How do I enable TACACS+ on my Cisco Nexus?

Step 1 Enable TACACS+. Establish the TACACS+ server connections to the Cisco Nexus 5000 Series switch. Step 3 Configure the preshared secret keys for the TACACS+ servers. If needed, configure TACACS+ server groups with subsets of the TACACS+ servers for AAA authentication methods.

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How do I use Tacacs directed request?

To send only a username to a specified server when a direct request is issued, use the tacacs-server directed-request command in global configuration mode. To send the entire string to the TACACS+ server, use the no form of this command. the “@” symbol.

What is tacacs server key?

Creates or modifies a TACACS+ global passkey. The TACACS+ global passkey is used as a shared-secret for encrypting the communication between all TACACS+ servers and the switch. The TACACS+ global passkey is required for authentication unless local passkeys have been set.

How do I enable Tacacs?

1 Configure the switches with the TACACS+ server addresses.
2 Set an authentication key.
3 Configure the key from Step 2 on the TACACS+ servers.
4 Enable authentication, authorization, and accounting (AAA).
5 Create a login authentication method list.
6 Apply the list to the terminal lines.

What is the Tacacs server host?

The tacacs-server host command enables you to specify the names of the IP host or hosts maintaining a TACACS+ server. Because the TACACS+ software searches for the hosts in the order specified, this feature can be useful for setting up a list of preferred daemons. The tacacs-server host command will be deprecated soon.

Is Tacacs secure?

TACACS+ provides security by encrypting all traffic between the NAS and the process. Encryption relies on a secret key that is known to both the client and the TACACS+ process.

How do I connect to Tacacs server?

To setup the TACACS+ Server configuration,

From the menu bar, access Tool -> System Administration.
Select Global.
Expand User Management , then select Authentication Servers.
Select TACACS+ .
In the Server text field, enter the Server Address .
If there is a key for the server, enter the Key.

How does Tacacs server work?

TACACS+ sets up a TCP connection to the TACACS+ host and sends a Start packet. The TACACS+ host responds with a Reply packet, which either grants or denies access, reports an error, or challenges the user. TACACS+ might challenge the user to provide username, password, passcode, or other information.

How does TACACS server work?

How do I connect to TACACS server?

How do I make a Tacacs server?

What is Tacacs used for Cisco?

TACACS and XTACACS both allow a remote access server to communicate with an authentication server in order to determine if the user has access to the network. Terminal Access Controller Access-Control System Plus (TACACS+) is a protocol developed by Cisco and released as an open standard beginning in 1993.

Is TACACS Cisco proprietary?

TACACS+ is Cisco proprietary, whereas RADIUS is an open standard originally created by Livingston Enterprises. Cisco has also developed Cisco Secure Access Control Server (ACS), a flexible family of security servers that supports both RADIUS and TACACS+.

What is the difference between TACACS and radius?

RADIUS was designed to authenticate and log remote network users, while TACACS+ is most commonly used for administrator access to network devices like routers and switches.

What is directed request in Tacacs server?

tacacs-server directed-request. To send only a username to a specified server when a direct request is issued. the “@” symbol. In other words, with the directed-request feature enabled, you can direct a request to

How do I configure the TACACS+ server to send the authentication request?

You can configure the switch to allow the user to specify which TACACS+ server to send the authentication request by enabling the directed-request option. By default, a Cisco NX-OS device forwards an authentication request based on the default AAA authentication method.

What happens when a TACACS+ server is unresponsive?

An unresponsive TACACS+ server can delay the processing of AAA requests. A Cisco NX-OS device can periodically monitor a TACACS+ server to check whether it is responding (or alive) to save time in processing AAA requests. The Cisco NX-OS device marks unresponsive TACACS+ servers as dead and does not send AAA requests to any dead TACACS+ servers.

How does the NX-OS device monitor TACACS+ servers?

A Cisco NX-OS device can periodically monitor a TACACS+ server to check whether it is responding (or alive) to save time in processing AAA requests. The Cisco NX-OS device marks unresponsive TACACS+ servers as dead and does not send AAA requests to any dead TACACS+ servers.