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    Vty Line Authentication and Authorization Overview

    The router supports 30 virtual tty (vty) lines for Telnet, Secure Shell Server (SSH) and FTP services. Each Telnet, SSH, or FTP session requires one vty line. You can add security to your router by configuring the software to validate login requests. There are two modes of authentication for a vty line:

    • Simple authentication—Password-only authentication through the local configuration
    • AAA authentication—Username and password authentication through a set of authentication servers

    You can enable AAA authorization, which allows you to limit the services available to a user. Based on information retrieved from a user’s profile, the user is either granted or denied access to the requested server.

    Published: 2014-08-12