Administrator Guide

Rate-limiting RADIUS packets
NAS enables you to allow or reject RADIUS dynamic authorization packets based on the rate-limiting value that you specify.
NAS lets you to configure number of RADIUS dynamic authorization packets allowed per minute. The default value is 30 packets
per minute. NAS discards the packets, if the number of RADIUS dynamic authorization packets in the current interval cross the
configured rate-limit value.
Enter the following command to configure rate-limiting:
rate-limit number
NAS considers the rate limit change value from the next interval period. The range is from 10 to 60 packets per minute. The
default is 30 packets per minute.
Dell(conf-dynamic-auth#)rate-limit 50
Configuring time-out value
You can configure a time-out value for the back-end task to respond to CoA or DM requests.
This setting enables the DAS to determine the amount of time to wait before a back-end response is received. The default value
is 10 minutes.
Enter the following command to configure the time-out value:
da-rsp-timeout value
Dell(conf-dynamic-auth#)da-rsp-timeout 20
TACACS+
The system supports terminal access controller access control system (TACACS+ client, including support for login
authentication.
Configuration Task List for TACACS+
The following list includes the configuration task for TACACS+ functions.
● Choosing TACACS+ as the Authentication Method
● Monitoring TACACS+
● TACACS+ Remote Authentication and Authorization
● Specifying a TACACS+ Server Host
For a complete listing of all commands related to TACACS+, refer to the Security chapter in the Dell Networking OS Command
Reference Guide.
Choosing TACACS+ as the Authentication Method
One of the login authentication methods available is TACACS+ and the user’s name and password are sent for authentication to
the TACACS hosts specified.
To use TACACS+ to authenticate users, specify at least one TACACS+ server for the system to communicate with and
configure TACACS+ as one of your authentication methods.
To select TACACS+ as the login authentication method, use the following commands.
1. Configure a TACACS+ server host.
CONFIGURATION mode
tacacs-server host {ip-address | host}
Enter the IP address or host name of the TACACS+ server.
Use this command multiple times to configure multiple TACACS+ server hosts.
Security
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