You can configure TELNET using either the SDF command or the option file.
This chapter covers the following topics related to the configuration and operation of TELNET servers:
- Using TLS to secure the TELNET server (see "TLS/SSL support on the TELNET server") 
- Configuration of TELNET via SDF command (see "Configuring TELNET using the SET-FTP-TELNET- PARAMETERS installation command") or option file (see "Configuring TELNET using an option file") 
- Startup and shutdown of TELNET servers (see "Starting up and shutting down the TELNET server") 
- Saving the logging file of TELNET servers (see "Logging file of TELNET servers") 
- Displaying the current settings of the TELNET server (see "Displaying the current settings of TELNET servers") 
- Specification of commands using the console interface (see "Console interface") 
- Using IPv6 addresses in TELNET (see "IPv6 addresses in TELNET") 
- Exits for TELNET clients and the TELNET server (see "TELNET exits")