PORT 443 TLS INSPECTION
HTTPS Security & TLS Checker
Verify HTTPS availability, active TLS protocol versions, and cryptographic ciphers.
Modern HTTPS & TLS Standards
HTTPS encrypts the communication channel between client web browsers and your origin server using the Transport Layer Security (TLS) protocol.
TLS 1.3 Standard
0-RTT & Fast Handshakes
TLS 1.3 reduces handshake latency from two round-trips to one (or zero via 0-RTT) while removing obsolete and vulnerable ciphers (such as RC4, 3DES, and CBC mode).
ALPN Support
HTTP/2 & HTTP/3 Protocol
Application-Layer Protocol Negotiation (ALPN) allows client and server to negotiate modern multiplexed protocols like HTTP/2 (h2) and HTTP/3 over QUIC during TLS setup.
HSTS Best Practice
HTTP Strict Transport Security
HSTS headers instruct browsers to automatically upgrade all HTTP requests to HTTPS, protecting against SSL stripping attacks and man-in-the-middle exploits.