| 13.4 |  | System Maintenance via Remote Access |
| 13.4.1 |  | Configuring telnet access to the PIX Security Appliance console |

| The serial console permits a single user to configure the PIX Security Appliance, but often this is not for a site convenient with more than one administrator. By configuring Telnet, console access can be enabled for up to five hosts or networks to remotely access the PIX Security Appliance console simultaneously.

Telnet can be enabled to the PIX on all interfaces. However, the PIX Security Appliance requires that all Telnet traffic to the outside interface be IP Security (IPSec) protected. To enable a Telnet session to the outside interface, configure IPSec on the outside interface to include IP traffic generated by the PIX Security Appliance, and enable Telnet on the outside interface. The Telnet commands used to do this are the telnet, telnet timeout, and passwd commands. These commands and their syntaxes are examined in the Command Reference. Configuring IPSec on the PIX Security Appliance will be introduced in module 14.

Once a PIX Security Appliance has been configured to accept remote access to it via Telnet, it is then useful for an administrator to know how to verify and troubleshoot Telnet connections and configurations. The Command Reference explains some of the most common commands used for this purpose.

| Lab Activity e-Lab Activity: telnet Command In this activity, the student will demonstrate how to use the telnet command.