Port 8443: HTTPS-alt
Port 8443 is a common alternate HTTPS port for admin consoles and app servers. It runs TLS like port 443 but avoids the privileged sub-1024 range.
TCPWeb EncryptedIANA assigned
| Port number | 8443 |
|---|---|
| Service | Alternate HTTPS |
| Protocol | TCP |
| Category | Web |
| Default encryption | Yes (TLS/SSH) |
Frequently asked questions
What is port 8443 used for?
Port 8443 is a common alternate HTTPS port for admin consoles and app servers. It runs TLS like port 443 but avoids the privileged sub-1024 range.
Is port 8443 TCP or UDP?
Port 8443 (HTTPS-alt) uses TCP.
Is port 8443 secure?
Yes. Port 8443 carries encrypted traffic by default, so data in transit is protected.
Should I open port 8443 on my firewall?
Only if you specifically need HTTPS-alt. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.