Asked by: Ainnoa Thoenniss
technology and computing computer networking

What is the difference between Radius and Tacacs+ +?

Last Updated: 15th January, 2020

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As TACACS+ uses TCP therefore more reliable than RADIUS. TACACS+ provides more control over the authorization of commands while in RADIUS, no external authorization of commands is supported. All the AAA packets are encrypted in TACACS+ while only the passwords are encrypted in RADIUS i.e more secure.

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Also asked, what are the characteristics of Tacacs +?

TACACS+ uses TCP, while RADIUS uses UDP. TACACS+ encrypts an entire packet, while RADIUS only encrypts a password. TACACS+ offers basic accounting functionality. However, RADIUS offers robust accounting.

Subsequently, question is, what does Tacacs+ keep track of? The main goal of TACACS+ is to provide a centralized database against which to perform authentication. In actuality TACACS+ provides Authentication, Authorization, and Accounting (AAA). Authentication - Refers to who is allowed to gain access to the network.

Also to know is, what is the use of Tacacs+ server?

TACACS+, stands for Terminal Access Controller Access Control Server, is a security protocol used in AAA framework to provide centralised authentication for users who want to gain access to the network.

Which type of device can act as a client in a system that uses Tacacs +?

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.

Related Question Answers

Karime Henzmann

Professional

What is difference between Tacacs and Tacacs+?

TACACS is Cisco's version of a RADIUS server. It is better because it encrypts the entire authentication rather than just the password. TACACS+ is an updated version of TACACS that also supports Kerberos, so that it can authenticate with Active Directory.

Dania Schniederjurgen

Professional

Does radius use TCP or UDP?

RADIUS is a client/server protocol that runs in the application layer, and can use either TCP or UDP as transport. RADIUS is often the back-end of choice for 802.1X authentication as well. The RADIUS server is usually a background process running on a UNIX or Microsoft Windows server.

Irache Libschitz

Professional

Why is Radius better than Tacacs?

As TACACS+ uses TCP therefore more reliable than RADIUS. TACACS+ provides more control over the authorization of commands while in RADIUS, no external authorization of commands is supported. All the AAA packets are encrypted in TACACS+ while only the passwords are encrypted in RADIUS i.e more secure.

Sonali Ratjens

Explainer

What is Tacacs+ and Radius?

TACACS+ encrypts the entire communication. RADIUS combines authentication and Authorization. TACACS+ treats Authentication, Authorization, and Accountability differently. RADIUS is an open protocol supported by multiple vendors.

Urtza El Majdoub

Explainer

Does Tacacs+ use TCP or UDP?

TACACS is defined in RFC 1492, and uses (either TCP or UDP) port 49 by default. TACACS allows a client to accept a username and password and send a query to a TACACS authentication server, sometimes called a TACACS daemon or simply TACACSD. TACACSD uses TCP and usually runs on port 49.

Lani Ercole

Explainer

What port does radius use?

The port values of 1812 for authentication and 1813 for accounting are RADIUS standard ports defined by the Internet Engineering Task Force (IETF) in RFCs 2865 and 2866. However, by default, many access servers use ports 1645 for authentication requests and 1646 for accounting requests.

Salva Mouro

Pundit

Why is Tacacs Authentication required?

TACACS (Terminal Access Controller Access Control System) is an older authentication protocol common to UNIX networks that allows a remote access server to forward a user's logon password to an authentication server to determine whether access can be allowed to a given system.

Aniuska Vajpeyi

Pundit

What is AAA server Cisco?

RADIUS or TACACS+ security servers perform authorization for specific privileges by defining attribute-value (AV) pairs, which would be specific to the individual user rights. In the Cisco IOS, you can define AAA authorization with a named list or authorization method. Accounting: The last "A" is for accounting.

Rishikesh Amesti

Pundit

Is radius secure?

Packet Encryption
RADIUS encrypts only the password in the access-request packet, from the client to the server. However, during normal operation, the body of the packet is fully encrypted for more secure communications.

Pedro Vidaurre

Pundit

When would you use a radius server?

When do I need a RADIUS server? When you have a device to set up that wants to do simple, easy authentication, and that device isn't already a member of the Active Directory domain: Network Access Control for your wired or wireless network clients. Web proxy "toasters" that require user authentication.

Herney Hasbulatov

Pundit

Where is Tacacs+ used?

RADIUS was designed to authenticate and log dial-up remote users to a network, and TACACS+ is used most commonly for administrator access to network devices like routers and switches. This is indicated in the names of the protocols.

Virtud Stefes

Teacher

Does radius do accounting?

RADIUS Accounting
The RADIUS server also collects a variety of information sent by the NAS that can be used for accounting and for reporting on network activity. The RADIUS client sends information to designated RADIUS servers when the User logs on and logs off.

Wesley Guria

Teacher

What is dot1x authentication?

The purpose of 802.1x is to accept or reject users who want full access to a network using 802.1x. It is a security protocol that works with 802.11 wireless networks such as 802.11b,g,n, as well as with wired devices. All NETGEAR ProSAFE Layer 2 and Layer 3 switches support this authentication.

Serotina Stella

Teacher

How do we define radius?

noun, plural ra·di·i [rey-dee-ahy] , ra·di·us·es. a straight line extending from the center of a circle or sphere to the circumference or surface: The radius of a circle is half the diameter. the length of such a line.

Ted Vooth

Teacher

Why we use AAA server?

An AAA server is a server program that handles user requests for access to computer resources and, for an enterprise, provides authentication, authorization, and accounting (AAA) services. Accounting data is used for trend analysis, capacity planning, billing, auditing and cost allocation.

Stanton Palicio

Reviewer

What is AAA in networking?

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.

Talib Marquerink

Reviewer

Which two packet types are used by the Tacacs+ authentication process?

The TACACS+ accounting process uses two packet types—REQUEST and RESPONSE—and operates much like the authorization process. Accounting provides an audit record of user activity on specified network services.

Winfried White

Reviewer

What is OAuth token?

OAuth is an open standard for access delegation, commonly used as a way for Internet users to grant websites or applications access to their information on other websites but without giving them the passwords. The third party then uses the access token to access the protected resources hosted by the resource server.

Eufemia Leceta

Reviewer

Which two characteristics of the Tacacs+ protocol are true?

Which two characteristics of the TACACS+ protocol are true? (Choose two.) RADIUS encrypts only the password in the access-request packet, from the client to the server. The remainder of the packet is unencrypted. Other information, such as username, authorized services, and accounting, can be captured by a third party.