Protocols
TLS 1.3	Yes
TLS 1.2	Yes*
TLS 1.1	No
TLS 1.0	No
SSL 3	No
SSL 2	No
(*) Experimental: Server negotiated using No-SNI

Cipher Suites
# TLS 1.3 (suites in server-preferred order)
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	256P
# 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	256P
(P) This server prefers ChaCha20 suites with clients that don't have AES-NI (e.g., Android devices)

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_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Android 8.0	EC 256 (SHA384)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_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	Server sent fatal alert: handshake_failure
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_128_GCM_SHA256   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	No
Session resumption (caching)	Yes
Session resumption (tickets)	No
OCSP stapling	No
Strict Transport Security (HSTS)	Yes max-age=63072000
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	x25519, secp256r1 (server preferred order)
SSL 2 handshake compatibility	No
0-RTT enabled	No

HTTP Requests

1 https://gitlab.dev.keep-calm.ru/  (HTTP/1.1 302 Found)
1
	server	nginx
	date	Sun, 08 Jun 2025 16:35:04 GMT
	content-type	text/html; charset=utf-8
	transfer-encoding	chunked
	cache-control	no-cache
	content-security-policy
	location	https://gitlab.dev.keep-calm.ru/users/sign_in
	permissions-policy	interest-cohort=()
	x-content-type-options	nosniff
	x-download-options	noopen
	x-frame-options	SAMEORIGIN
	x-gitlab-meta	{"correlation_id":"01JX86AJJA5PTQ7X2AWGX8FCJK","version":"1"}
	x-permitted-cross-domain-policies	none
	x-request-id	01JX86AJJA5PTQ7X2AWGX8FCJK
	x-runtime	0.010705
	x-ua-compatible	IE=edge
	x-xss-protection	1; mode=block
	strict-transport-security	max-age=63072000
	referrer-policy	strict-origin-when-cross-origin
	connection	close

2 https://gitlab.dev.keep-calm.ru/users/sign_in  (HTTP/1.1 200 OK)
2
	server	nginx
	date	Sun, 08 Jun 2025 16:35:05 GMT
	content-type	text/html; charset=utf-8
	content-length	10766
	vary	Accept-Encoding
	cache-control	max-age=0, private, must-revalidate
	content-security-policy
	etag	W/"0c5f6ed92d400649be043a0a2d80eb99"
	permissions-policy	interest-cohort=()
	set-cookie	preferred_language=en; path=/; Secure; SameSite=None
	set-cookie	_gitlab_session=fb9b62d947f1375d596e574086764f53; path=/; expires=Sun, 08 Jun 2025 18:35:05 GMT; secure; HttpOnly; SameSite=None
	vary	Accept
	x-content-type-options	nosniff
	x-download-options	noopen
	x-frame-options	SAMEORIGIN
	x-gitlab-meta	{"correlation_id":"01JX86AKA84QS1V0DBFDWSFXAN","version":"1"}
	x-permitted-cross-domain-policies	none
	x-request-id	01JX86AKA84QS1V0DBFDWSFXAN
	x-runtime	0.022560
	x-ua-compatible	IE=edge
	x-xss-protection	1; mode=block
	strict-transport-security	max-age=63072000
	referrer-policy	strict-origin-when-cross-origin
	connection	close

Miscellaneous
Test date	Sun, 08 Jun 2025 16:34:08 UTC
Test duration	85.992 seconds
HTTP status code	200
HTTP server signature	nginx
Server hostname	dedic.keep-calm.ru