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 (45 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: | 151.101.1.29 |
Reverse IP lookup: | No records found |
Nameserver: | ns01.r9dns.net. |
Nameserver: | ns02.r9dns.net. |
Nameserver: | ns03.r9dns.net. |
Nameserver: | ns04.r9dns.net. |
Nameserver: | dns1.p10.nsone.net. |
Nameserver: | dns2.p10.nsone.net. |
Nameserver: | dns3.p10.nsone.net. |
Nameserver: | dns4.p10.nsone.net. |
General Information
Common Name: | kayak.co.uk |
SANs: | DNS:kayak.co.uk Total number of SANs: 1 |
Signature Algorithm: | sha256WithRSAEncryption |
Key Type: | RSA |
Key size: | 2048 bits |
Serial Number: | 3201519c0009f0f801cd09e882dd39e223d |
Not Before: | Mar 12, 2024 15:22:04 GMT |
Not After: | Jun 10, 2024 15:22:03 GMT |
Number of certs: | 3 |
Revocation Status: | good |
OCSP Stapling: | Supported |
Server: | Varnish |
HSTS: | Not Supported |
HPKP: | Not Supported |
Chain Information
Certificate # 1 - Common Name: kayak.co.uk
Decode this certificate for verbose information → launchSubject Common Name | kayak.co.uk |
Issuer Common Name | R3 |
Issuer Organization | Let's Encrypt |
Not Before: | Mar 12, 2024 15:22:04 GMT |
Not After: | Jun 10, 2024 15:22:03 GMT |
Signature Algorithm: | sha256WithRSAEncryption |
Serial Number: | 3201519c0009f0f801cd09e882dd39e223d |
SHA1 Fingerprint: | B5:56:40:9D:2E:9D:8D:C3:7E:FA:FA:6F:CE:3A:50:E4:51:76:CD:68 |
MD5 Fingerprint: | AB:95:F4:6D:C1:FD:D4:5C:CA:0B:A8:87:55:C8:6F:B7 |
Certificate # 2 - Common Name: R3
Decode this certificate for verbose information → launchIn 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 |
Certificate # 3 - Common Name: ISRG Root X1
Decode this certificate for verbose information → launchIn place? | Yes, this certificate directly certifies the preceding one |
Subject Common Name | ISRG Root X1 |
Subject Organization | Internet Security Research Group |
Issuer Common Name | DST Root CA X3 |
Issuer Organization | Digital Signature Trust Co. |
Not Before: | Jan 20, 2021 19:14:03 GMT |
Not After: | Sep 30, 2024 18:14:03 GMT |
Signature Algorithm: | sha256WithRSAEncryption |
Serial Number: | 4001772137d4e942b8ee76aa3c640ab7 |
SHA1 Fingerprint: | 93:3C:6D:DE:E9:5C:9C:41:A4:0F:9F:50:49:3D:82:BE:03:AD:87:BF |
MD5 Fingerprint: | C1:E1:FF:07:F9:F6:88:49:82:74:D1:A1:80:53:EA:BF |
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 = kayak.co.uk verify return:1 CONNECTED(00000003) OCSP response: ====================================== OCSP Response Data: OCSP Response Status: successful (0x0) Response Type: Basic OCSP Response Version: 1 (0x0) Responder Id: C = US, O = Let's Encrypt, CN = R3 Produced At: Apr 20 07:47:00 2024 GMT Responses: Certificate ID: Hash Algorithm: sha1 Issuer Name Hash: 48DAC9A0FB2BD32D4FF0DE68D2F567B735F9B3C4 Issuer Key Hash: 142EB317B75856CBAE500940E61FAF9D8B14C2C6 Serial Number: 03201519C0009F0F801CD09E882DD39E223D Cert Status: good This Update: Apr 20 07:47:00 2024 GMT Next Update: Apr 27 07:46:58 2024 GMT Signature Algorithm: sha256WithRSAEncryption 66:37:20:ee:c4:d7:db:5f:32:63:24:82:07:d1:73:6a:95:13: 53:d3:1d:17:54:16:6b:29:6a:36:61:0f:d9:ee:5f:aa:d7:f8: cb:4d:42:80:c7:14:a9:27:c9:08:04:66:4e:06:5f:25:08:af: 99:5c:10:e6:e2:02:a3:58:9b:24:c2:ed:08:68:1e:53:db:ad: 7c:b5:4a:96:a2:d7:4e:46:00:4c:74:00:2d:f3:40:36:8e:6d: d9:cb:89:7a:bd:0b:3f:c2:0e:e6:44:99:5d:fd:ee:50:54:33: a6:e9:97:b7:24:f1:22:32:9f:40:27:ec:e2:a2:13:e7:e6:5c: d4:a8:49:2e:5c:c3:16:ae:77:8f:00:7a:74:1b:22:e8:a2:55: cd:20:a3:6b:db:fc:88:38:5e:9e:c9:38:72:8f:3f:36:b6:83: 62:e0:41:a4:71:e0:c5:25:eb:c9:0e:bd:3d:31:0a:75:4d:53: a2:b9:5a:14:5a:d3:8a:8a:07:05:93:6c:7a:17:78:90:e7:33: 0b:57:b9:1c:b3:89:f3:b0:c9:d9:03:94:29:4f:38:c2:07:4a: b4:0d:22:e7:02:a8:94:2f:c4:54:f3:16:e4:b0:45:27:da:98: 09:88:a4:27:90:6d:87:2d:a3:bf:93:6b:29:53:b3:d8:77:ea: 89:ea:46:b1 ====================================== --- Certificate chain 0 s:CN = kayak.co.uk i:C = US, O = Let's Encrypt, CN = R3 -----BEGIN CERTIFICATE----- MIIE4jCCA8qgAwIBAgISAyAVGcAAnw+AHNCeiC3TniI9MA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDAzMTIxNTIyMDRaFw0yNDA2MTAxNTIyMDNaMBYxFDASBgNVBAMT C2theWFrLmNvLnVrMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvOn+ ZALHXJEkc4oqyBjeGGf9TgNn+N+ivALF1a2mcbpkFFbquysWGJ75AAGtN27JAiL9 V1/sTzbjWuXbfFMKnKMXHNgcCl7zLDslYzdrMXt2nQLEyBiuUaBFeboB502lW2K+ KHFxcmwGJl69PRPw5MpVcOSexXi0fZqZ2TYryMUKL3AY0N7+RiZJU/3XKpfRny42 HQTyf4sMNKt6q4GJx0onjaFmGFAFhqZLRetrpM5psYm+l2LZSwrVqv3mbmmK63wU X+7pLmlJt6eGd4KRGGVvBRv7APUUD1l4wm/QS1Rn24WFX8wV4lZOfEALUoOaSCUj WTIcWFJU8VDj/GLwbQIDAQABo4ICDDCCAggwDgYDVR0PAQH/BAQDAgWgMB0GA1Ud JQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQW BBQmYst0/YHL8BKN0ti5WEnj9ih5GzAfBgNVHSMEGDAWgBQULrMXt1hWy65QCUDm H6+dixTCxjBVBggrBgEFBQcBAQRJMEcwIQYIKwYBBQUHMAGGFWh0dHA6Ly9yMy5v LmxlbmNyLm9yZzAiBggrBgEFBQcwAoYWaHR0cDovL3IzLmkubGVuY3Iub3JnLzAW BgNVHREEDzANggtrYXlhay5jby51azATBgNVHSAEDDAKMAgGBmeBDAECATCCAQMG CisGAQQB1nkCBAIEgfQEgfEA7wB2AEiw42vapkc0D+VqAvqdMOscUgHLVt0sgdm7 v6s52IRzAAABjjN4liMAAAQDAEcwRQIhAKNWvizF73wkPiJELUaQcb3e+Nu1fgge Npf2Ow3Cy6Y3AiBtOHM+0kCVvHLPe02wSICnuIrFRpTEa5QuyNakvAbvVgB1AKLi v9Ye3i8vB6DWTm03p9xlQ7DGtS6i2reK+Jpt9RfYAAABjjN4ljUAAAQDAEYwRAIg ArxUcpxjsphv+582OUKdjGkhfFKku//7J/PCtke4WEYCIBxcQiGMzq8hB2BdGqdk x5ryDsc4vLXDieTXK9dy1n1XMA0GCSqGSIb3DQEBCwUAA4IBAQCdxlhWUksOnBjq pOUD/xnNtkq88c/SXYQt16LpELgH6w15dspZtavBYlL4UBGaEFjhE6Tokck5Txd7 xVUev5R8oj1VKTTJw9qbLYIa0DPzppQ3c1+9fEN5Jeguoyha9wy9LLrsrGWXI3q6 QEYDIrJWr0uhkioAucV20Ew3QS5AbRFBCFPAERN6MqZZXe/ja9vEgw4nJTdYDwy/ CTCKvHEyxnib/zho0jSTnTc0HLMWbOa4cbbSa7vGssfyL+/A+NJxVldM7xW8e9Ea NiAkRHHrXHfmE1Sch4OWInH5wR75Cym9Y3Xt+g8kfZhlXWX2QfJNQ1MUyl+1fS/I Ja7orY0/ -----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 Oi8veDEuYy5sZW5jci5vcmcvMCIGA1UdIAQbMBkwCAYGZ4EMAQIBMA0GCysGAQQB gt8TAQEBMA0GCSqGSIb3DQEBCwUAA4ICAQCFyk5HPqP3hUSFvNVneLKYY611TR6W PTNlclQtgaDqw+34IL9fzLdwALduO/ZelN7kIJ+m74uyA+eitRY8kc607TkC53wl ikfmZW4/RvTZ8M6UK+5UzhK8jCdLuMGYL6KvzXGRSgi3yLgjewQtCPkIVz6D2QQz CkcheAmCJ8MqyJu5zlzyZMjAvnnAT45tRAxekrsu94sQ4egdRCnbWSDtY7kh+BIm lJNXoB1lBMEKIq4QDUOXoRgffuDghje1WrG9ML+Hbisq/yFOGwXD9RiX8F6sw6W4 avAuvDszue5L3sz85K+EC4Y/wFVDNvZo4TYXao6Z0f+lQKc0t8DQYzk1OXVu8rp2 yJMC6alLbBfODALZvYH7n7do1AZls4I9d1P4jnkDrQoxB3UqQ9hVl3LEKQ73xF1O yK5GhDDX8oVfGKF5u+decIsH4YaTw7mP3GFxJSqv3+0lUFJoi5Lc5da149p90Ids hCExroL1+7mryIkXPeFM5TgO9r0rvZaBFOvV2z0gp35Z0+L4WPlbuEjN/lxPFin+ HlUjr8gRsI3qfJOQFy/9rKIJR0Y/8Omwt/8oTWgy1mdeHmmjk7j1nYsvC9JSQ6Zv MldlTTKB3zhThV1+XWYp6rjd5JW1zbVWEkLNxE7GJThEUG3szgBVGP7pSWTUTsqX nLRbwHOoq7hHwg== -----END CERTIFICATE----- 2 s:C = US, O = Internet Security Research Group, CN = ISRG Root X1 i:O = Digital Signature Trust Co., CN = DST Root CA X3 -----BEGIN CERTIFICATE----- MIIFYDCCBEigAwIBAgIQQAF3ITfU6UK47naqPGQKtzANBgkqhkiG9w0BAQsFADA/ MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT DkRTVCBSb290IENBIFgzMB4XDTIxMDEyMDE5MTQwM1oXDTI0MDkzMDE4MTQwM1ow TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwggIiMA0GCSqGSIb3DQEB AQUAA4ICDwAwggIKAoICAQCt6CRz9BQ385ueK1coHIe+3LffOJCMbjzmV6B493XC ov71am72AE8o295ohmxEk7axY/0UEmu/H9LqMZshftEzPLpI9d1537O4/xLxIZpL wYqGcWlKZmZsj348cL+tKSIG8+TA5oCu4kuPt5l+lAOf00eXfJlII1PoOK5PCm+D LtFJV4yAdLbaL9A4jXsDcCEbdfIwPPqPrt3aY6vrFk/CjhFLfs8L6P+1dy70sntK 4EwSJQxwjQMpoOFTJOwT2e4ZvxCzSow/iaNhUd6shweU9GNx7C7ib1uYgeGJXDR5 bHbvO5BieebbpJovJsXQEOEO3tkQjhb7t/eo98flAgeYjzYIlefiN5YNNnWe+w5y sR2bvAP5SQXYgd0FtCrWQemsAXaVCg/Y39W9Eh81LygXbNKYwagJZHduRze6zqxZ Xmidf3LWicUGQSk+WT7dJvUkyRGnWqNMQB9GoZm1pzpRboY7nn1ypxIFeFntPlF4 FQsDj43QLwWyPntKHEtzBRL8xurgUBN8Q5N0s8p0544fAQjQMNRbcTa0B7rBMDBc SLeCO5imfWCKoqMpgsy6vYMEG6KDA0Gh1gXxG8K28Kh8hjtGqEgqiNx2mna/H2ql PRmP6zjzZN7IKw0KKP/32+IVQtQi0Cdd4Xn+GOdwiK1O5tmLOsbdJ1Fu/7xk9TND TwIDAQABo4IBRjCCAUIwDwYDVR0TAQH/BAUwAwEB/zAOBgNVHQ8BAf8EBAMCAQYw SwYIKwYBBQUHAQEEPzA9MDsGCCsGAQUFBzAChi9odHRwOi8vYXBwcy5pZGVudHJ1 c3QuY29tL3Jvb3RzL2RzdHJvb3RjYXgzLnA3YzAfBgNVHSMEGDAWgBTEp7Gkeyxx +tvhS5B1/8QVYIWJEDBUBgNVHSAETTBLMAgGBmeBDAECATA/BgsrBgEEAYLfEwEB ATAwMC4GCCsGAQUFBwIBFiJodHRwOi8vY3BzLnJvb3QteDEubGV0c2VuY3J5cHQu b3JnMDwGA1UdHwQ1MDMwMaAvoC2GK2h0dHA6Ly9jcmwuaWRlbnRydXN0LmNvbS9E U1RST09UQ0FYM0NSTC5jcmwwHQYDVR0OBBYEFHm0WeZ7tuXkAXOACIjIGlj26Ztu MA0GCSqGSIb3DQEBCwUAA4IBAQAKcwBslm7/DlLQrt2M51oGrS+o44+/yQoDFVDC 5WxCu2+b9LRPwkSICHXM6webFGJueN7sJ7o5XPWioW5WlHAQU7G75K/QosMrAdSW 9MUgNTP52GE24HGNtLi1qoJFlcDyqSMo59ahy2cI2qBDLKobkx/J3vWraV0T9VuG WCLKTVXkcGdtwlfFRjlBz4pYg1htmf5X6DYO8A4jqv2Il9DjXA6USbW1FzXSLr9O he8Y4IWS6wY7bCkjCWDcRQJMEhg76fsO3txE+FiYruq9RUWhiF1myv4Q6W+CyBFC Dfvp7OOGAN6dEOM4+qR9sdjoSYKEBpsr6GtPAQw4dy753ec5 -----END CERTIFICATE----- --- Server certificate subject=CN = kayak.co.uk issuer=C = US, O = Let's Encrypt, CN = R3 --- No client certificate CA names sent Peer signing digest: SHA256 Peer signature type: RSA-PSS Server Temp Key: X25519, 253 bits --- SSL handshake has read 5005 bytes and written 386 bytes Verification: OK --- New, TLSv1.3, Cipher is TLS_AES_128_GCM_SHA256 Server public key is 2048 bit Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE No ALPN negotiated Early data was not sent Verify return code: 0 (ok) --- DONE --- Post-Handshake New Session Ticket arrived: SSL-Session: Protocol : TLSv1.3 Cipher : TLS_AES_128_GCM_SHA256 Session-ID: D6A34BB3ED442C35898C12401BE8311EDBA2875FAD354221312C9EDEBE350BBB Session-ID-ctx: Resumption PSK: BFB261B801E957038FBDDAD6E39B78E31084289B19CE34FE48B75AF75A224461 PSK identity: None PSK identity hint: None SRP username: None TLS session ticket lifetime hint: 3600 (seconds) TLS session ticket: 0000 - 2f f9 a6 c3 2a 6d 4d a6-f3 3f 6c 6b 17 04 aa 17 /...*mM..?lk.... 0010 - af 18 05 81 1f d7 be 33-44 a2 18 8e e3 33 6e 32 .......3D....3n2 0020 - bb fd ef 6c 23 53 bc 6f-12 c8 fe 47 ea 8f 61 4d ...l#S.o...G..aM 0030 - 75 ef e1 8b 63 7c cd e0-fb 37 d1 24 3a 89 fa ef u...c|...7.$:... 0040 - fe d2 ac d4 32 52 92 50-a6 1a a1 00 c8 00 26 c5 ....2R.P......&. 0050 - 12 ff 59 0d ea 30 85 66-b2 13 46 50 1a 3e 5f 40 ..Y..0.f..FP.>_@ 0060 - df 24 e5 6b 79 fc f9 f8-b1 51 81 63 21 c3 36 6a .$.ky....Q.c!.6j 0070 - de 19 d4 14 57 8f fb 6b-26 9a 26 0b 15 74 11 46 ....W..k&.&..t.F 0080 - 53 08 f3 9b 44 2a 71 1d-f7 cc 42 b5 04 4c 10 66 S...D*q...B..L.f 0090 - 5d 22 6e f8 9d a2 27 35-43 6c f0 02 bf 32 2b 04 ]"n...'5Cl...2+. Start Time: 1714100383 Timeout : 7200 (sec) Verify return code: 0 (ok) Extended master secret: no Max Early Data: 8192 --- read R BLOCK