Port 8443 — HTTPS alt
Quick reference for TCP/UDP port 8443, used by HTTPS alt. Includes what the service does, security guidance and related ports.
What is port 8443?
HTTPS alt — common for self-hosted dashboards.
What port does HTTPS alt use?
HTTPS alt listens on port 8443 by default.
Is port 8443 open? How to check
Run one of these from your computer, replacing HOST with the IP address or domain you want to test.
nc -zv HOST 8443
Test-NetConnection HOST -Port 8443
nmap -p 8443 HOST
A refused or timed-out connection means the port is closed or filtered by a firewall.
Security guidance
Low risk — designed for public exposure
Port 8443 (HTTPS alt) 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 8443 used for?+
Port 8443 is the standard TCP/UDP port for HTTPS alt. HTTPS alt — common for self-hosted dashboards.
What port does HTTPS alt use?+
HTTPS alt listens on port 8443 by default.
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