the pix firewall telnet interface provides a command-line interface similar to cisco ios software. the telnet interface lets you remotely manage the pix firewall via the console interface. the telnet interface limits access of the telnet interface to specified client systems within the inside network (based on source address) and is password protected. if the inside network is not secure and sessions on the lan can be snooped, you should limit use of the telnet interface. if ipsec is configured, you can also access the pix firewall console from the outside interface.