Parameter

Description

no-access

No commands are accessible for this role

 

 

read-only

Read-only role

 

 

no access

Negates any configured parameter.

 

 

Server Group

Name of the group of servers used to authenticate administrative users. See the CLI command aaa-

 

server-group, in the CLI Command Reference Guide for more information.

Managing Certificates

The controller is designed to provide secure services through the use of digital certificates. Certificates provide security when authenticating users and computers and eliminate the need for less secure password-based authentication.

There is a default server certificate installed in the controller to demonstrate the authentication of the controller for captive portal and WebUI management access. However, this certificate does not guarantee security in production networks. Dellstrongly recommends that you replace the default certificate with a custom certificate issued for your site or domain by a trusted Certificate Authority (CA). This section describes how to generate a Certificate Signing Request (CSR) to submit to a CA and how to import the signed certificate received from the CA into the controller.

The controller supports client authentication using digital certificates for specific user-centric network services, such as AAA FastConnect, VPN (see Virtual Private Networks on page 271), and WebUI and SSH management access. Each service can employ different sets of client and server certificates.

During certificate-based authentication, the controller provides its server certificate to the client for authentication. After validating the controller’s server certificate, the client presents its own certificate to the controller for authentication. To validate the client certificate, the controller checks the certificate revocation list (CRL) maintained by the CA that issued the client certificate. After validating the client’s certificate, the controller can check the user name in the certificate with the configured authentication server (this action is optional and configurable).

About Digital Certificates

Clients and the servers to which they connect may hold authentication certificates that validate their identities. When a client connects to a server for the first time, or the first time since its previous certificate has expired or been revoked, the server requests that the client transmit its authentication certificate. The client’s certificate is then verified against the CA which issued it. Clients can also request and verify the server’s authentication certificate. For some applications, such as 802.1x authentication, clients do not need to validate the server certificate for the authentication to function.

Digital certificates are issued by a CA which can be either a commercial, third-party company or a private CA controlled by your organization. The CA is trusted to authenticate the owner of the certificate before issuing a certificate. A CA-signed certificate guarantees the identity of the certificate holder. This is done by comparing the digital signature on a client or server certificate to the signature on the certificate for the CA. When CA-signed certificates are used to authenticate clients, the controller checks the validity of client certificates using certificate revocation lists (CRLs) maintained by the CA that issued the certificate.

Digital certificates employ public key infrastructure (PKI), which requires a private-public key pair. A digital certificate is associated with a private key, known only to the certificate owner, and a public key. A certificate

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

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Dell 6.2 manual Managing Certificates, About Digital Certificates

6.2 specifications

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