c# zxing qr code generator Centralized accounting IAS collects usage or accounting information from all network access servers. in Visual C#.NET

Printer QR Code 2d barcode in Visual C#.NET Centralized accounting IAS collects usage or accounting information from all network access servers.

Centralized accounting IAS collects usage or accounting information from all network access servers.
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Designing Security for Remote Access Users
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Centralized authentication IAS supports many of the standard authentication methods such as Challenge Handshake Authentication Protocol (CHAP), Microsoft Challenge Handshake Authentication Protocol (MS-CHAP versions 1 and 2), and Extensible Authentication Protocol (EAP). IAS interoperates with network access devices from different vendors regardless of the access method used. If IAS is configured as a member of an Active Directory domain, the user account database is used to authenticate and authorize access to the network. Centralized auditing IAS logs all authentication Accepts and Rejects, as well as usage information such as logon and logoff records.
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Instead of having your dial-up server or VPN server performing these tasks and storing accounting and auditing information, you can configure them to be RADIUS clients, each forwarding all connection requests to your IAS server. Any remote access policies stored on these RADIUS clients are no longer used. Instead, these policies, which are stored on the IAS server, will be used.
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Designing a RADIUS Solution
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When you begin your design, you first need to determine the role of your IAS server. That is, will it be a RADIUS server, RADIUS client, or RADIUS proxy There is a good possibility that your design may require the use of a RADIUS server. As you recall, a network access server running the IAS is a RADIUS server. Instead of having multiple RADIUS clients performing authentication, authorization, accounting and auditing, you can have one server perform all of these functions. As always, you must consider the following when designing a RADIUS strategy:
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Securing your RADIUS solution Availability of RADIUS to your remote users Improving RADIUS performance
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You must once again reference your topology diagrams so you can determine
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The geographic locations of the remote users. Number of users at each of the locations. The connection type between each geographic location, for instance, T1 line, Frame Relay, and so forth.
Securing Your RADIUS Solution
Because remote access users will have access to your company s internal private network, your RADIUS solution must protect this confidential information. You must secure the connection between the remote access client and the RADIUS client, as well as the connection between the RADIUS client and the RADIUS server. You can use
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Designing a Remote Access Strategy
remote access policies that the RADIUS client can use to restrict remote access users. The advantage of applying remote access policies on the RADIUS server, instead of on the RADIUS client, is that the remote access policies of the RADIUS server are applied to all remote access users. All RADIUS clients who are assigned to a RADIUS server use the remote access policies configured on the RADIUS server and ignore any policies configured on the RADIUS client. Authentication protocols and methods, as well as the encryption algorithms covered previously in this chapter, may also be used to enhance the security of your RADIUS solution. Because a RADIUS server is a network access server, which supports all authentication protocols, RADIUS servers also support all of the authentication proto cols covered earlier:
MS-CHAP v1, v2 EAP-TLS CHAP SPAP PAP
RADIUS clients support data encryption for remote access clients by using MPPE over PPTP, and IPSec if Layer 2 Transfer Protocol is chosen as the tunneling protocol. IPSec enables you to encrypt up to 160-bit encryption algorithm, called 3-DES (pronounced as triple-dez ).
Availability of a RADIUS Solution
If your remote access design includes state-of-the-art equipment, enhanced security features, and so forth, but is not available for remote users, then you have not accomplished your goal as a network engineer. Once again, availability of the network infrastructure and the company s network resources is probably the most important aspect of your job. The most obvious way to increase the chances of your RADIUS solution being available to your remote users is to include more than one RADIUS cli ent and server. However, it is important that you balance this need for availability with the costs of the hardware needed to duplicate these IAS servers and with the com pany s need for such a level of availability. If you do decide that your company should have two IAS servers configured as RADIUS servers, be sure to:
Configure the RADIUS clients as RADIUS proxies. This will enable load balancing because the RADIUS proxy can forward connection requests to either of the two RADIUS servers configured.
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