SSL-Tools

SSL check results of public.dns.iij.jp

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Discover if the webservers of public.dns.iij.jp can be reached through a secure connection.

Summary

JSON Refresh

Report created Sun, 23 Aug 2026 08:21:23 +0000

The webservers of public.dns.iij.jp can be reached through a secure connection.

Servers

Hostname / IP address Certificates Protocol
public.dns.iij.jp
103.2.57.6
 *.dns.iij.jp
HSTS
missing
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
2 s
public.dns.iij.jp
103.2.57.5
 *.dns.iij.jp
HSTS
missing
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
public.dns.iij.jp
2001:300::6
 *.dns.iij.jp
HSTS
missing
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s
public.dns.iij.jp
2001:300::5
 *.dns.iij.jp
HSTS
missing
DANE
missing
PFS
supported
Heartbleed
not vulnerable
Weak ciphers
not found
  • TLSv1.2
  • SSLv3
1 s

Certificates

First seen at:

CN=*.dns.iij.jp

Certificate chain
  • *.dns.iij.jp
    • remaining
    • 256 bit
    • ecdsa-with-SHA384
      • YE1
        • remaining
        • 384 bit
        • ecdsa-with-SHA384
          • Root YE
            • remaining
            • 384 bit
            • ecdsa-with-SHA384
              • ISRG Root X2 (Certificate is self-signed.)
                • remaining
                • 384 bit
                • ecdsa-with-SHA384
Subject
Common Name (CN)
  • *.dns.iij.jp
Alternative Names
  • *.dns.iij.jp
Issuer
Country (C)
  • US
Organization (O)
  • Let's Encrypt
Common Name (CN)
  • YE1
validity period
Not valid before
2026-07-22
Not valid after
2026-10-20
This certifcate has been verified for the following usages:
  • Digital Signature
  • TLS Web Server Authentication
Fingerprints
SHA256
31:77:DE:D8:05:86:06:DA:EA:93:E2:6A:78:26:A7:2D:F0:14:78:04:38:55:59:8D:11:47:8C:F5:D1:91:E5:FE
SHA1
9B:4C:64:9A:0A:BF:73:76:D0:C5:49:8D:52:B7:42:0A:CC:1A:D4:32
X509v3 extensions
subjectKeyIdentifier
  • 2C:63:5F:98:A2:5F:18:E9:3E:D4:99:CD:08:B5:F0:09:90:E4:86:81
authorityKeyIdentifier
  • keyid:BB:20:CA:47:0B:FE:D7:E5:9C:F9:8F:09:2A:A3:8C:37:45:B1:BC:D8
authorityInfoAccess
  • CA Issuers - URI:http://ye1.i.lencr.org/
certificatePolicies
  • Policy: 2.23.140.1.2.1
crlDistributionPoints
  • Full Name:
  • URI:http://ye1.c.lencr.org/66.crl
ct_precert_scts
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65:
  • 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8
  • Timestamp : Jul 22 01:35:48.090 2026 GMT
  • Extensions: none
  • Signature : ecdsa-with-SHA256
  • 30:46:02:21:00:CF:3B:5F:81:2F:56:A1:BB:C7:10:F9:
  • 52:3B:C0:25:30:E6:67:96:AE:1C:FC:FB:04:2A:4B:F1:
  • B5:11:37:6D:A8:02:21:00:AB:55:1C:72:4D:F5:C1:5D:
  • FA:BF:5E:3F:33:1F:2F:29:F4:10:03:72:DA:8E:24:DC:
  • 62:96:AE:E3:53:96:24:FD
  • Signed Certificate Timestamp:
  • Version : v1 (0x0)
  • Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9:
  • 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A
  • Timestamp : Jul 22 01:35:48.362 2026 GMT
  • Extensions: 00:00:05:00:16:A8:80:02
  • Signature : ecdsa-with-SHA256
  • 30:45:02:20:58:03:96:7F:21:CC:80:A2:E5:48:8A:85:
  • 46:2C:62:FB:96:97:9A:A0:3C:70:53:15:2D:BA:62:1D:
  • B1:C4:6D:9E:02:21:00:EC:7C:ED:60:6D:11:C8:18:B2:
  • 48:99:DC:33:02:1A:D4:45:B6:5B:EE:96:A0:56:6D:9F:
  • 44:54:86:4E:A4:76:F4