##################################################################### testssl.sh version 3.2.3 from https://testssl.sh/ This program is free software. Distribution and modification under GPLv2 permitted. USAGE w/o ANY WARRANTY. USE IT AT YOUR OWN RISK! Please file bugs @ https://testssl.sh/bugs/ ##################################################################### Using OpenSSL 3.6.1 (Jan 27 2026) [~96 ciphers] on colocrossing:/nix/store/2di90l89y2ygdy3rbws7dhg9nrvd3pnx-openssl-3.6.1-bin/bin/openssl Start 2026-05-24 00:17:38 -->> 23.94.65.218:443 (zerossl.lantian.pub) <<-- Further IP addresses: 2001:470:1f07:6fe::1 rDNS (23.94.65.218): colocrossing.lantian.pub. Service detected: HTTP Testing protocols via sockets except NPN+ALPN SSLv2 not offered (OK) SSLv3 not offered (OK) TLS 1 not offered TLS 1.1 not offered TLS 1.2 offered (OK) TLS 1.3 offered (OK): final NPN/SPDY not offered ALPN/HTTP2 h2, http/1.1 (offered) Testing for server implementation bugs No bugs found. Testing cipher categories NULL ciphers (no encryption) not offered (OK) Anonymous NULL Ciphers (no authentication) not offered (OK) Export ciphers (w/o ADH+NULL) not offered (OK) LOW: 64 Bit + DES, RC[2,4], MD5 (w/o export) not offered (OK) Triple DES Ciphers / IDEA not offered Obsoleted CBC ciphers (AES, ARIA etc.) not offered Strong encryption (AEAD ciphers) with no FS not offered Forward Secrecy strong encryption (AEAD ciphers) offered (OK) Testing server's cipher preferences Hexcode Cipher Suite Name (OpenSSL) KeyExch. Encryption Bits Cipher Suite Name (IANA/RFC) ----------------------------------------------------------------------------------------------------------------------------- SSLv2 - SSLv3 - TLSv1 - TLSv1.1 - TLSv1.2 (no server order, thus listed by strength) xc030 ECDHE-RSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 xc02c ECDHE-ECDSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 x9f DHE-RSA-AES256-GCM-SHA384 DH 4096 AESGCM 256 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 xcca9 ECDHE-ECDSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 xcca8 ECDHE-RSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 xccaa DHE-RSA-CHACHA20-POLY1305 DH 4096 ChaCha20 256 TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 xc02f ECDHE-RSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 xc02b ECDHE-ECDSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 x9e DHE-RSA-AES128-GCM-SHA256 DH 4096 AESGCM 128 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 TLSv1.3 (no server order, thus listed by strength) x1302 TLS_AES_256_GCM_SHA384 ECDH/MLKEM AESGCM 256 TLS_AES_256_GCM_SHA384 x1303 TLS_CHACHA20_POLY1305_SHA256 ECDH/MLKEM ChaCha20 256 TLS_CHACHA20_POLY1305_SHA256 x1301 TLS_AES_128_GCM_SHA256 ECDH/MLKEM AESGCM 128 TLS_AES_128_GCM_SHA256 Has server cipher order? no (limited sense as client will pick) Testing robust forward secrecy (FS) -- omitting Null Authentication/Encryption, 3DES, RC4 FS is offered (OK) , ciphers follow (client/browser support is important here) Hexcode Cipher Suite Name (OpenSSL) KeyExch. Encryption Bits Cipher Suite Name (IANA/RFC) ----------------------------------------------------------------------------------------------------------------------------- x1302 TLS_AES_256_GCM_SHA384 ECDH/MLKEM AESGCM 256 TLS_AES_256_GCM_SHA384 x1303 TLS_CHACHA20_POLY1305_SHA256 ECDH/MLKEM ChaCha20 256 TLS_CHACHA20_POLY1305_SHA256 xc030 ECDHE-RSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 xc02c ECDHE-ECDSA-AES256-GCM-SHA384 ECDH 253 AESGCM 256 TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 x9f DHE-RSA-AES256-GCM-SHA384 DH 4096 AESGCM 256 TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 xcca9 ECDHE-ECDSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 xcca8 ECDHE-RSA-CHACHA20-POLY1305 ECDH 253 ChaCha20 256 TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 xccaa DHE-RSA-CHACHA20-POLY1305 DH 4096 ChaCha20 256 TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 x1301 TLS_AES_128_GCM_SHA256 ECDH/MLKEM AESGCM 128 TLS_AES_128_GCM_SHA256 xc02f ECDHE-RSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 xc02b ECDHE-ECDSA-AES128-GCM-SHA256 ECDH 253 AESGCM 128 TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 x9e DHE-RSA-AES128-GCM-SHA256 DH 4096 AESGCM 128 TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 KEMs offered SecP256r1MLKEM768 X25519MLKEM768 Elliptic curves offered: prime256v1 secp384r1 X25519 DH group offered: Unknown DH group (4096 bits) TLS 1.2 sig_algs offered: RSA-PSS-RSAE+SHA512 RSA-PSS-RSAE+SHA384 RSA-PSS-RSAE+SHA256 RSA+SHA512 RSA+SHA384 RSA+SHA256 RSA+SHA224 ECDSA+SHA512 ECDSA+SHA384 ECDSA+SHA256 ECDSA+SHA224 TLS 1.3 sig_algs offered: ECDSA+SHA384 RSA-PSS-RSAE+SHA512 RSA-PSS-RSAE+SHA384 RSA-PSS-RSAE+SHA256 Testing server defaults (Server Hello) TLS extensions (standard) "server name/#0" "max fragment length/#1" "supported_groups/#10" "EC point formats/#11" "application layer protocol negotiation/#16" "extended master secret/#23" "session ticket/#35" "early_data/#42" "supported versions/#43" "key share/#51" "renegotiation info/#65281" Session Ticket RFC 5077 hint 86400 seconds, session tickets keys seems to be rotated < daily SSL Session ID support yes Session Resumption Connect problem: Ticket resumption test not possible / ID: no TLS clock skew Random values, no fingerprinting possible Certificate Compression none Client Authentication none Server Certificate #1 Signature Algorithm SHA384 with RSA Server key size RSA 4096 bits (exponent is 65537) Server key usage Digital Signature, Key Encipherment Server extended key usage TLS Web Server Authentication Serial B177062687AC9DF2B0583BF091B75CC2 (OK: length 16) Fingerprints SHA1 EACD99152C939C7F8FF96EB790737CD46015CF06 SHA256 DE353D160FFC83072CD38B6E8A3884D45BDC4BFB3A483179B9E9483F6FFE5D13 Common Name (CN) zerossl.lantian.pub (CN in response to request w/o SNI: 127.0.0.1 ) subjectAltName (SAN) zerossl.lantian.pub Trust (hostname) Ok via SAN and CN (SNI mandatory) Chain of trust Ok EV cert (experimental) no Certificate Validity (UTC) expires < 60 days (31) (2026-03-26 00:00 --> 2026-06-24 23:59) ETS/"eTLS", visibility info not present Certificate Revocation List -- OCSP URI http://zerossl.ocsp.sectigo.com OCSP stapling not offered OCSP must staple extension -- DNS CAA RR (experimental) available - please check for match with "Issuer" below =, iodef=mailto:b980120@hotmail.com, issue=letsencrypt.org, issue=pki.goog;, issue=sectigo.com, issuewild=letsencrypt.org, issuewild=pki.goog;, issuewild=sectigo.com Certificate Transparency yes (certificate extension) Certificates provided 3 Issuer ZeroSSL RSA Domain Secure Site CA (ZeroSSL from AT) Intermediate cert validity #1: ok > 40 days (2030-01-29 23:59). ZeroSSL RSA Domain Secure Site CA <-- USERTrust RSA Certification Authority #2: ok > 40 days (2028-12-31 23:59). USERTrust RSA Certification Authority <-- AAA Certificate Services Intermediate Bad OCSP (exp.) Ok Server Certificate #2 Signature Algorithm ECDSA with SHA384 Server key size EC 384 bits (curve P-384) Server key usage Digital Signature Server extended key usage TLS Web Server Authentication Serial 7F86E0610950171558BB921B16544DE3 (OK: length 16) Fingerprints SHA1 EA6F271C7EB6300EAE43E83B7E9A6846428B04A2 SHA256 19C3FC3FAA0A0CBE7024BA228ECFE23947AF88ACD541A61965FA31720DB5E551 Common Name (CN) zerossl.lantian.pub (CN in response to request w/o SNI: 127.0.0.1 ) subjectAltName (SAN) zerossl.lantian.pub Trust (hostname) Ok via SAN and CN (SNI mandatory) Chain of trust Ok EV cert (experimental) no Certificate Validity (UTC) expires < 60 days (32) (2026-03-27 00:00 --> 2026-06-25 23:59) ETS/"eTLS", visibility info not present Certificate Revocation List -- OCSP URI http://zerossl.ocsp.sectigo.com OCSP stapling not offered OCSP must staple extension -- DNS CAA RR (experimental) available - please check for match with "Issuer" below =, iodef=mailto:b980120@hotmail.com, issue=letsencrypt.org, issue=pki.goog;, issue=sectigo.com, issuewild=letsencrypt.org, issuewild=pki.goog;, issuewild=sectigo.com Certificate Transparency yes (certificate extension) Certificates provided 3 Issuer ZeroSSL ECC Domain Secure Site CA (ZeroSSL from AT) Intermediate cert validity #1: ok > 40 days (2030-01-29 23:59). ZeroSSL ECC Domain Secure Site CA <-- USERTrust ECC Certification Authority #2: ok > 40 days (2028-12-31 23:59). USERTrust ECC Certification Authority <-- AAA Certificate Services Intermediate Bad OCSP (exp.) Ok Testing HTTP header response @ "/" HTTP Status Code 200 OK HTTP clock skew 0 sec from localtime Strict Transport Security 365 days=31536000 s, includeSubDomains, preload Public Key Pinning -- Server banner lantian/colocrossing' Application banner -- Cookie(s) (none issued at "/") Security headers X-Frame-Options: SAMEORIGIN X-Content-Type-Options: nosniff Permissions-Policy: interest-cohort=() X-XSS-Protection: 1; mode=block Permissions-Policy: interest-cohort=() Referrer-Policy: strict-origin-when-cross-origin Cache-Control: private Reverse Proxy banner -- Testing vulnerabilities Heartbleed (CVE-2014-0160) not vulnerable (OK), no heartbeat extension CCS (CVE-2014-0224) not vulnerable (OK) Ticketbleed (CVE-2016-9244), experiment. not vulnerable (OK) ROBOT Server does not support any cipher suites that use RSA key transport Secure Renegotiation (RFC 5746) supported (OK) Secure Client-Initiated Renegotiation not vulnerable (OK) CRIME, TLS (CVE-2012-4929) not vulnerable (OK) BREACH (CVE-2013-3587) potentially NOT ok, "br gzip" HTTP compression detected. - only supplied "/" tested Can be ignored for static pages or if no secrets in the page POODLE, SSL (CVE-2014-3566) not vulnerable (OK), no SSLv3 support TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered SWEET32 (CVE-2016-2183, CVE-2016-6329) not vulnerable (OK) FREAK (CVE-2015-0204) not vulnerable (OK) DROWN (CVE-2016-0800, CVE-2016-0703) not vulnerable on this host and port (OK) make sure you don't use this certificate elsewhere with SSLv2 enabled services, see https://search.censys.io/search?resource=hosts&virtual_hosts=INCLUDE&q=DE353D160FFC83072CD38B6E8A3884D45BDC4BFB3A483179B9E9483F6FFE5D13 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no common prime detected BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK) Winshock (CVE-2014-6321), experimental not vulnerable (OK) RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK) Running client simulations (HTTP) via sockets Browser Protocol Cipher Suite Name (OpenSSL) Forward Secrecy ------------------------------------------------------------------------------------------------ Android 7.0 (native) TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256 256 bit ECDH (P-256) Android 8.1 (native) TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256 253 bit ECDH (X25519) Android 9.0 (native) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Android 10.0 (native) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Android 11/12 (native) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Android 13/14 (native) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Android 15 (native) TLSv1.3 TLS_AES_128_GCM_SHA256 X25519MLKEM768 Chrome 101 (Win 10) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Chromium 137 (Win 11) TLSv1.3 TLS_AES_128_GCM_SHA256 X25519MLKEM768 Firefox 100 (Win 10) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Firefox 137 (Win 11) TLSv1.3 TLS_AES_128_GCM_SHA256 X25519MLKEM768 IE 8 Win 7 No connection IE 11 Win 7 TLSv1.2 DHE-RSA-AES256-GCM-SHA384 4096 bit DH IE 11 Win 8.1 TLSv1.2 DHE-RSA-AES256-GCM-SHA384 4096 bit DH IE 11 Win Phone 8.1 TLSv1.2 ECDHE-ECDSA-AES128-GCM-SHA256 256 bit ECDH (P-256) IE 11 Win 10 TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384 256 bit ECDH (P-256) Edge 15 Win 10 TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384 253 bit ECDH (X25519) Edge 101 Win 10 21H2 TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Edge 133 Win 11 23H2 TLSv1.3 TLS_AES_128_GCM_SHA256 X25519MLKEM768 Safari 18.4 (iOS 18.4) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Safari 15.4 (macOS 12.3.1) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Safari 18.4 (macOS 15.4) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Java 7u25 No connection Java 8u442 (OpenJDK) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519) Java 11.0.2 (OpenJDK) TLSv1.3 TLS_AES_128_GCM_SHA256 256 bit ECDH (P-256) Java 17.0.3 (OpenJDK) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519) Java 21.0.6 (OpenJDK) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519) go 1.17.8 TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) LibreSSL 3.3.6 (macOS) TLSv1.3 TLS_CHACHA20_POLY1305_SHA256 253 bit ECDH (X25519) OpenSSL 1.0.2e TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256) OpenSSL 1.1.1d (Debian) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519) OpenSSL 3.0.15 (Debian) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519) OpenSSL 3.5.0 (git) TLSv1.3 TLS_AES_256_GCM_SHA384 X25519MLKEM768 Apple Mail (16.0) TLSv1.2 ECDHE-ECDSA-AES256-GCM-SHA384 256 bit ECDH (P-256) Thunderbird (91.9) TLSv1.3 TLS_AES_128_GCM_SHA256 253 bit ECDH (X25519) Rating (experimental) Rating specs (not complete) SSL Labs's 'SSL Server Rating Guide' (version 2009r from 2025-05-16) Specification documentation https://github.com/ssllabs/research/wiki/SSL-Server-Rating-Guide Protocol Support (weighted) 100 (30) Key Exchange (weighted) 100 (30) Cipher Strength (weighted) 90 (36) Final Score 96 Overall Grade A+ Done 2026-05-24 00:19:00 [ 84s] -->> 23.94.65.218:443 (zerossl.lantian.pub) <<--