Port 80 · HTTP

Port 80 is HTTP, TCP.

Hypertext Transfer Protocol — unencrypted web traffic. Sites often redirect it to HTTPS on 443; cleartext content and credentials can be read on the wire.

Palo Alto

Create the service object for this port, then allow the App-ID on it. Restricting the rule to the port's service object keeps the rule working on a non-default port and stops the App-ID matching on other ports. Replace the placeholders with your own rule name and zones.

set service tcp-80 protocol tcp port 80

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application web-browsing service tcp-80 action allow

Risk and exposure

Rated medium risk. Restrict this port to the sources that need it and keep the service patched; avoid exposing it to the whole internet unless the service is meant to be public.

Check it

• Linux ss -tlnp | grep :80
• PowerShell Test-NetConnection <host> -Port 80
• nmap nmap -p 80 <host>

Related ports

• 8080 HTTP Alternate
• 443 HTTPS
• 593 MS-RPC over HTTP
• 3128 HTTP Proxy
• 1434 SQL Server Browser
• 8443 HTTPS Alternate

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