Port 443 — HTTPS
Quick reference for TCP/UDP port 443, used by HTTPS. Includes what the service does, security guidance and related ports.
Port
443
Protocol
TCP
Service
HTTPS
What is port 443?
HTTP over TLS — the modern default for the web.
What port does HTTPS use?
HTTPS listens on port 443 by default.
Security guidance
Low risk — designed for public exposure
Port 443 (HTTPS) is designed for public exposure. Standard hardening (TLS certs, current firmware, sensible rate limits) is enough — no special isolation needed.
Related ports
Frequently asked
What is port 443 used for?+
Port 443 is the standard TCP/UDP port for HTTPS. HTTP over TLS — the modern default for the web.
What port does HTTPS use?+
HTTPS listens on port 443 by default.
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