SSL Server Test: cdn.redhat.com (Powered by Qualys SSL Labs)

SSL Report: cdn.redhat.com (184.84.192.251)

Assessed on: Tue, 10 Jun 2025 02:18:39 UTC | Clear cache

Due to a recently discovered bug in Apple's code, your browser is exposed to MITM attacks. Click here for more information.

Summary

Overall Rating

If trust issues are ignored: B

100

Certificate

Protocol Support

Key Exchange

Cipher Strength

Visit our documentation page for more information, configuration guides, and books. Known issues are documented here.

This server's certificate is not trusted, see below for details.

This server's certificate is not trusted by major browsers. MORE INFO »

This server supports TLS 1.0 and TLS 1.1. Grade capped to B. MORE INFO »

This server supports TLS 1.3. MORE INFO »

DNS Certification Authority Authorization (CAA) Policy found for this domain. MORE INFO »

Certificate #1: RSA 4096 bits (SHA256withRSA)

Server Key and Certificate #1
Subject	cdn.redhat.com Fingerprint SHA256: 4ff4ade194d69a3941f1e0a76175b0d62a2e730183751234e1f00205826bc98a Pin SHA256: zaHut+S5T+MLYujfAUVRfbLHpDNneLYB2VOMlW6d1v4=
Common names	cdn.redhat.com
Alternative names	cdn-legacy.redhat.com cdn.redhat.com cdn6-legacy.redhat.com cdn6.redhat.com stagecdn-legacy.redhat.com stagecdn.redhat.com
Serial Number	0321
Valid from	Wed, 12 Jun 2024 15:13:50 UTC
Valid until	Sun, 11 Jun 2028 15:13:50 UTC (expires in 3 years)
Key	RSA 4096 bits (e 65537)
Weak key (Debian)	No
Issuer	Red Hat Entitlement Operations Authority
Signature algorithm	SHA256withRSA
Extended Validation	No
Certificate Transparency	No
OCSP Must Staple	No
Revocation information	OCSP OCSP: http://ocsp.rhsm.redhat.com/
Revocation status	Unchecked (only trusted certificates can be checked)
DNS CAA	Yes policy host: redhat.com iodef: mailto:it-cert-admin@redhat.com flags:0 issue: letsencrypt.org flags:0 issue: digicert.com flags:0 issue: amazontrust.com flags:0
Trusted	No NOT TRUSTED (Why?) Mozilla Apple Android Java Windows

Additional Certificates (if supplied)
Certificates provided	3 (5283 bytes)
Chain issues	Contains anchor
#2
Subject	Red Hat Entitlement Operations Authority Fingerprint SHA256: 7dc2ff43fa6696e8f49485d2ee21737cfbd42a7d7bd33a337ba6e711f3ec1f85 Pin SHA256: RUBUhhwqE2IH7R+CKBzaCFtNuDZohZhLXWlx3WaDmIY=
Valid until	Fri, 15 Mar 2030 18:13:21 UTC (expires in 4 years and 9 months)
Key	RSA 4096 bits (e 65537)
Issuer	Entitlement Master CA
Signature algorithm	SHA384withRSA
#3
Subject	Entitlement Master CA Not in trust store Fingerprint SHA256: 8e0f31be129b55fcfec055b584a7a646766f85861a64e486daf8235f0c81ee76 Pin SHA256: RwlO/itCIaOiSPD9dneNqtVaHTr4s1X9sJ6/eFLepgg=
Valid until	Tue, 12 Mar 2030 19:00:44 UTC (expires in 4 years and 9 months)
Key	RSA 4096 bits (e 65537)
Issuer	Entitlement Master CA Self-signed
Signature algorithm	SHA1withRSA Weak, but no impact on root certificate

Certification Paths


Path #1: Not trusted (path does not chain to a trusted anchor)
1	Sent by server	cdn.redhat.com Fingerprint SHA256: 4ff4ade194d69a3941f1e0a76175b0d62a2e730183751234e1f00205826bc98a Pin SHA256: zaHut+S5T+MLYujfAUVRfbLHpDNneLYB2VOMlW6d1v4= RSA 4096 bits (e 65537) / SHA256withRSA
2	Sent by server	Red Hat Entitlement Operations Authority Fingerprint SHA256: 7dc2ff43fa6696e8f49485d2ee21737cfbd42a7d7bd33a337ba6e711f3ec1f85 Pin SHA256: RUBUhhwqE2IH7R+CKBzaCFtNuDZohZhLXWlx3WaDmIY= RSA 4096 bits (e 65537) / SHA384withRSA
3	Sent by server Not in trust store	Entitlement Master CA Self-signed Fingerprint SHA256: 8e0f31be129b55fcfec055b584a7a646766f85861a64e486daf8235f0c81ee76 Pin SHA256: RwlO/itCIaOiSPD9dneNqtVaHTr4s1X9sJ6/eFLepgg= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1	Sent by server	cdn.redhat.com Fingerprint SHA256: 4ff4ade194d69a3941f1e0a76175b0d62a2e730183751234e1f00205826bc98a Pin SHA256: zaHut+S5T+MLYujfAUVRfbLHpDNneLYB2VOMlW6d1v4= RSA 4096 bits (e 65537) / SHA256withRSA
2	Sent by server	Red Hat Entitlement Operations Authority Fingerprint SHA256: 7dc2ff43fa6696e8f49485d2ee21737cfbd42a7d7bd33a337ba6e711f3ec1f85 Pin SHA256: RUBUhhwqE2IH7R+CKBzaCFtNuDZohZhLXWlx3WaDmIY= RSA 4096 bits (e 65537) / SHA384withRSA
3	Sent by server Not in trust store	Entitlement Master CA Self-signed Fingerprint SHA256: 8e0f31be129b55fcfec055b584a7a646766f85861a64e486daf8235f0c81ee76 Pin SHA256: RwlO/itCIaOiSPD9dneNqtVaHTr4s1X9sJ6/eFLepgg= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1	Sent by server	cdn.redhat.com Fingerprint SHA256: 4ff4ade194d69a3941f1e0a76175b0d62a2e730183751234e1f00205826bc98a Pin SHA256: zaHut+S5T+MLYujfAUVRfbLHpDNneLYB2VOMlW6d1v4= RSA 4096 bits (e 65537) / SHA256withRSA
2	Sent by server	Red Hat Entitlement Operations Authority Fingerprint SHA256: 7dc2ff43fa6696e8f49485d2ee21737cfbd42a7d7bd33a337ba6e711f3ec1f85 Pin SHA256: RUBUhhwqE2IH7R+CKBzaCFtNuDZohZhLXWlx3WaDmIY= RSA 4096 bits (e 65537) / SHA384withRSA
3	Sent by server Not in trust store	Entitlement Master CA Self-signed Fingerprint SHA256: 8e0f31be129b55fcfec055b584a7a646766f85861a64e486daf8235f0c81ee76 Pin SHA256: RwlO/itCIaOiSPD9dneNqtVaHTr4s1X9sJ6/eFLepgg= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1	Sent by server	cdn.redhat.com Fingerprint SHA256: 4ff4ade194d69a3941f1e0a76175b0d62a2e730183751234e1f00205826bc98a Pin SHA256: zaHut+S5T+MLYujfAUVRfbLHpDNneLYB2VOMlW6d1v4= RSA 4096 bits (e 65537) / SHA256withRSA
2	Sent by server	Red Hat Entitlement Operations Authority Fingerprint SHA256: 7dc2ff43fa6696e8f49485d2ee21737cfbd42a7d7bd33a337ba6e711f3ec1f85 Pin SHA256: RUBUhhwqE2IH7R+CKBzaCFtNuDZohZhLXWlx3WaDmIY= RSA 4096 bits (e 65537) / SHA384withRSA
3	Sent by server Not in trust store	Entitlement Master CA Self-signed Fingerprint SHA256: 8e0f31be129b55fcfec055b584a7a646766f85861a64e486daf8235f0c81ee76 Pin SHA256: RwlO/itCIaOiSPD9dneNqtVaHTr4s1X9sJ6/eFLepgg= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate
Path #1: Not trusted (path does not chain to a trusted anchor)
1	Sent by server	cdn.redhat.com Fingerprint SHA256: 4ff4ade194d69a3941f1e0a76175b0d62a2e730183751234e1f00205826bc98a Pin SHA256: zaHut+S5T+MLYujfAUVRfbLHpDNneLYB2VOMlW6d1v4= RSA 4096 bits (e 65537) / SHA256withRSA
2	Sent by server	Red Hat Entitlement Operations Authority Fingerprint SHA256: 7dc2ff43fa6696e8f49485d2ee21737cfbd42a7d7bd33a337ba6e711f3ec1f85 Pin SHA256: RUBUhhwqE2IH7R+CKBzaCFtNuDZohZhLXWlx3WaDmIY= RSA 4096 bits (e 65537) / SHA384withRSA
3	Sent by server Not in trust store	Entitlement Master CA Self-signed Fingerprint SHA256: 8e0f31be129b55fcfec055b584a7a646766f85861a64e486daf8235f0c81ee76 Pin SHA256: RwlO/itCIaOiSPD9dneNqtVaHTr4s1X9sJ6/eFLepgg= RSA 4096 bits (e 65537) / SHA1withRSA Weak or insecure signature, but no impact on root certificate

Click here to expand

Configuration

Protocols
TLS 1.3	Yes
TLS 1.2	Yes
TLS 1.1	Yes
TLS 1.0	Yes
SSL 3	No
SSL 2	No

Cipher Suites
# TLS 1.3 (suites in server-preferred order)
TLS_AES_256_GCM_SHA384 (`0x1302`) ECDH x25519 (eq. 3072 bits RSA) FS	256
TLS_CHACHA20_POLY1305_SHA256 (`0x1303`) ECDH x25519 (eq. 3072 bits RSA) FS	256^P
TLS_AES_128_GCM_SHA256 (`0x1301`) ECDH x25519 (eq. 3072 bits RSA) FS	128
TLS_AES_128_CCM_8_SHA256 (`0x1305`) ECDH x25519 (eq. 3072 bits RSA) FS	128
TLS_AES_128_CCM_SHA256 (`0x1304`) ECDH x25519 (eq. 3072 bits RSA) FS	128
# TLS 1.2 (suites in server-preferred order)
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (`0xc030`) ECDH secp256r1 (eq. 3072 bits RSA) FS	256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (`0xc02f`) ECDH secp256r1 (eq. 3072 bits RSA) FS	128
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (`0xcca8`) ECDH secp256r1 (eq. 3072 bits RSA) FS	256^P
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (`0xc028`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (`0xc027`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	128
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (`0xc014`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (`0xc013`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	128
TLS_RSA_WITH_AES_256_GCM_SHA384 (`0x9d`) WEAK	256
TLS_RSA_WITH_AES_128_GCM_SHA256 (`0x9c`) WEAK	128
TLS_RSA_WITH_AES_256_CBC_SHA256 (`0x3d`) WEAK	256
TLS_RSA_WITH_AES_128_CBC_SHA256 (`0x3c`) WEAK	128
TLS_RSA_WITH_AES_256_CBC_SHA (`0x35`) WEAK	256
TLS_RSA_WITH_AES_128_CBC_SHA (`0x2f`) WEAK	128
# TLS 1.1 (suites in server-preferred order)
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (`0xc014`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (`0xc013`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	128
TLS_RSA_WITH_AES_256_CBC_SHA (`0x35`) WEAK	256
TLS_RSA_WITH_AES_128_CBC_SHA (`0x2f`) WEAK	128
# TLS 1.0 (suites in server-preferred order)
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (`0xc014`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (`0xc013`) ECDH secp256r1 (eq. 3072 bits RSA) FS WEAK	128
TLS_RSA_WITH_AES_256_CBC_SHA (`0x35`) WEAK	256
TLS_RSA_WITH_AES_128_CBC_SHA (`0x2f`) WEAK	128
(P) This server prefers ChaCha20 suites with clients that don't have AES-NI (e.g., Android devices)

Handshake Simulation
Android 2.3.7 No SNI ²	RSA 4096 (SHA256)	TLS 1.0	TLS_RSA_WITH_AES_128_CBC_SHA No FS
Android 4.0.4	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
Android 4.1.1	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
Android 4.2.2	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
Android 4.3	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
Android 4.4.2	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Android 5.0.0	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Android 6.0	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Android 7.0	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 ECDH secp256r1 FS
Android 8.0	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 ECDH secp256r1 FS
Android 8.1	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256 ECDH x25519 FS
Android 9.0	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256 ECDH x25519 FS
Baidu Jan 2015	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
BingPreview Jan 2015	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Chrome 49 / XP SP3	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Chrome 69 / Win 7 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Chrome 70 / Win 10	-	TLS 1.3	TLS_AES_256_GCM_SHA384 ECDH x25519 FS
Chrome 80 / Win 10 R	-	TLS 1.3	TLS_AES_256_GCM_SHA384 ECDH x25519 FS
Firefox 31.3.0 ESR / Win 7	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Firefox 47 / Win 7 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Firefox 49 / XP SP3	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Firefox 62 / Win 7 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Firefox 73 / Win 10 R	-	TLS 1.3	TLS_AES_256_GCM_SHA384 ECDH x25519 FS
Googlebot Feb 2018	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
IE 7 / Vista	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
IE 8 / XP No FS ¹ No SNI ²	Server sent fatal alert: handshake_failure
IE 8-10 / Win 7 R	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
IE 11 / Win 7 R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
IE 11 / Win 8.1 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
IE 10 / Win Phone 8.0	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
IE 11 / Win Phone 8.1 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 ECDH secp256r1 FS
IE 11 / Win Phone 8.1 Update R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
IE 11 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Edge 15 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Edge 16 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Edge 18 / Win 10 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Edge 13 / Win Phone 10 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Java 6u45 No SNI ²	RSA 4096 (SHA256)	TLS 1.0	TLS_RSA_WITH_AES_128_CBC_SHA No FS
Java 7u25	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA ECDH secp256r1 FS
Java 8u161	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Java 11.0.3	-	TLS 1.3	TLS_AES_256_GCM_SHA384 ECDH secp256r1 FS
Java 12.0.1	-	TLS 1.3	TLS_AES_256_GCM_SHA384 ECDH secp256r1 FS
OpenSSL 0.9.8y	RSA 4096 (SHA256)	TLS 1.0	TLS_RSA_WITH_AES_256_CBC_SHA No FS
OpenSSL 1.0.1l R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
OpenSSL 1.0.2s R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
OpenSSL 1.1.0k R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
OpenSSL 1.1.1c R	-	TLS 1.3	TLS_AES_256_GCM_SHA384 ECDH x25519 FS
Safari 5.1.9 / OS X 10.6.8	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
Safari 6 / iOS 6.0.1	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
Safari 6.0.4 / OS X 10.8.4 R	RSA 4096 (SHA256)	TLS 1.0	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS
Safari 7 / iOS 7.1 R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
Safari 7 / OS X 10.9 R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
Safari 8 / iOS 8.4 R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
Safari 8 / OS X 10.10 R	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS
Safari 9 / iOS 9 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Safari 9 / OS X 10.11 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Safari 10 / iOS 10 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Safari 10 / OS X 10.12 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Safari 12.1.2 / MacOS 10.14.6 Beta R	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256 ECDH x25519 FS
Safari 12.1.1 / iOS 12.3.1 R	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256 ECDH x25519 FS
Apple ATS 9 / iOS 9 R	RSA 4096 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
Yahoo Slurp Jan 2015	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
YandexBot Jan 2015	RSA 4096 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS
# Not simulated clients (Protocol mismatch)
IE 6 / XP No FS ¹ No SNI ²	Protocol mismatch (not simulated)
Click here to expand
(1) Clients that do not support Forward Secrecy (FS) are excluded when determining support for it.
(2) No support for virtual SSL hosting (SNI). Connects to the default site if the server uses SNI.
(3) Only first connection attempt simulated. Browsers sometimes retry with a lower protocol version.
(R) Denotes a reference browser or client, with which we expect better effective security.
(All) We use defaults, but some platforms do not use their best protocols and features (e.g., Java 6 & 7, older IE).
(All) Certificate trust is not checked in handshake simulation, we only perform TLS handshake.

Protocol Details
Secure Renegotiation	Supported
Secure Client-Initiated Renegotiation	No
Insecure Client-Initiated Renegotiation	No
BEAST attack	Not mitigated server-side (more info) TLS 1.0: `0xc014`
POODLE (SSLv3)	No, SSL 3 not supported (more info)
POODLE (TLS)	No (more info)
Zombie POODLE	No (more info) TLS 1.2 : `0xc027`
GOLDENDOODLE	No (more info) TLS 1.2 : `0xc027`
OpenSSL 0-Length	No (more info) TLS 1.2 : `0xc027`
Sleeping POODLE	No (more info) TLS 1.2 : `0xc027`
Downgrade attack prevention	Yes, TLS_FALLBACK_SCSV supported (more info)
SSL/TLS compression	No
RC4	No
Heartbeat (extension)	No
Heartbleed (vulnerability)	No (more info)
Ticketbleed (vulnerability)	No (more info)
OpenSSL CCS vuln. (CVE-2014-0224)	No (more info)
OpenSSL Padding Oracle vuln. (CVE-2016-2107)	No (more info)
ROBOT (vulnerability)	No (more info)
Forward Secrecy	With modern browsers (more info)
ALPN	Yes http/1.1
NPN	Yes http/1.1 http/1.0
Session resumption (caching)	Yes
Session resumption (tickets)	Yes
OCSP stapling	Yes (not verified because the certificate is not trusted)
Strict Transport Security (HSTS)	No
HSTS Preloading	Not in: Chrome Edge Firefox IE
Public Key Pinning (HPKP)	No (more info)
Public Key Pinning Report-Only	No
Public Key Pinning (Static)	No (more info)
Long handshake intolerance	No
TLS extension intolerance	No
TLS version intolerance	No
Incorrect SNI alerts	No
Uses common DH primes	No, DHE suites not supported
DH public server param (Ys) reuse	No, DHE suites not supported
ECDH public server param reuse	No
Supported Named Groups	secp256r1, x25519 (server preferred order)
SSL 2 handshake compatibility	Yes
0-RTT enabled	No

HTTP Requests

1 https://cdn.redhat.com/ (HTTP/1.1 403 Forbidden)
1
	Server	AkamaiGHost
	Mime-Version	1.0
	Content-Type	text/html
	Content-Length	368
	Expires	Tue, 10 Jun 2025 02:17:37 GMT
	Date	Tue, 10 Jun 2025 02:17:37 GMT
	Connection	close
	x-rh-edge-request-id	174be01b
	x-rh-edge-reference-id	0.855ed617.1749521857.174be01b
	x-rh-edge-cache-status	Error from child
	x-rh-origin	cf

Miscellaneous
Test date	Tue, 10 Jun 2025 02:17:21 UTC
Test duration	78.138 seconds
HTTP status code	403
HTTP server signature	AkamaiGHost
Server hostname	a184-84-192-251.deploy.static.akamaitechnologies.com

Why is my certificate not trusted?

There are many reasons why a certificate may not be trusted. The exact problem is indicated on the report card in bright red. The problems fall into three categories:

Invalid certificate
Invalid configuration
Unknown Certificate Authority

1. Invalid certificate

A certificate is invalid if:

It is used before its activation date
It is used after its expiry date
Certificate hostnames don't match the site hostname
It has been revoked
It has insecure signature
It has been blacklisted

2. Invalid configuration

In some cases, the certificate chain does not contain all the necessary certificates to connect the web server certificate to one of the root certificates in our trust store. Less commonly, one of the certificates in the chain (other than the web server certificate) will have expired, and that invalidates the entire chain.

3. Unknown Certificate Authority

In order for trust to be established, we must have the root certificate of the signing Certificate Authority in our trust store. SSL Labs does not maintain its own trust store; instead we use the store maintained by Mozilla.

If we mark a web site as not trusted, that means that the average web user's browser will not trust it either. For certain special groups of users, such web sites can still be secure. For example, if you can securely verify that a self-signed web site is operated by a person you trust, then you can trust that self-signed web site too. Or, if you work for an organisation that manages its own trust, and you have their own root certificate already embedded in your browser. Such special cases do not work for the general public, however, and this is what we indicate on our report card.

4. Interoperability issues

In some rare cases trust cannot be established because of interoperability issues between our code and the code or configuration running on the server. We manually review such cases, but if you encounter such an issue please feel free to contact us. Such problems are very difficult to troubleshoot and you may be able to provide us with information that might help us determine the root cause.

SSL Report v2.4.0

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