It is a good practice to block interactive logins on any line by configuring the login and no password commands. It is essential that you ensure that appropriate controls are applied on both VTY lines and TTY lines otherwise, system security may be compromised.
Interactive AccessĬisco IOS software supports connections via Telnet rlogin, SSH, and non-IP– based network protocols (e.g., LAT, MOP, X.29, and V.120) and local asynchronous connections and modem dial-ups. Being able to view command-line interfaces (CLIs) before they are sent to the device can be useful. You should use CNA primarily as an additional source of evidence. Network security settings (Catalyst Express 500 series) ▪ĭrag-and-drop Cisco IOS software upgrades Troubleshooting advice (Catalyst Express 500 series) ▪ According to Cisco, CNA provides the following functionality: ▪ Any registered user can download it from the Cisco Web site ( You can use CNA to administer Cisco network devices. The Cisco Network Assistant (CNA) is a free graphical tool from Cisco.
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