Port 8888 · HTTP Alt / Jupyter

Port 8888 is HTTP Alt / Jupyter, TCP.

Common HTTP alternative port — Jupyter Notebook default, Artifactory, and many others. Jupyter without auth = arbitrary code execution.

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-8888 protocol tcp port 8888

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application web-browsing service tcp-8888 action allow

Risk and exposure

Rated high risk. Services on this port are commonly targeted by attackers. Keep it off the internet, or put it behind a VPN or a strict source allow-list, and monitor access.

Check it

• Linux ss -tlnp | grep :8888
• PowerShell Test-NetConnection <host> -Port 8888
• nmap nmap -p 8888 <host>

Related ports

• 8080 HTTP Alternate
• 8443 HTTPS Alternate
• 80 HTTP
• 593 MS-RPC over HTTP
• 3128 HTTP Proxy
• 5984 CouchDB

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