Avocent SPC420 User Manual

358        DSView 3 Software Installer/User Guide

If the user wishes to establish a session with another port on the KVM switch, the same process is 
used.

For debugging purposes, connection details may be seen by using the console port to place the 
KVM switch into Debug mode.

Like a KVM switch, a serial console appliance may use a non-proxied or a proxied connection. 
Serial console appliances use a Secure Shell Protocol (SSH).

The client contacts the server, which checks the permissions of the target device. If the logged in 
user has permissions to establish sessions to the selected target device, the server will establish a 
connection to the appliance using TCP/IP port 3871 to authorize the session.

In a non-proxied SSH connection, the client communicates directly with the appliance using port 
22.