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_CHACHA20_POLY1305_SHA256 (0x1303)   ECDH x25519 (eq. 3072 bits RSA)   FS	256
TLS_AES_256_GCM_SHA384 (0x1302)   ECDH x25519 (eq. 3072 bits RSA)   FS	256
TLS_AES_128_GCM_SHA256 (0x1301)   ECDH x25519 (eq. 3072 bits RSA)   FS	128
# TLS 1.2 (suites in server-preferred order)
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8)   ECDH x25519 (eq. 3072 bits RSA)   FS	256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)   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_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xccaa)   DH 3072 bits   FS	256
TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 (0x9f)   DH 3072 bits   FS	256
TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 (0x9e)   DH 3072 bits   FS	128

Handshake Simulation
Android 4.4.2	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Android 5.0.0	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp521r1  FS
Android 6.0	RSA 3072 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp384r1  FS
Android 7.0	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Android 8.0	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_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	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Chrome 49 / XP SP3	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH secp384r1  FS
Chrome 69 / Win 7  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Chrome 70 / Win 10	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Chrome 80 / Win 10  R	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Firefox 31.3.0 ESR / Win 7	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256   ECDH secp521r1  FS
Firefox 47 / Win 7  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH secp521r1  FS
Firefox 49 / XP SP3	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH secp521r1  FS
Firefox 62 / Win 7  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Firefox 73 / Win 10  R	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Googlebot Feb 2018	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
IE 11 / Win 7  R	RSA 3072 (SHA256)	TLS 1.2	TLS_DHE_RSA_WITH_AES_256_GCM_SHA384   DH 3072  FS
IE 11 / Win 8.1  R	RSA 3072 (SHA256)	TLS 1.2 > http/1.1	TLS_DHE_RSA_WITH_AES_256_GCM_SHA384   DH 3072  FS
IE 11 / Win Phone 8.1  R	Server sent fatal alert: handshake_failure
IE 11 / Win Phone 8.1 Update  R	RSA 3072 (SHA256)	TLS 1.2 > http/1.1	TLS_DHE_RSA_WITH_AES_256_GCM_SHA384   DH 3072  FS
IE 11 / Win 10  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp384r1  FS
Edge 15 / Win 10  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Edge 16 / Win 10  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Edge 18 / Win 10  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH x25519  FS
Edge 13 / Win Phone 10  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp384r1  FS
Java 8u161	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Java 11.0.3	-	TLS 1.3	TLS_AES_256_GCM_SHA384   ECDH secp256r1  FS
Java 12.0.1	-	TLS 1.3	TLS_CHACHA20_POLY1305_SHA256   ECDH secp256r1  FS
OpenSSL 1.0.1l  R	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
OpenSSL 1.0.2s  R	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
OpenSSL 1.1.0k  R	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
OpenSSL 1.1.1c  R	-	TLS 1.3	TLS_CHACHA20_POLY1305_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	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Safari 9 / OS X 10.11  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Safari 10 / iOS 10  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Safari 10 / OS X 10.12  R	RSA 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  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 3072 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  FS
Yahoo Slurp Jan 2015	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp384r1  FS
YandexBot Jan 2015	RSA 3072 (SHA256)	TLS 1.2	TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384   ECDH secp521r1  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	Yes
Strict Transport Security (HSTS)	Invalid   Server provided more than one HSTS header
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
DH public server param (Ys) reuse	No
ECDH public server param reuse	No
Supported Named Groups	x448, x25519, secp521r1, secp384r1, secp256r1 (server preferred order)
SSL 2 handshake compatibility	No
0-RTT enabled	No

HTTP Requests

1 https://gutmann.de/  (HTTP/1.1 200 OK)
1
	Date	Thu, 30 Oct 2025 08:59:22 GMT
	Server	Apache
	X-Pingback	https://gutmann.de/xmlrpc.php
	Access-Control-Allow-Methods	GET,POST
	Access-Control-Allow-Headers	Content-Type, Authorization
	Content-Security-Policy	upgrade-insecure-requests;
	Cross-Origin-Embedder-Policy	unsafe-none; report-to='default'
	Cross-Origin-Embedder-Policy-Report-Only	unsafe-none; report-to='default'
	Cross-Origin-Opener-Policy	unsafe-none
	Cross-Origin-Opener-Policy-Report-Only	unsafe-none; report-to='default'
	Cross-Origin-Resource-Policy	cross-origin
	Permissions-Policy	accelerometer=(), autoplay=(), camera=(), cross-origin-isolated=(), display-capture=(self), encrypted-media=(), fullscreen=*, geolocation=(self), gyroscope=(), keyboard-map=(), magnetometer=(), microphone=(), midi=(), payment=*, picture-in-picture=*, publickey-credentials-get=(), screen-wake-lock=(), sync-xhr=*, usb=(), xr-spatial-tracking=(), gamepad=(), serial=()
	Referrer-Policy	strict-origin-when-cross-origin
	Strict-Transport-Security	max-age=63072000
	X-Content-Security-Policy	default-src 'self'; img-src *; media-src * data:;
	X-Content-Type-Options	nosniff
	X-Frame-Options	SAMEORIGIN
	X-Permitted-Cross-Domain-Policies	none
	Link	<https://gutmann.de/wp-json/>; rel="https://api.w.org/", <https://gutmann.de/wp-json/wp/v2/pages/7>; rel="alternate"; title="JSON"; type="application/json", <https://gutmann.de/>; rel=shortlink
	Upgrade	h2
	Connection	Upgrade, close
	Access-Control-Allow-Methods	GET,POST
	Access-Control-Allow-Headers	Content-Type, Authorization
	Content-Security-Policy	upgrade-insecure-requests;
	Cross-Origin-Embedder-Policy	unsafe-none; report-to='default'
	Cross-Origin-Embedder-Policy-Report-Only	unsafe-none; report-to='default'
	Cross-Origin-Opener-Policy	unsafe-none
	Cross-Origin-Opener-Policy-Report-Only	unsafe-none; report-to='default'
	Cross-Origin-Resource-Policy	cross-origin
	Permissions-Policy	accelerometer=(), autoplay=(), camera=(), cross-origin-isolated=(), display-capture=(self), encrypted-media=(), fullscreen=*, geolocation=(self), gyroscope=(), keyboard-map=(), magnetometer=(), microphone=(), midi=(), payment=*, picture-in-picture=*, publickey-credentials-get=(), screen-wake-lock=(), sync-xhr=*, usb=(), xr-spatial-tracking=(), gamepad=(), serial=()
	Referrer-Policy	strict-origin-when-cross-origin
	Strict-Transport-Security	max-age=63072000
	X-Content-Security-Policy	default-src 'self'; img-src *; media-src * data:;
	X-Content-Type-Options	nosniff
	X-Frame-Options	SAMEORIGIN
	X-Permitted-Cross-Domain-Policies	none
	Transfer-Encoding	chunked
	Content-Type	text/html; charset=UTF-8

Miscellaneous
Test date	Thu, 30 Oct 2025 08:59:10 UTC
Test duration	77.667 seconds
HTTP status code	200
HTTP server signature	Apache
Server hostname	dedi1904.your-server.de