What is accounting in TACACS?
TACACS+ accounting allows network managers to log all the activity (commands) executed on the switch. To configure TACACS+ accounting, follow these steps: 1) Configure the TACACS server. aaa authentication-server tacacs
What is AAA Accounting Exec?
Configures the AAA accounting configuration parameters for SSH and Telnet access.
Which port does TACACS+ use for accounting?
49
Difference between TACACS+ and RADIUS
| TACACS+ | RADIUS |
|---|---|
| It uses TCP port number 49. | It uses UDP port number 1812 for authentication and authorization and 1813 for accounting. |
| Authentication, Authorization, and Accounting are separated in TACACS+. | Authentication and Authorization are combined in RADIUS. |
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.
What is AAA authorization config commands?
Authorization of configuration mode commands is enabled using the aaa authorization config-commands command. command authorization configuration as it prevents the feature from being disabled to gain access to unauthorized exec mode commands. You can configure multiple TACACS+ servers for redundancy.
Does Tacacs use TCP or UDP?
TACACS+ provides separate authentication, authorization and accounting services. TACACS+ uses TCP as transmission protocol therefore does not have to implement transmission control. It uses TCP port number 49. If the device and ACS server is using TACACS+ then all the AAA packets exchanged between them are encrypted.
What is AAA authorization network?
AAA stands for authentication, authorization, and accounting. AAA is a framework for intelligently controlling access to computer resources, enforcing policies, auditing usage, and providing the information necessary to bill for services.
Is TACACS a AAA?
While TACACS+ is mainly used for Device Administration AAA, it is possible to use it for some types of network access AAA. TACACS+ uses Transmission Control Protocol (TCP) port 49 to communicate between the TACACS+ client and the TACACS+ server.
How does CHAP work?
How does CHAP work?
- After the link is made, the server sends a challenge message to the connection requestor.
- The requestor responds with a value obtained by using a one-way hash function known as MD5.
- The server checks the response by comparing it with its own calculation of the expected hash value.
Is Tacacs deprecated?
TACACS+ and RADIUS have generally replaced TACACS and XTACACS in more recently built or updated networks.
What are the disadvantages of TACACS+?
Disadvantage –
- As it is Cisco proprietary, therefore it can be used between the Cisco devices only. TACAS+ is an open standard RFC8907.
- Less extensive support for accounting than RADIUS.
What is TACACS+ accounting?
Specifying TACACS Accounting AAA accounting enables you to track the services users are accessing as well as the amount of network resources they are consuming. Because TACACS+ accounting is facilitated through AAA, you must issue the aaa accounting command, specifying TACACS+ as the accounting method.
How do I set up TACACS+ accounting through AAA?
Because TACACS+ accounting is facilitated through AAA, you must issue the aaa accounting command, specifying TACACS+ as the accounting method. For more information, refer to the chapter “Configuring Accounting.”
How do I set up a TACACS+ authentication server?
On the Main tab, click Access Policy > AAA Servers > TACACS+. The TACACS+ Servers list screen opens. Click Create. The New Server properties screen opens. In the Name field, type a unique name for the authentication server. Select Use Pool to set up high availability for the AAA server.
How does TACACS+ work on remote servers?
If you use TACACS+ authentication, user credentials are authenticated on a remote TACACS+ server. If you use the TACACS+ Accounting feature, the accounting service sends start and stop accounting records to the remote server.