Administrator Guide

Switch Management Commands 2283

Telnet Server Commands

The Telnet protocol (outlined in RFC 854) allows users (clients) to connect

to multiuser computers (servers) on the network. Telnet is often employed

when a user communicates with a remote login service.

Telnet is the terminal emulation protocol in the TCP/IP suite. Telnet uses

TCP as the transport protocol to initiate a connection between server and

client. After connecting, the telnet server and client enter a period of option

negotiation that determines the options each side is capable of supporting for

the connection. The connected systems can negotiate new options or

renegotiate old options at any time. In general, each end of the Telnet

connection attempts to implement all options that maximize performance

for the systems involved.

When a Telnet connection is initiated, each side of the connection is

assumed to originate and terminate at a Network Virtual Terminal, or NVT.

Therefore, the server and user hosts do not maintain information about the

characteristics of each other's terminals and terminal-handling conventions.

Telnet Client Behaviors

Different telnet clients operate differently with respect to the display of the

behaviors have been observed for some widely used telnet clients with a

MOTD banner configured with the following text:

If you need to utilize this device or otherwise make changes to the

configuration, you may contact the owner at x38525.

Please, be advised this unit is under test.

and a login banner configured with the following text:

Welcome to the N3024 in the Bottom Chassis - 192.168.12.190. This unit is

located in A2 and is currently under test.

Examples

SSH (putty):

If you need to utilize this device or otherwise make changes to the

configuration, you may contact the owner at x38525.

Please, be advised this unit is under test.