Administrator Guide

Configuring replay protection
NAS enables you to configure the replay protection window period.
NAS drops the packets if duplicate packets are received within replay protection window period. The default value is 5 minutes.
Enter the following command to configure replay protection:
replay-prot-window minutes
NAS considers the new replay protection window value from next window period. The range is from 1 to 10 minutes. The default is 5
minutes.
Dell(conf-dynamic-auth#)replay-prot-window 10
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+
Dell EMC Networking OS 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
• Specifying a TACACS+ Server Host
For a complete listing of all commands related to TACACS+, refer to the Security chapter in the Dell EMC 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.
Security
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