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 (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_CHACHA20_POLY1305_SHA256 (0xcca9)   ECDH x25519 (eq. 3072 bits RSA)   FS	256P
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA (0xc009)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	128
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 (0xc02c)   ECDH x25519 (eq. 3072 bits RSA)   FS	256
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA (0xc00a)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	256
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 (0xc023)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	128
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 (0xc024)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	256
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)   ECDH x25519 (eq. 3072 bits RSA)   FS	128
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 (0xcca8)   ECDH x25519 (eq. 3072 bits RSA)   FS	256P
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	128
TLS_RSA_WITH_AES_128_GCM_SHA256 (0x9c)   WEAK	128
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK	128
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)   ECDH x25519 (eq. 3072 bits RSA)   FS	256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	256
TLS_RSA_WITH_AES_256_GCM_SHA384 (0x9d)   WEAK	256
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK	256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (0xc027)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	128
TLS_RSA_WITH_AES_128_CBC_SHA256 (0x3c)   WEAK	128
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (0xc028)   ECDH x25519 (eq. 3072 bits RSA)   FS   WEAK	256
TLS_RSA_WITH_AES_256_CBC_SHA256 (0x3d)   WEAK	256
(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 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 5.0.0	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 6.0	EC 256 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Android 7.0	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256   ECDH x25519  FS
Android 8.0	EC 256 (SHA256)	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 (SHA256)	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 (SHA256)	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 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 47 / Win 7  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 49 / XP SP3	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Firefox 62 / Win 7  R	EC 256 (SHA256)	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 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH x25519  FS
IE 11 / Win 7  R	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
IE 11 / Win 8.1  R	EC 256 (SHA256)	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 (SHA256)	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 (SHA256)	TLS 1.2 > http/1.1	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
IE 11 / Win 10  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Edge 15 / Win 10  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH x25519  FS
Edge 16 / Win 10  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH x25519  FS
Edge 18 / Win 10  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH x25519  FS
Edge 13 / Win Phone 10  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Java 8u161	EC 256 (SHA256)	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 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
OpenSSL 1.0.2s  R	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
OpenSSL 1.1.0k  R	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_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	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA   ECDH secp256r1  FS
Safari 7 / iOS 7.1  R	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA   ECDH secp256r1  FS
Safari 7 / OS X 10.9  R	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA   ECDH secp256r1  FS
Safari 8 / iOS 8.4  R	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA   ECDH secp256r1  FS
Safari 8 / OS X 10.10  R	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA   ECDH secp256r1  FS
Safari 9 / iOS 9  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Safari 9 / OS X 10.11  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Safari 10 / iOS 10  R	EC 256 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Safari 10 / OS X 10.12  R	EC 256 (SHA256)	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 (SHA256)	TLS 1.2 > h2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
Yahoo Slurp Jan 2015	EC 256 (SHA256)	TLS 1.2	TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256   ECDH secp256r1  FS
YandexBot Jan 2015	EC 256 (SHA256)	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)   TLS 1.2 : 0xc009
GOLDENDOODLE	No (more info)   TLS 1.2 : 0xc009
OpenSSL 0-Length	No (more info)   TLS 1.2 : 0xc009
Sleeping POODLE	No (more info)   TLS 1.2 : 0xc009
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	Yes
Strict Transport Security (HSTS)	Invalid   Failed to parse header max-age=63072000; includeSubDomains; preload, max-age=31536000
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, secp384r1, secp521r1 (server preferred order)
SSL 2 handshake compatibility	Yes
0-RTT enabled	No

HTTP Requests

1 https://duocircle.com/  (HTTP/1.1 301 Moved Permanently)
1
	Date	Sat, 14 Jun 2025 10:26:03 GMT
	Content-Type	text/html; charset=UTF-8
	Transfer-Encoding	chunked
	Connection	close
	Location	https://www.duocircle.com/
	CF-Ray	94f920914fb29e74-SJC
	CF-Cache-Status	DYNAMIC
	Set-Cookie	Path=/; session.cookie_httponly=on; Secure
	Strict-Transport-Security	max-age=63072000; includeSubDomains; preload, max-age=31536000
	access-control-allow-headers	Content-Type, Authorization
	access-control-allow-methods	GET,POST
	content-security-policy	default-src 'self'; script-src 'self' https://www.google.com https://www.gstatic.com https://cdn.iubenda.com https://cs.iubenda.com https://fast.wistia.com https://static.elfsight.com https://www.googletagmanager.com https://www.clarity.ms https://serve.albacross.com https://tracking.g2crowd.com https://i.kissmetrics.io https://scripts.kissmetrics.io https://browser.sentry-cdn.com https://www.google-analytics.com https://s.adroll.com https://ef262.infusionsoft.com https://insight.iljmp.com https://d952cmcgwqsjf.cloudfront.net https://cdn.calltrk.com https://tag.getdrip.com https://connect.facebook.net https://wchat.freshchat.com https://cdn.freshmarketer.com https://static.site24x7rum.eu https://rest.happierleads.com https://salespanel.io https://googleads.g.doubleclick.net https://universe-static.elfsightcdn.com https://data.processwebsitedata.com https://d.adroll.com 'unsafe-inline'; style-src 'self' https://fonts.googleapis.com https://cdn.iubenda.com 'unsafe-inline'; font-src 'self' https://fonts.gstatic.com data:; img-src 'self' data: https://secure.gravatar.com https://embed-ssl.wistia.com https://fast.wistia.com https://c.clarity.ms https://new-collect.albacross.com https://googleads.g.doubleclick.net https://www.google.com https://www.google.md https://www.googleadservices.com https://www.googletagmanager.com https://www.facebook.com https://c.bing.com https://d.adroll.com; connect-src 'self' https://core.service.elfsight.com https://idb.iubenda.com https://pipedream.wistia.com https://distillery.wistia.com https://j.clarity.ms https://rest.happierleads.com https://googleads.g.doubleclick.net https://www.google-analytics.com https://api.salespanel.io https://duo.freshsales.io https://col.site24x7rum.eu https://src.fwusercontent.com https://fast.wistia.com https://static.elfsight.com https://service-reviews-ultimate.elfsight.com https://data.processwebsitedata.com https://cdn.iubenda.com https://www.facebook.com https://www.google.com; frame-src 'self' https://www.google.com/recaptcha/ https://fast.wistia.com https://cdn.iubenda.com https://www.googletagmanager.com https://wchat.freshchat.com; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none';
	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
	ki-cache-type	None
	Ki-CF-Cache-Status	BYPASS
	ki-edge	v=21.0.2;mv=4.2.0
	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
	referrer-policy	strict-origin-when-cross-origin
	x-content-security-policy	default-src 'self'; img-src *; media-src * data:;
	x-content-type-options	nosniff
	X-Edge-Location-Klb	1
	x-frame-options	SAMEORIGIN
	x-frame-options	SAMEORIGIN
	x-kinsta-cache	EXPIRED
	x-permitted-cross-domain-policies	none
	x-redirect-by	WordPress
	x-xss-protection	1; mode=block
	Set-Cookie	__cf_bm=B_nESrlA8GpX_MbznnRAnURMtZJtMPAM2m1qSLwXkFs-1749896763-1.0.1.1-BTmY0Fjo742OPK.TQ8n3XG3kd6LCqjF4DtG1SQGmhITX63v4OpTi9BdVqBX.1_JtXhhfzBnF0Gc0psMy8nHwG7ZyPsunLi7isoany3S5ohE; path=/; expires=Sat, 14-Jun-25 10:56:03 GMT; domain=.duocircle.com; HttpOnly; Secure; SameSite=None
	Report-To	{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=7MOM9XZlSpXcoK1RUPCB1EMfXEwOop1YJYGA4E1T%2F8Sj%2BUWSOXH7LhHyLy2TnT37DE9esedjMJVb%2BqFHybbHggw67N%2F3M0cUZeR0x0dmjBARYke4tSwR37JLDtMDSNE%3D"}],"group":"cf-nel","max_age":604800}
	NEL	{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
	Server	cloudflare
	alt-svc	h3=":443"; ma=86400

Miscellaneous
Test date	Sat, 14 Jun 2025 10:25:57 UTC
Test duration	89.694 seconds
HTTP status code	301
HTTP forwarding	https://www.duocircle.com
HTTP server signature	cloudflare
Server hostname	-