SSL Checker
Submit the Hostname and Port in the fields below. This checker supports SNI and STARTTLS.
Report
It's all good. We have not detected any issues.
| Hostname: | done Matches Common Name or/and SAN |
| Expired: | done No (54 days till expiration) |
| Public Key: | done We were unable to find any issues in the public key of end-entity certificate |
| Trusted: | done Yes, we were able to verify the certificate |
| Self-Signed: | done No, the end-entity certificate is not self-signed |
| Chain Issues: | done No, we were unable to detect any issues in the certificate chain sent by the server |
| Weak signatures: | done No, certificates sent by the server were not signed utilizing a weak hash function |
| OCSP Status: | done OCSP Responder returned "good" status for the end-entity certificate |
DNS Information
| Resolves To: | 204.93.207.22 |
| Reverse IP lookup: | slb0.chi1.ntfo.org. |
| Nameserver: | dns2.udel.edu. |
| Nameserver: | dns1.udel.edu. |
| Nameserver: | anyns.pch.net. |
| Nameserver: | ns1.everett.org. |
General Information
| Common Name: | ntp.org |
| SANs: | DNS:ntp.org Total number of SANs: 1 |
| Signature Algorithm: | sha256WithRSAEncryption |
| Key Type: | RSA |
| Key size: | 2048 bits |
| Serial Number: | 389b2cc07d6ef6b736f8ac6f18d41071b2b |
| Not Before: | Mar 16, 2024 04:00:17 GMT |
| Not After: | Jun 14, 2024 04:00:16 GMT |
| Number of certs: | 2 |
| Revocation Status: | good |
| OCSP Stapling: | Not Supported |
| Server: | Apache |
| HSTS: | max-age-16000000; includeSubDomains; preload; |
| HPKP: | Not Supported |
Chain Information
Certificate # 1 - Common Name: ntp.org
Decode this certificate for verbose information → launch| Subject Common Name | ntp.org |
| Issuer Common Name | R3 |
| Issuer Organization | Let's Encrypt |
| Not Before: | Mar 16, 2024 04:00:17 GMT |
| Not After: | Jun 14, 2024 04:00:16 GMT |
| Signature Algorithm: | sha256WithRSAEncryption |
| Serial Number: | 389b2cc07d6ef6b736f8ac6f18d41071b2b |
| SHA1 Fingerprint: | 89:9F:63:08:59:5C:D0:BA:7A:8C:CA:F5:DD:91:00:A4:06:2A:15:8E |
| MD5 Fingerprint: | 35:09:45:2C:10:F4:12:42:97:AC:30:B8:97:80:01:4C |
Certificate # 2 - Common Name: R3
Decode this certificate for verbose information → launch| In place? | Yes, this certificate directly certifies the preceding one |
| Subject Common Name | R3 |
| Subject Organization | Let's Encrypt |
| Issuer Common Name | ISRG Root X1 |
| Issuer Organization | Internet Security Research Group |
| Not Before: | Sep 04, 2020 00:00:00 GMT |
| Not After: | Sep 15, 2025 16:00:00 GMT |
| Signature Algorithm: | sha256WithRSAEncryption |
| Serial Number: | 912b084acf0c18a753f6d62e25a75f5a |
| SHA1 Fingerprint: | A0:53:37:5B:FE:84:E8:B7:48:78:2C:7C:EE:15:82:7A:6A:F5:A4:05 |
| MD5 Fingerprint: | E8:29:E6:5D:7C:43:07:D6:FB:C1:3C:17:9E:03:7A:36 |
OpenSSL Handshake
depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1
verify return:1
depth=1 C = US, O = Let's Encrypt, CN = R3
verify return:1
depth=0 CN = ntp.org
verify return:1
CONNECTED(00000003)
OCSP response: no response sent
---
Certificate chain
0 s:CN = ntp.org
i:C = US, O = Let's Encrypt, CN = R3
-----BEGIN CERTIFICATE-----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FMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDovL3IzLm8ubGVu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==
-----END CERTIFICATE-----
1 s:C = US, O = Let's Encrypt, CN = R3
i:C = US, O = Internet Security Research Group, CN = ISRG Root X1
-----BEGIN CERTIFICATE-----
MIIFFjCCAv6gAwIBAgIRAJErCErPDBinU/bWLiWnX1owDQYJKoZIhvcNAQELBQAw
TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjAwOTA0MDAwMDAw
WhcNMjUwOTE1MTYwMDAwWjAyMQswCQYDVQQGEwJVUzEWMBQGA1UEChMNTGV0J3Mg
RW5jcnlwdDELMAkGA1UEAxMCUjMwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEK
AoIBAQC7AhUozPaglNMPEuyNVZLD+ILxmaZ6QoinXSaqtSu5xUyxr45r+XXIo9cP
R5QUVTVXjJ6oojkZ9YI8QqlObvU7wy7bjcCwXPNZOOftz2nwWgsbvsCUJCWH+jdx
sxPnHKzhm+/b5DtFUkWWqcFTzjTIUu61ru2P3mBw4qVUq7ZtDpelQDRrK9O8Zutm
NHz6a4uPVymZ+DAXXbpyb/uBxa3Shlg9F8fnCbvxK/eG3MHacV3URuPMrSXBiLxg
Z3Vms/EY96Jc5lP/Ooi2R6X/ExjqmAl3P51T+c8B5fWmcBcUr2Ok/5mzk53cU6cG
/kiFHaFpriV1uxPMUgP17VGhi9sVAgMBAAGjggEIMIIBBDAOBgNVHQ8BAf8EBAMC
AYYwHQYDVR0lBBYwFAYIKwYBBQUHAwIGCCsGAQUFBwMBMBIGA1UdEwEB/wQIMAYB
Af8CAQAwHQYDVR0OBBYEFBQusxe3WFbLrlAJQOYfr52LFMLGMB8GA1UdIwQYMBaA
FHm0WeZ7tuXkAXOACIjIGlj26ZtuMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcw
AoYWaHR0cDovL3gxLmkubGVuY3Iub3JnLzAnBgNVHR8EIDAeMBygGqAYhhZodHRw
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avAuvDszue5L3sz85K+EC4Y/wFVDNvZo4TYXao6Z0f+lQKc0t8DQYzk1OXVu8rp2
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hCExroL1+7mryIkXPeFM5TgO9r0rvZaBFOvV2z0gp35Z0+L4WPlbuEjN/lxPFin+
HlUjr8gRsI3qfJOQFy/9rKIJR0Y/8Omwt/8oTWgy1mdeHmmjk7j1nYsvC9JSQ6Zv
MldlTTKB3zhThV1+XWYp6rjd5JW1zbVWEkLNxE7GJThEUG3szgBVGP7pSWTUTsqX
nLRbwHOoq7hHwg==
-----END CERTIFICATE-----
---
Server certificate
subject=CN = ntp.org
issuer=C = US, O = Let's Encrypt, CN = R3
---
No client certificate CA names sent
Peer signing digest: SHA512
Peer signature type: RSA
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 3070 bytes and written 444 bytes
Verification: OK
---
New, TLSv1.2, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 2048 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES256-GCM-SHA384
Session-ID: 5A622A3B8274C47DE58B122289FD9AF6F441B76DEE4C73D366BFC614C1198276
Session-ID-ctx:
Master-Key: 11C1255C4179D4D8019F14DE24194D863272C68454D49C4F94D8B70EA2FA5C8EA75574E9747B3735431BB3FA89CE3DCC
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1713595726
Timeout : 7200 (sec)
Verify return code: 0 (ok)
Extended master secret: yes
---
DONE