RL-ARM User's Guide

Telnet Server

Telnet is most often used for remote login. A user typically uses a Telnet client program to open a Telnet connection to a remote server. The server then treats the Telnet client like a local terminal and allows the user to log in and access the server's resources as if the user was using a directly-attached terminal. Telnet is still used this way quite extensively by UNIX users, who often need to log in to remote hosts from their local machines.

It is the client and server devices that decide whether Telnet is used for remote access or for some other purpose. When Telnet is used to access a remote device, the protocol itself is used to:

• set up the connection between the client and server machines
• encode data to be transmitted according to the rules of the Telnet Network Virtual Terminal (NVT)
• facilitate the negotiation and use of options.

Using the RL-TCPnet Embedded Telnet Server, you can build a simple command line interface that enables a Telnet client to access and control the remote embedded system.

Supported Features

The Embedded Telnet server has integrated several advanced features:

• Access filtering
  allows you to filter out the hosts, which are not allowed to connect to the Telnet Server.
• Multi-user Authentication
  allows you to add additional user accounts and different access rights for each user.

• In order to use the Embedded Telnet Server, you have to enable and configure it in the configuration file.