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THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLS

cnr.it · 150.146.205.11:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A00018A:SSL routines::dh key too small

Certificate verification failed

Subject
C=IT L=Roma O=Consiglio Nazionale delle Ricerche CN=www.cnr.it
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Valid from
2025-11-21T12:06:51+00:00
Expires
2026-11-21T12:06:51+00:00
Days remaining
59
Serial (hex)
12EAAFF503EBEE0BFB772569EC83527F
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

DNS:www.cnr.it, DNS:cnr.it

SHA-256 fingerprint

03:1F:F1:C3:EC:A1:99:A4:A3:F2:08:71:1B:6C:E5:53:56:57:B9:75:62:47:74:A8:8C:C8:31:4F:85:6C:1B:D4
Certificate extensions & PEM
authorityKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-GEANT-TLS-R1.cer OCSP - URI:http://ocsp-tls.harica.gr
subjectAltName
DNS:www.cnr.it, DNS:cnr.it
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 0.4.0.2042.1.7 Policy: 1.3.6.1.4.1.26513.1.1.1.2
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-GEANT-TLS-R1.crl
subjectKeyIdentifier
57:6D:4F:43:D2:38:BF:B3:B0:CD:05:D2:29:62:AA:B3:95:A2:A5:D5
keyUsage
Digital Signature, Key Encipherment
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 : Nov 21 12:16:52.963 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:7B:6F:3C:0D:37:9E:55:55:59:7F:9B:1D: 8C:F8:50:6B:21:AA:95:60:8D:51:0F:16:75:2D:04:53: 2C:25:81:28:02:20:2D:BB:BC:29:B2:9A:23:2C:80:41: CD:46:76:72:C2:0A:93:2E:6E:62:29:B7:46:98:0D:F5: 4D:55:83:68:55:B9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Nov 21 12:16:52.911 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:F7:F9:01:13:FE:E5:F6:49:C4:3C:32: 64:D2:E9:97:B0:5D:D9:F2:63:79:11:9B:A5:84:B2:D7: 68:98:93:1A:CD:02:21:00:F1:67:28:64:24:DC:5A:C9: 66:99:C6:01:CF:7B:1A:6A:73:E5:4E:51:49:71:45:8E: 58:53:DE:6E:E7:91:D9:B3 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Nov 21 12:16:52.964 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:3C:19:80:4F:9A:49:39:12:BC:10:B3:78: EF:01:B0:9D:61:F7:33:35:E3:C8:66:3E:29:18:E3:7B: 30:98:AC:8C:02:20:28:A3:39:9A:D3:02:C6:7B:4A:48: 7A:EE:0D:8B:28:E3:B8:1E:77:28:68:D0:4A:33:DB:31: 75:97:5E:82:A1:BA
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: Unavailable · Checked 2026-09-22T12:50:42+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS RSA Root CA 2021
Valid from
2025-01-03T11:15:00+00:00
Expires
2039-12-31T11:14:59+00:00
Days remaining
4847
Serial (hex)
14D57BF3692228219A5567FA91651B22
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

5B:67:8D:C4:40:95:A5:28:95:B6:3B:31:F2:72:27:F4:B3:6C:3E:34:74:91:BF:2B:FA:69:18:37:A5:FB:8C:79
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
authorityKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-TLS-Root-2021-RSA.cer
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-TLS-Root-2021-RSA.crl
subjectKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS RSA Root CA 2021
Issuer
C=GR L=Athens O=Hellenic Academic and Research Institutions Cert. Authority CN=Hellenic Academic and Research Institutions RootCA 2015
Valid from
2021-09-02T07:41:55+00:00
Expires
2029-08-31T07:41:54+00:00
Days remaining
1073
Serial (hex)
2A6086D4D4DE45C95E4B98FBBF2FBF26
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4A:CD:8D:C6:02:0A:54:5A:85:89:43:A5:53:B5:E0:F3:FC:5B:85:9A:EA:17:46:65:0D:69:CF:12:10:F9:56:D8
Certificate extensions & PEM
basicConstraints
CA:TRUE
authorityKeyIdentifier
71:15:67:C8:C8:C9:BD:75:5D:72:D0:38:18:6A:9D:F3:71:24:54:0B
authorityInfoAccess
CA Issuers - URI:http://repo.harica.gr/certs/HaricaRootCA2015.crt
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HaricaRootCA2015.crl
subjectKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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