Port 80

Q: What is port 80?

Unencrypted web traffic (HTTP) HTTP on port 80 is the foundational protocol of the web. When you type a URL without https://, the browser connects on port 80. Today, port 80 is primarily used to issue 301 redirects to HTTPS (port 443) and to serve ACME HTTP-01 challenges for Let's Encrypt certificate issuance. All communication is unencrypted, so passwords and sensitive data are visible on the network. Production systems should always serve content over HTTPS.

HTTP

Unencrypted web traffic (HTTP)

Port

Protocol

TCP

Service

HTTP

Security

Safe

Full name: HyperText Transfer Protocol

What is port 80?

HTTP on port 80 is the foundational protocol of the web. When you type a URL without https://, the browser connects on port 80. Today, port 80 is primarily used to issue 301 redirects to HTTPS (port 443) and to serve ACME HTTP-01 challenges for Let's Encrypt certificate issuance. All communication is unencrypted, so passwords and sensitive data are visible on the network. Production systems should always serve content over HTTPS.

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