8 Configuring Network Access96 Nokia IP40 User Guide! IP Address Range! ANYdepending on the access restrictions you want to provide. Clicking on Internal Networkenables only machines from your Internal Network to access your IP40 through SSH;Similarly, clicking on ANY enables any host (with “Any” IP address) to connect to IP40through SSH, and so on.Enabling/Disabling SSH ServiceNoteSecure Shell options cannot be configured from the Nokia IP40 GUI. You should use thecommand-line options from a command shell (such as HyperTerminal) to configure theseoptions. A brief listing of important command-line options for configuring Secure Shell (SSH)has been included in the user guide for the purpose of introduction. Refer to IP40 CLIReference Guide for additional and detailed information.Use the following commands to enable, disable and show the status of SSH service.set ssh serverenable <0 / 1>show ssh serverenableArgumentsenable <0 / 1>The value of 0 disables SSH and the value of 1 enables SSH. The default value is 1 since SecureShell is enabled by default.SSH Authentication MethodsThere are two SSH authentication methods:! Password Authentication — Password authentication is set up by default. In this method,you can connect to the SSH server running on IP40 from the SSH client installed on yourmachine, after entering your password.! Public Key Authentication — Public Key Authentication is one of the most secure ways toauthenticate using SSH. The basic principle in Public Key Authentication is the use of a pairof computer generated keys - private key and public key. A public key is not useful unlessyou have the corresponding private key.