Deep SSL/TLS Vulnerability Test
This report provides a deep analysis of the SSL/TLS configuration of developer.mozilla.org. It checks for protocol support, cipher strength, and known vulnerabilities.
Scan Results
Testing all IP addresses (port 443): 151.101.129.91 151.101.1.91 151.101.65.91 151.101.193.91 ----------------------------------------------------- Start 2026-08-17 13:27:58 -->> 151.101.129.91:443 (developer.mozilla.org) <<-- Further IP addresses: 151.101.193.91 151.101.1.91 151.101.65.91 2a04:4e42:400::347 2a04:4e42:600::347 2a04:4e42::347 2a04:4e42:200::347 rDNS (151.101.129.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 302 Found, redirecting to "" HTTP clock skew +1999 sec from localtime HTTP Age (RFC 7234) 1999 Strict Transport Security not offered Public Key Pinning -- Server banner Google Frontend Application banner -- Cookie(s) (none issued at "/") -- maybe better try target URL of 30x Security headers X-Served-By: cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400040-BFI, cache-chi-klot8100078-CHI Cache-Control: max-age=3600,public Reverse Proxy banner via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish X-Cache: MISS, HIT, HIT X-Cache-Hits: 0, 9, 1 Testing vulnerabilities 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) no gzip/deflate/compress/br HTTP compression (OK) - only supplied "/" tested POODLE, SSL (CVE-2014-3566) not vulnerable (OK) 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=378CC45EB8A3C44F453960F98F2BC38557CA92118FE9BF34CC47BF29B6C8239B LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 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) Done 2026-08-17 13:28:37 [ 47s] -->> 151.101.129.91:443 (developer.mozilla.org) <<-- ----------------------------------------------------- Start 2026-08-17 13:28:38 -->> 151.101.1.91:443 (developer.mozilla.org) <<-- Further IP addresses: 151.101.193.91 151.101.129.91 151.101.65.91 2a04:4e42:400::347 2a04:4e42:600::347 2a04:4e42::347 2a04:4e42:200::347 rDNS (151.101.1.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 302 Found, redirecting to "" HTTP clock skew +2048 sec from localtime HTTP Age (RFC 7234) 2048 Strict Transport Security not offered Public Key Pinning -- Server banner Google Frontend Application banner -- Cookie(s) (none issued at "/") -- maybe better try target URL of 30x Security headers X-Served-By: cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400040-BFI, cache-chi-kigq8000136-CHI Cache-Control: max-age=3600,public Reverse Proxy banner via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish X-Cache: MISS, HIT, HIT X-Cache-Hits: 0, 9, 1 Testing vulnerabilities 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) no gzip/deflate/compress/br HTTP compression (OK) - only supplied "/" tested POODLE, SSL (CVE-2014-3566) not vulnerable (OK) 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=378CC45EB8A3C44F453960F98F2BC38557CA92118FE9BF34CC47BF29B6C8239B LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 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) Done 2026-08-17 13:29:28 [ 98s] -->> 151.101.1.91:443 (developer.mozilla.org) <<-- ----------------------------------------------------- Start 2026-08-17 13:29:28 -->> 151.101.65.91:443 (developer.mozilla.org) <<-- Further IP addresses: 151.101.193.91 151.101.129.91 151.101.1.91 2a04:4e42:400::347 2a04:4e42:600::347 2a04:4e42::347 2a04:4e42:200::347 rDNS (151.101.65.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 302 Found, redirecting to "" HTTP clock skew +2099 sec from localtime HTTP Age (RFC 7234) 2099 Strict Transport Security not offered Public Key Pinning -- Server banner Google Frontend Application banner -- Cookie(s) (none issued at "/") -- maybe better try target URL of 30x Security headers X-Served-By: cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400040-BFI, cache-chi-klot8100080-CHI Cache-Control: max-age=3600,public Reverse Proxy banner via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish X-Cache: MISS, HIT, HIT X-Cache-Hits: 0, 9, 1 Testing vulnerabilities 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) no gzip/deflate/compress/br HTTP compression (OK) - only supplied "/" tested POODLE, SSL (CVE-2014-3566) not vulnerable (OK) 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=378CC45EB8A3C44F453960F98F2BC38557CA92118FE9BF34CC47BF29B6C8239B LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 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) Done 2026-08-17 13:30:18 [ 148s] -->> 151.101.65.91:443 (developer.mozilla.org) <<-- ----------------------------------------------------- Start 2026-08-17 13:30:18 -->> 151.101.193.91:443 (developer.mozilla.org) <<-- Further IP addresses: 151.101.129.91 151.101.1.91 151.101.65.91 2a04:4e42:400::347 2a04:4e42:600::347 2a04:4e42::347 2a04:4e42:200::347 rDNS (151.101.193.91): -- Service detected: HTTP Testing for server implementation bugs No bugs found. Testing HTTP header response @ "/" HTTP Status Code 302 Found, redirecting to "" HTTP clock skew +2138 sec from localtime HTTP Age (RFC 7234) 2138 Strict Transport Security not offered Public Key Pinning -- Server banner Google Frontend Application banner -- Cookie(s) (none issued at "/") -- maybe better try target URL of 30x Security headers X-Served-By: cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400053-BFI, cache-bfi-kbfi7400040-BFI, cache-chi-klot8100134-CHI Cache-Control: max-age=3600,public Reverse Proxy banner via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish X-Cache: MISS, HIT, HIT X-Cache-Hits: 0, 9, 1 Testing vulnerabilities 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) no gzip/deflate/compress/br HTTP compression (OK) - only supplied "/" tested POODLE, SSL (CVE-2014-3566) not vulnerable (OK) 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=378CC45EB8A3C44F453960F98F2BC38557CA92118FE9BF34CC47BF29B6C8239B LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2 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) Done 2026-08-17 13:30:58 [ 188s] -->> 151.101.193.91:443 (developer.mozilla.org) <<-- ----------------------------------------------------- Done testing now all IP addresses (on port 443): 151.101.129.91 151.101.1.91 151.101.65.91 151.101.193.91
About this Scan
This scan uses testssl.sh to check for:
- Protocols: SSLv2, SSLv3, TLS 1.0, TLS 1.1, TLS 1.2, TLS 1.3
- Vulnerabilities: Heartbleed, POODLE, FREAK, Logjam, DROWN, etc.
- Cipher Suites: Weak ciphers, perfect forward secrecy (PFS) support.