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Port

Port 1813

Conventionally used by RADIUS. Port assignments are conventions, so confirm the actual listener before you write a rule around this number.

UDPEncrypted: Optional

Protocols on this port

RADIUS

Network authentication and accounting

Security: Use RadSec or IPsec; shared secrets must be strong and unique

UDP · Encrypted: Optional

Where this port appears in the documentation

Network Access Control

Authenticating and authorising devices before granting network access, typically with 802.1X and dynamic VLAN or ACL assignment.

Exposure guidance

Decide reachability from the identity of the caller, not from the port number. If the service on this port carries credentials or administrative control, restrict it to an administrative network, require strong authentication, and log every session that reaches it.

Nearby ports

Port 1812Port 3268

In the knowledge graph

Open the interactive map centred on this entity to see everything it connects to and travel outwards from there.

Explore port 1813 in the knowledge graph