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 (83 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: | 54.217.253.146 |
| Reverse IP lookup: | ec2-54-217-253-146.eu-west-1.compute.amazonaws.com. |
| Nameserver: | dns00.dns.t-ipnet.de. |
| Nameserver: | dns50.dns.t-ipnet.de. |
| Nameserver: | pns.dtag.de. |
| Nameserver: | dns20.dns.t-ipnet.de. |
| Nameserver: | dns02.dns.t-ipnet.de. |
General Information
| Common Name: | t-online.de |
| SANs: | DNS:augenblicke.t-online.deDNS:auto.t-online.deDNS:autobewertung.t-online.deDNS:bilder.t-online.deDNS:blog.t-online.deDNS:boersenradar.t-online.deDNS:bundesliga.t-online.deDNS:business-online.t-online.deDNS:computer-electronics.t-online.deDNS:computer-insider.t-online.deDNS:computer.t-online.deDNS:derivate.t-online.deDNS:digital.t-online.deDNS:dsl-und-dienste.t-online.deDNS:eltern.t-online.deDNS:em.t-online.deDNS:email-logout-abgeschlossen.t-online.deDNS:emaildienste.t-online.deDNS:finanzen.t-online.deDNS:fussball.t-online.deDNS:gaspreise.t-online.deDNS:gold.t-online.deDNS:handy.t-online.deDNS:home.t-online.deDNS:internetpraesenz.t-online.deDNS:jobsuche.t-online.deDNS:karrierewissen.t-online.deDNS:kids.t-online.deDNS:lifestyle.t-online.deDNS:login.t-online.deDNS:lottoservice.t-online.deDNS:nachrichten.t-online.deDNS:olympia.t-online.deDNS:oncomputer.t-online.deDNS:onnachrichten.t-online.deDNS:onsport.t-online.deDNS:onunterhaltung.t-online.deDNS:partnerfragmente2013.t-online.deDNS:perlfrech.deDNS:reise.t-online.deDNS:reisen.t-online.deDNS:service.t-online.deDNS:shopping-portal.t-online.deDNS:spiele.t-online.deDNS:sport.t-online.deDNS:surfen-und-telefonieren.t-online.deDNS:t-games.t-online.deDNS:t-online-business.deDNS:t-online-travel.deDNS:t-online.deDNS:themen.t-online.deDNS:top-themen.t-online.deDNS:tourenplaner.t-online.deDNS:unterhaltung.t-online.deDNS:wahlzeit.deDNS:wetter.t-online.deDNS:wirtschaft.t-online.deDNS:wlan.t-online.deDNS:ww.t-online.deDNS:www.dsl-und-dienste.t-online.deDNS:www.gold.t-online.deDNS:www.handy.t-online.deDNS:www.heute.t-online.deDNS:www.home.t-online.deDNS:www.surfen-und-telefonieren.t-online.deDNS:www.t-online-business.deDNS:www.t-online-travel.deDNS:www.themen.t-online.deDNS:www.wahlzeit.de Total number of SANs: 69 |
| Signature Algorithm: | sha256WithRSAEncryption |
| Key Type: | ECDSA (secp256r1) |
| Key size: | 256 bits |
| Serial Number: | 3ba173b63871e7cf77ce29255fa193b3467 |
| Not Before: | Apr 19, 2024 02:03:27 GMT |
| Not After: | Jul 18, 2024 02:03:26 GMT |
| Number of certs: | 2 |
| Revocation Status: | good |
| OCSP Stapling: | Not Supported |
| Server: | Not Provided |
| HSTS: | Not Supported |
| HPKP: | Not Supported |
Chain Information
Certificate # 1 - Common Name: t-online.de
Decode this certificate for verbose information → launch| Subject Common Name | t-online.de |
| Issuer Common Name | R3 |
| Issuer Organization | Let's Encrypt |
| Not Before: | Apr 19, 2024 02:03:27 GMT |
| Not After: | Jul 18, 2024 02:03:26 GMT |
| Signature Algorithm: | sha256WithRSAEncryption |
| Serial Number: | 3ba173b63871e7cf77ce29255fa193b3467 |
| SHA1 Fingerprint: | 1C:EE:E4:26:9E:F1:02:C0:83:9E:60:4E:E1:05:49:C3:0F:19:6D:9F |
| MD5 Fingerprint: | A6:2D:86:29:03:ED:EC:07:2E:2A:C0:F6:3D:7F:DD:F0 |
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 = t-online.de verify return:1 CONNECTED(00000003) OCSP response: no response sent --- Certificate chain 0 s:CN = t-online.de i:C = US, O = Let's Encrypt, CN = R3 -----BEGIN CERTIFICATE----- MIIKXjCCCUagAwIBAgISA7oXO2OHHnz3fOKSVfoZOzRnMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDA0MTkwMjAzMjdaFw0yNDA3MTgwMjAzMjZaMBYxFDASBgNVBAMT C3Qtb25saW5lLmRlMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEO/hbeXrDaD9K UUg1ad6ewd2ms3AHy6t2IzaPKMMepTWuPyZuzVWzcPb3CkQ5ZWx4yeCf5vV/MBJr LEKePzOGXaOCCFMwgghPMA4GA1UdDwEB/wQEAwIHgDAdBgNVHSUEFjAUBggrBgEF BQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUx8v4pvV4oiIV dFrCTbnNtesTY4YwHwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+vnYsUwsYwVQYI KwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5sZW5jci5vcmcw IgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wggZZBgNVHREEggZQ 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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 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CERTIFICATE----- --- Server certificate subject=CN = t-online.de issuer=C = US, O = Let's Encrypt, CN = R3 --- No client certificate CA names sent Peer signing digest: SHA256 Peer signature type: ECDSA Server Temp Key: X25519, 253 bits --- SSL handshake has read 4344 bytes and written 402 bytes Verification: OK --- New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384 Server public key is 256 bit Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE No ALPN negotiated Early data was not sent Verify return code: 0 (ok) --- DONE