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

SSL Report: twitter.com (162.159.140.229)

Assessed on: Sat, 21 Feb 2026 23:34:35 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

A+

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 site works only in browsers with SNI support.

This server supports TLS 1.3. MORE INFO »

HTTP Strict Transport Security (HSTS) with long duration deployed on this server. MORE INFO »

Certificate #1: EC 256 bits (SHA384withECDSA)

Server Key and Certificate #1
Subject	twitter.com Fingerprint SHA256: 3532aaf1953b62145745124c1636062962991e931030173695254db0b8a265b7 Pin SHA256: NUG7g/7r86ZThKNE7Cd9rc/KF2LnSBeD2blSxGHNI7Q=
Common names	twitter.com
Alternative names	*.twitter.com cdn.syndication.twitter.com twitter.com
Serial Number	0653eba78465e5ced5ffe13a91a9ca997609
Valid from	Sun, 01 Feb 2026 15:29:31 UTC
Valid until	Sat, 02 May 2026 15:29:30 UTC (expires in 2 months and 10 days)
Key	EC 256 bits
Weak key (Debian)	No
Issuer	E7 AIA: http://e7.i.lencr.org/
Signature algorithm	SHA384withECDSA
Extended Validation	No
Certificate Transparency	Yes (certificate, TLS extension)
OCSP Must Staple	No
Revocation information	CRL CRL: http://e7.c.lencr.org/10.crl
Revocation status	Good (not revoked)
DNS CAA	No (more info)
Trusted	Yes Mozilla Apple Android Java Windows

Additional Certificates (if supplied)
Certificates provided	2 (2064 bytes)
Chain issues	None
#2
Subject	E7 Fingerprint SHA256: aeb1fd7410e83bc96f5da3c6a7c2c1bb836d1fa5cb86e708515890e428a8770b Pin SHA256: y7xVm0TVJNahMr2sZydE2jQH8SquXV9yLF9seROHHHU=
Valid until	Fri, 12 Mar 2027 23:59:59 UTC (expires in 1 year)
Key	EC 384 bits
Issuer	ISRG Root X1
Signature algorithm	SHA256withRSA

Certification Paths


Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 3532aaf1953b62145745124c1636062962991e931030173695254db0b8a265b7 Pin SHA256: NUG7g/7r86ZThKNE7Cd9rc/KF2LnSBeD2blSxGHNI7Q= EC 256 bits / SHA384withECDSA
2	Sent by server	E7 Fingerprint SHA256: aeb1fd7410e83bc96f5da3c6a7c2c1bb836d1fa5cb86e708515890e428a8770b Pin SHA256: y7xVm0TVJNahMr2sZydE2jQH8SquXV9yLF9seROHHHU= EC 384 bits / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 3532aaf1953b62145745124c1636062962991e931030173695254db0b8a265b7 Pin SHA256: NUG7g/7r86ZThKNE7Cd9rc/KF2LnSBeD2blSxGHNI7Q= EC 256 bits / SHA384withECDSA
2	Sent by server	E7 Fingerprint SHA256: aeb1fd7410e83bc96f5da3c6a7c2c1bb836d1fa5cb86e708515890e428a8770b Pin SHA256: y7xVm0TVJNahMr2sZydE2jQH8SquXV9yLF9seROHHHU= EC 384 bits / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 3532aaf1953b62145745124c1636062962991e931030173695254db0b8a265b7 Pin SHA256: NUG7g/7r86ZThKNE7Cd9rc/KF2LnSBeD2blSxGHNI7Q= EC 256 bits / SHA384withECDSA
2	Sent by server	E7 Fingerprint SHA256: aeb1fd7410e83bc96f5da3c6a7c2c1bb836d1fa5cb86e708515890e428a8770b Pin SHA256: y7xVm0TVJNahMr2sZydE2jQH8SquXV9yLF9seROHHHU= EC 384 bits / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 3532aaf1953b62145745124c1636062962991e931030173695254db0b8a265b7 Pin SHA256: NUG7g/7r86ZThKNE7Cd9rc/KF2LnSBeD2blSxGHNI7Q= EC 256 bits / SHA384withECDSA
2	Sent by server	E7 Fingerprint SHA256: aeb1fd7410e83bc96f5da3c6a7c2c1bb836d1fa5cb86e708515890e428a8770b Pin SHA256: y7xVm0TVJNahMr2sZydE2jQH8SquXV9yLF9seROHHHU= EC 384 bits / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 3532aaf1953b62145745124c1636062962991e931030173695254db0b8a265b7 Pin SHA256: NUG7g/7r86ZThKNE7Cd9rc/KF2LnSBeD2blSxGHNI7Q= EC 256 bits / SHA384withECDSA
2	Sent by server	E7 Fingerprint SHA256: aeb1fd7410e83bc96f5da3c6a7c2c1bb836d1fa5cb86e708515890e428a8770b Pin SHA256: y7xVm0TVJNahMr2sZydE2jQH8SquXV9yLF9seROHHHU= EC 384 bits / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA

Click here to expand

Certificate #2: RSA 2048 bits (SHA256withRSA)

Server Key and Certificate #1
Subject	twitter.com Fingerprint SHA256: 0eeb42d5f614f3ac7a37adcb2412a27fa691c9413cf272723bc675c20a33ec9a Pin SHA256: UysEaCrJ6LlgC1RopTc98gufN3pUboEClEpu7e985tw=
Common names	twitter.com
Alternative names	*.twitter.com cdn.syndication.twitter.com twitter.com
Serial Number	06c910a6b2065590cb3a88a9921d8a404e6a
Valid from	Sun, 01 Feb 2026 15:29:22 UTC
Valid until	Sat, 02 May 2026 15:29:21 UTC (expires in 2 months and 10 days)
Key	RSA 2048 bits (e 65537)
Weak key (Debian)	No
Issuer	R12 AIA: http://r12.i.lencr.org/
Signature algorithm	SHA256withRSA
Extended Validation	No
Certificate Transparency	Yes (certificate, TLS extension)
OCSP Must Staple	No
Revocation information	CRL CRL: http://r12.c.lencr.org/107.crl
Revocation status	Good (not revoked)
DNS CAA	No (more info)
Trusted	Yes Mozilla Apple Android Java Windows

Additional Certificates (if supplied)
Certificates provided	2 (2605 bytes)
Chain issues	None
#2
Subject	R12 Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ=
Valid until	Fri, 12 Mar 2027 23:59:59 UTC (expires in 1 year)
Key	RSA 2048 bits (e 65537)
Issuer	ISRG Root X1
Signature algorithm	SHA256withRSA

Certification Paths


Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 0eeb42d5f614f3ac7a37adcb2412a27fa691c9413cf272723bc675c20a33ec9a Pin SHA256: UysEaCrJ6LlgC1RopTc98gufN3pUboEClEpu7e985tw= RSA 2048 bits (e 65537) / SHA256withRSA
2	Sent by server	R12 Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ= RSA 2048 bits (e 65537) / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 0eeb42d5f614f3ac7a37adcb2412a27fa691c9413cf272723bc675c20a33ec9a Pin SHA256: UysEaCrJ6LlgC1RopTc98gufN3pUboEClEpu7e985tw= RSA 2048 bits (e 65537) / SHA256withRSA
2	Sent by server	R12 Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ= RSA 2048 bits (e 65537) / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 0eeb42d5f614f3ac7a37adcb2412a27fa691c9413cf272723bc675c20a33ec9a Pin SHA256: UysEaCrJ6LlgC1RopTc98gufN3pUboEClEpu7e985tw= RSA 2048 bits (e 65537) / SHA256withRSA
2	Sent by server	R12 Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ= RSA 2048 bits (e 65537) / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 0eeb42d5f614f3ac7a37adcb2412a27fa691c9413cf272723bc675c20a33ec9a Pin SHA256: UysEaCrJ6LlgC1RopTc98gufN3pUboEClEpu7e985tw= RSA 2048 bits (e 65537) / SHA256withRSA
2	Sent by server	R12 Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ= RSA 2048 bits (e 65537) / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1	Sent by server	twitter.com Fingerprint SHA256: 0eeb42d5f614f3ac7a37adcb2412a27fa691c9413cf272723bc675c20a33ec9a Pin SHA256: UysEaCrJ6LlgC1RopTc98gufN3pUboEClEpu7e985tw= RSA 2048 bits (e 65537) / SHA256withRSA
2	Sent by server	R12 Fingerprint SHA256: 131fce7784016899a5a00203a9efc80f18ebbd75580717edc1553580930836ec Pin SHA256: kZwN96eHtZftBWrOZUsd6cA4es80n3NzSk/XtYz2EqQ= RSA 2048 bits (e 65537) / SHA256withRSA
3	In trust store	ISRG Root X1 Self-signed Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6 Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M= RSA 4096 bits (e 65537) / SHA256withRSA

Click here to expand

Configuration

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

Cipher Suites
# TLS 1.3 (server has no preference)
TLS_AES_128_GCM_SHA256 (`0x1301`) ECDH x25519 (eq. 3072 bits RSA) FS	128
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
# TLS 1.2 (suites in server-preferred order)
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (`0xc02b`) ECDH x25519 (eq. 3072 bits RSA) FS	128
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (`0xc02c`) ECDH x25519 (eq. 3072 bits RSA) FS	256
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 (`0xcca9`) ECDH x25519 (eq. 3072 bits RSA) FS	256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (`0xc02f`) ECDH x25519 (eq. 3072 bits RSA) FS	128
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (`0xc030`) ECDH x25519 (eq. 3072 bits RSA) FS	256
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (`0xcca8`) ECDH x25519 (eq. 3072 bits RSA) FS	256

Handshake Simulation
Android 4.4.2	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Android 5.0.0	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Android 6.0	EC 256 (SHA384)	TLS 1.2 > http/1.1	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Android 7.0	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Android 8.0	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 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
BingPreview Jan 2015	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Chrome 49 / XP SP3	RSA 2048 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Chrome 69 / Win 7 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Chrome 70 / Win 10	-	TLS 1.3	TLS_AES_128_GCM_SHA256 ECDH x25519 FS
Chrome 80 / Win 10 R	-	TLS 1.3	TLS_AES_128_GCM_SHA256 ECDH x25519 FS
Firefox 31.3.0 ESR / Win 7	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Firefox 47 / Win 7 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Firefox 49 / XP SP3	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Firefox 62 / Win 7 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Firefox 73 / Win 10 R	-	TLS 1.3	TLS_AES_128_GCM_SHA256 ECDH x25519 FS
Googlebot Feb 2018	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
IE 11 / Win 7 R	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
IE 11 / Win 8.1 R	EC 256 (SHA384)	TLS 1.2 > http/1.1	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
IE 11 / Win Phone 8.1 R	EC 256 (SHA384)	TLS 1.2 > http/1.1	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
IE 11 / Win Phone 8.1 Update R	EC 256 (SHA384)	TLS 1.2 > http/1.1	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
IE 11 / Win 10 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Edge 15 / Win 10 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Edge 16 / Win 10 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Edge 18 / Win 10 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
Edge 13 / Win Phone 10 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Java 8u161	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Java 11.0.3	-	TLS 1.3	TLS_AES_128_GCM_SHA256 ECDH secp256r1 FS
Java 12.0.1	-	TLS 1.3	TLS_AES_128_GCM_SHA256 ECDH secp256r1 FS
OpenSSL 1.0.1l R	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
OpenSSL 1.0.2s R	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
OpenSSL 1.1.0k R	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH x25519 FS
OpenSSL 1.1.1c R	-	TLS 1.3	TLS_AES_256_GCM_SHA384 ECDH x25519 FS
Safari 6 / iOS 6.0.1	Server sent fatal alert: handshake_failure
Safari 7 / iOS 7.1 R	Server sent fatal alert: handshake_failure
Safari 7 / OS X 10.9 R	Server sent fatal alert: handshake_failure
Safari 8 / iOS 8.4 R	Server sent fatal alert: handshake_failure
Safari 8 / OS X 10.10 R	Server sent fatal alert: handshake_failure
Safari 9 / iOS 9 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Safari 9 / OS X 10.11 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Safari 10 / iOS 10 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Safari 10 / OS X 10.12 R	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 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	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
Yahoo Slurp Jan 2015	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
YandexBot Jan 2015	EC 256 (SHA384)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS
# Not simulated clients (Protocol mismatch)
Android 2.3.7 No SNI ²	Protocol mismatch (not simulated)
Android 4.0.4	Protocol mismatch (not simulated)
Android 4.1.1	Protocol mismatch (not simulated)
Android 4.2.2	Protocol mismatch (not simulated)
Android 4.3	Protocol mismatch (not simulated)
Baidu Jan 2015	Protocol mismatch (not simulated)
IE 6 / XP No FS ¹ No SNI ²	Protocol mismatch (not simulated)
IE 7 / Vista	Protocol mismatch (not simulated)
IE 8 / XP No FS ¹ No SNI ²	Protocol mismatch (not simulated)
IE 8-10 / Win 7 R	Protocol mismatch (not simulated)
IE 10 / Win Phone 8.0	Protocol mismatch (not simulated)
Java 6u45 No SNI ²	Protocol mismatch (not simulated)
Java 7u25	Protocol mismatch (not simulated)
OpenSSL 0.9.8y	Protocol mismatch (not simulated)
Safari 5.1.9 / OS X 10.6.8	Protocol mismatch (not simulated)
Safari 6.0.4 / OS X 10.8.4 R	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	Mitigated server-side (more info)
POODLE (SSLv3)	No, SSL 3 not supported (more info)
POODLE (TLS)	No (more info)
Zombie POODLE	No (more info)
GOLDENDOODLE	No (more info)
OpenSSL 0-Length	No (more info)
Sleeping POODLE	No (more info)
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	Yes (with most browsers) ROBUST (more info)
ALPN	Yes h2 http/1.1
NPN	Yes h2 http/1.1
Session resumption (caching)	No (IDs assigned but not accepted)
Session resumption (tickets)	Yes
OCSP stapling	No
Strict Transport Security (HSTS)	Yes max-age=631138519; includeSubdomains
HSTS Preloading	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	x25519, secp256r1, secp384r1, secp521r1 (server preferred order)
SSL 2 handshake compatibility	No
0-RTT enabled	No

HTTP Requests

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Miscellaneous
Test date	Sat, 21 Feb 2026 23:33:50 UTC
Test duration	44.492 seconds
HTTP status code	301
HTTP forwarding	https://x.com
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Server hostname	-

SSL Report v2.4.1

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