SSL-Tools

SSL check results of firefly.gnunet.org

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Discover if the mail servers for firefly.gnunet.org 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 Sun, 29 Jun 2025 00:30:20 +0000

The mailservers of firefly.gnunet.org can be reached through a secure connection.

Servers

Incoming Mails

These servers are responsible for incoming mails to @firefly.gnunet.org addresses.

Hostname / IP address Priority STARTTLS Certificates Protocol
firefly.gnunet.org
193.5.87.219
 -
supported
gnunet.org
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
firefly.gnunet.org
193.5.87.218
 -
supported
gnunet.org
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
firefly.gnunet.org
2001:620:500:464::218
 -
supported
gnunet.org
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • TLSv1.1
  • TLSv1.0
  • SSLv3
2 s
firefly.gnunet.org
2001:620:500:464::219
 -
supported
gnunet.org
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 @firefly.gnunet.org address so far. Test mail delivery

Certificates

First seen at:

CN=gnunet.org

Certificate chain
  • gnunet.org
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • E6
        • remaining
        • 384 bit
        • sha256WithRSAEncryption
          • ISRG Root X1 (Certificate is self-signed.)
            • remaining
            • 4096 bit
            • sha256WithRSAEncryption
Subject
Common Name (CN)
  • gnunet.org
Alternative Names
  • firefly.gnunet.org
  • gnunet.org
  • mta-sts.taler.net
  • taler.net
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • E6
validity period
Not valid before
2025-06-25
Not valid after
2025-09-23
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
  • TLS Web Client Authentication
Fingerprints
SHA256
F2:48:16:6A:EB:51:D1:27:63:98:0F:F6:F5:92:CD:F9:19:A0:B3:3F:1C:54:78:D5:1D:9F:CA:2E:70:C5:15:06
SHA1
00:11:B7:AF:18:15:51:BC:41:1C:7A:A8:8B:61:6E:AB:77:F3:2F:B0
X509v3 extensions
subjectKeyIdentifier
  • 00:FB:4A:D4:8B:8B:B6:90:4D:33:B4:FC:A4:70:35:1B:08:34:19:AD
authorityKeyIdentifier
  • keyid:93:27:46:98:03:A9:51:68:8E:98:D6:C4:42:48:DB:23:BF:58:94:D2
authorityInfoAccess
  • CA Issuers - URI:http://e6.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://e6.c.lencr.org/52.crl
ct_precert_scts
  • 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 : Jun 25 21:20:31.197 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:45:02:21:00:B7:3B:20:F9:45:76:D4:73:C7:FD:BE:
  • 9A:B4:82:A4:83:4C:84:79:EF:4F:AE:CB:05:8B:9C:26:
  • 80:39:7D:40:0C:02:20:1B:AC:5A:FC:80:1B:22:43:F0:
  • C0:E8:B3:26:29:D7:E8:9B:5C:5A:44:F7:7E:D9:61:87:
  • 3C:41:EA:3C:DA:57:06
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 1A:04:FF:49:D0:54:1D:40:AF:F6:A0:C3:BF:F1:D8:C4:
  • 67:2F:4E:EC:EE:23:40:68:98:6B:17:40:2E:DC:89:7D
  • Timestamp : Jun 25 21:20:31.082 2025 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:44:02:20:20:73:38:24:4C:AD:62:A3:18:08:33:6C:
  • 19:EF:5E:70:BB:DC:A2:44:A2:7D:1A:28:A8:B1:28:3D:
  • ED:E8:7B:17:02:20:06:4E:FC:76:F6:51:9A:FF:5C:2C:
  • 1C:A9:2F:79:C2:2F:39:05:FC:B2:06:B7:B6:D6:CF:C7:
  • 79:4F:7E:23:36:FF