ru
    • remaining
    • 2048 bit
    • sha256WithRSAEncryption

      • R3
        • remaining
        • 2048 bit
        • sha256WithRSAEncryption

          • DST Root CA X3 (Certificate is self-signed.)
            • remaining
            • 2048 bit
            • sha1WithRSAEncryption

Subject
Common Name (CN)
  • firstdev.ru
Alternative Names
  • *.firstdev.ru
  • firstdev.ru
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • R3
validity period
Not valid before
2021-02-14
Not valid after
2021-05-15
This certifcate has been verified for the following usages:
  • Digital Signature
  • Key Encipherment
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
23:40:58:7F:16:13:B5:17:DB:A4:DD:E9:51:2A:A3:A6:6A:83:6F:E4:6C:32:89:C7:47:8F:AF:41:75:97:17:4A
SHA1
35:3E:33:8B:F9:3E:D4:5C:AF:7A:66:87:4C:80:00:23:B7:0B:6E:66
X509v3 extensions
subjectKeyIdentifier
  • D4:26:84:50:E6:6E:6C:DD:59:25:B9:0C:58:7D:5A:B8:DF:61:10:21
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
  • 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 : 94:20:BC:1E:8E:D5:8D:6C:88:73:1F:82:8B:22:2C:0D:
  • D1:DA:4D:5E:6C:4F:94:3D:61:DB:4E:2F:58:4D:A2:C2
  • Timestamp : Feb 14 12:18:51.077 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:16:5B:96:CD:C0:B8:F3:FF:C5:49:B5:E3:
  • 27:45:54:9A:7C:06:B5:62:1D:6F:B1:6E:46:E5:86:8A:
  • A8:61:FD:A3:02:20:2E:5A:86:C8:E7:7C:06:2A:3D:0B:
  • 85:55:D7:1A:FC:33:72:83:4E:70:A6:C7:A0:CE:72:74:
  • 26:B8:F9:03:E0:7B
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 7D:3E:F2:F8:8F:FF:88:55:68:24:C2:C0:CA:9E:52:89:
  • 79:2B:C5:0E:78:09:7F:2E:6A:97:68:99:7E:22:F0:D7
  • Timestamp : Feb 14 12:18:51.134 2021 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:CA:1C:6E:BC:35:0A:98:A2:8F:5E:B9:
  • 4F:CA:9E:B6:BB:43:34:7A:89:42:12:5F:3A:EB:C3:64:
  • 3A:C4:A5:3E:F1:02:20:42:29:95:D6:90:C5:41:98:C4:
  • F1:C0:34:F2:C9:A4:0C:57:08:55:9B:46:5A:5A:9A:59:
  • BD:7A:41:3E:40:90:F9

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.ns1.firstdev.ru
  • DANE-EE: Domain Issued Certificate
  • Use subject public key
  • SHA-256 Hash
valid
valid