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Reliable open port testing for modern engineers

HTTPS

Master HTTPS 443 operations

Keep certificates fresh, enforce TLS policies, and monitor trust signals.

Default port
443
Protocol
TCP
Primary use
Encrypted web and API traffic

Why HTTPS 443 matters

Browsers expect encrypted delivery on port 443; outages or weak ciphers break user confidence.

  • Immediate actions

    Automate renewals and enforce HSTS to avoid expired or mixed-content warnings.

  • Operational guardrails

    Run global health checks and CDN integrations so APIs and mobile apps stay reachable.

HTTPS 443 port guide