Port 80 — HTTP
Quick reference for TCP/UDP port 80, used by HTTP. Includes what the service does, security guidance and related ports.
What is port 80?
Plain HTTP web traffic.
What port does HTTP use?
HTTP listens on port 80 by default.
Is port 80 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 80
Test-NetConnection HOST -Port 80
nmap -p 80 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 80 (HTTP) is designed for public exposure. Standard hardening (TLS certs, current firmware, sensible rate limits) is enough — no special isolation needed.
Devices that use port 80
12 devices in our database expose a service on port 80.
Related ports
Frequently asked
What is port 80 used for?+
Port 80 is the standard TCP/UDP port for HTTP. Plain HTTP web traffic.
What port does HTTP use?+
HTTP listens on port 80 by default.
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