Serial/AUX>Physical Ports>General>Console Access Server ProtocolsWhen a serial port is connected to the console port on a device, a Console Access Server (CAS) profile must be defined for the serial port using values you supply in the serial port configuration screens. Selecting the appropriate connection protocol on the Configuration>Serial/AUX>Physical Ports>General Screen is part of defining the CAS profile The connection protocols apply in the following cases:
• When a user accesses the serial port through the Web Manager, the session automatically uses the specified protocol to connect to the console of the connected device.
• When a user logs in remotely over the Internet to the serial port, access is allowed only for the selected protocol. If the user uses another protocol, access is denied. For example, if you specify the “Console (SSH)” protocol, the user can use ssh but cannot use telnet to access the serial port.The options from the list of connection protocols in the following table are used when the OnSite serial port is connected to the console port of a server or other device.
Protocols for Devices With Console Ports Connected to Serial Ports Authorized users can use telnet to connect to the console of the connected device. Authorized users can use ssh to connect to the console of the connected device. Console (TelnetSSH) Authorized users can use telnet or SSH to connect to the console of the connected device. When shared sessions are allowed, simultaneous telnet and SSH sessions are allowed through the serial port. Authorized users can make a raw socket connection to the console of the connected device.The remaining serial port connection protocol options are nonstandard, and they should only be used by expert administrators to meet special serial port configuration needs.