SSH has improved security over Telnet. iDRAC only supports SSH version 2 with password authentication, and is enabled by default. iDRAC supports up to two SSH sessions and two Telnet sessions at a time. It is recommended to use SSH as Telnet is not a secure protocol. You must use Telnet only if you cannot install an SSH client or if your network infrastructure is secure.
Use open-source programs such as PuTTY or OpenSSH that support SSH and Telnet network protocols on a management station to connect to iDRAC.
Before using SSH or Telnet to communicate with iDRAC, make sure to:
Telnet (port 23)/ SSH (port 22) client <−−> WAN connection <−−> iDRAC
The IPMI-based SOL that uses SSH or Telnet protocol eliminates the need for an additional utility because the serial to network translation happens within iDRAC. The SSH or Telnet console that you use must be able to interpret and respond to the data arriving from the serial port of the managed system. The serial port usually attaches to a shell that emulates an ANSI- or VT100/VT220–terminal. The serial console is automatically redirected to the SSH or Telnet console.