Port 1813 · RADIUS Accounting

Port 1813 is RADIUS Accounting, UDP.

RADIUS accounting — logs session start, stop, and interim records for auditing and billing.

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 udp-1813 protocol udp port 1813

set rulebase security rules <rule-name> from <from-zone> to <to-zone> source any destination any application radius service udp-1813 action allow

Risk and exposure

Rated low risk. Even so, only expose this port to the networks and hosts that need it, and keep it patched.

Check it

• Linux ss -ulnp | grep :1813
• nmap nmap -sU -p 1813 <host>

Related ports

• 1812 RADIUS Auth
• 6379 Redis
• 49 TACACS+

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