what is remote authentication dial-in user service (radius)? course hero

What is RADIUS (Remote Authentication Dial-in user service)?

What is RADIUS (Remote Authentication Dial-In User Service)? RADIUS (Remote Authentication Dial-In User Service) is a client-server protocol and software that enables remote access servers to communicate with a central server to authenticate dial-in users and authorize their access to the requested system or service.

How does a RADIUS client work?

The client passes user information to designated RADIUS servers and acts on the response that is returned. RADIUS servers receive user connection requests, authenticate the user, and then return the configuration information necessary for the client to deliver service to the user.

Can a RADIUS server act as a proxy?

A RADIUS server can act as a proxy client to other RADIUS servers or other kinds of authentication servers. This figure shows the interaction between a dial-in user and the RADIUS client and server. User initiates PPP authentication to the NAS.

What is the RADIUS protocol?

The Remote Authentication Dial-In User Service (RADIUS) protocol was developed by Livingston Enterprises, Inc., as an access server authentication and accounting protocol. The RADIUS specification RFC 2865 obsoletes RFC 2138. The RADIUS accounting standard RFC 2866 obsoletes RFC 2139.

What does a Remote Authentication Dial In User Service Radius server provide?

Remote Authentication Dial-In User Service (RADIUS) is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA or Triple A) management for users who connect and use a network service.

What is RADIUS authentication method?

RADIUS (Remote Authentication Dial-In User Service) authenticates the local and remote users on a company network. RADIUS is a client/server system that keeps the authentication information for users, remote access servers, VPN gateways, and other resources in one central database.

Is RADIUS an authentication service?

RADIUS is a protocol that was originally designed to authenticate remote users to a dial-in access server. RADIUS is now used in a wide range of authentication scenarios. RADIUS is a client-server protocol, with the Firebox as the client and the RADIUS server as the server.

Which two ports are used for RADIUS for authentication messages?

The RADIUS protocol uses UDP packets. There are two UDP ports used as the destination port for RADIUS authentication packets (ports 1645 and 1812). Note that port 1812 is in more common use than port 1645 for authentication packets.

What is RADIUS in remote access?

RADIUS (Remote Authentication Dial-In User Service) is a client-server protocol and software that enables remote access servers to communicate with a central server to authenticate dial-in users and authorize their access to the requested system or service.

Is RADIUS authentication secure?

Secure VPN authentication: RADIUS authentication not only securely connects users to WiFi networks, but it also works with VPNs. This flexibility allows any user to connect to a network easily and securely.

How does WiFi RADIUS authentication work?

RADIUS Improves WiFi Security In order to access a wireless network secured by RADIUS, the user must provide their own unique, core set of credentials. Essentially, the credentials a user has for their work system are the same ones they will use to log in to the network.

What types of devices can be authenticated by a RADIUS server?

RADIUS is a key security feature for WPA2-Enterprise and 802.1x. Networks can configure secure authentication for Wi-Fi, desktop login, VPN, email, and more using RADIUS.

How do I setup a wireless authentication RADIUS server?

RADIUS AccountingNavigate to Wireless > Configure > Access control and select the desired SSID from the dropdown menu.Under RADIUS accounting, select RADIUS accounting is enabled.Under RADIUS accounting servers, click Add a server. ... Enter the details for: ... Click Save changes.

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.

Which port does RADIUS use for authentication on legacy server?

Accessing the RADIUS serviceProtocolLegacy PortIANA-Assigned PortAuthentication16451812Accounting16461813Aug 10, 2018

What is AAA in networking?

Authentication, authorization, and accounting (AAA) is a security framework that controls access to computer resources, enforces policies, and audits usage.

What is RADIUS (Remote Authentication Dial-In User Service)?

RADIUS (Remote Authentication Dial-In User Service) is a client-server protocol and software that enables remote access servers to communicate with a central server to authenticate dial-in users and authorize their access to the requested system or service.

How does RADIUS authentication work?

In the RADIUS protocol, remote network users connect to their networks through a network access server ( NAS ). The NAS queries the authentication server to get authentication, authorization and configuration information about the remote user.

What is a Radius server?

The RADIUS server can support a variety of methods to authenticate a user. When it is provided with the username and original password given by the user, it can support PPP, PAP or CHAP, UNIX login, and other authentication mechanisms.

What is the purpose of the RADIUS accounting function?

The RADIUS accounting functions allow data to be sent at the start and end of sessions, indicating the amount of resources (such as time, packets, bytes, and so on) used during the session.

What port is used for RADIUS?

The early deployment of RADIUS was done using UDP port number 1645, which conflicts with the "datametrics" service. Because of this conflict, RFC 2865 officially assigned port number 1812 for RADIUS. Most Cisco devices and applications offer support for either set of port numbers.

What is the UDP protocol for NAS?

Communication between a network access server (NAS) and a RADIUS server is based on the User Datagram Protocol (UDP). Generally, the RADIUS protocol is considered a connectionless service. Issues related to server availability, retransmission, and timeouts are handled by the RADIUS-enabled devices rather than the transmission protocol.