Chapter 4 Centralized Configuration

1Host Identification

The SSH client sends a connection request to the SSH server. The server identifies itself with a host key. The client encrypts a randomly generated session key with the host key and server key and sends the result back to the server.

The client automatically saves any new server public keys. In subsequent connections, the server public key is checked against the saved version on the client computer.

2Encryption Method

Once the identification is verified, both the client and server must agree on the type of encryption method to use.

3Authentication and Data Transmission

After the identification is verified and data encryption activated, a secure tunnel is established between the client and the server. The client then sends its authentication information (user name and password) to the server to log in to the server.

4.4SSH Implementation on the NXC-8160

Your NXC-8160 supports SSH version 1 and 2 using RSA authentication and three encryption methods (DES, 3DES and Blowfish). The SSH server is implemented on the NXC-8160 for management and file transfer on port 22.

4.4.1 Requirements for Using SSH

You must install an SSH client program on a client computer (Windows or Linux operating system) that is used to connect to the NXC-8160 over SSH.

4.5 Centralized Configuration Screen

Click Centralized Configuration to display the screen as shown next. Use this screen to set each NXC-8160 as a master or member controller. The screen changes depending on whether you select the Master Controller check box.

By default, the Master Controller check box is not selected and the NXC-8160 acts as a member controller.

Figure 13 Centralized Configuration (Member)

 

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NXC-8160 User’s Guide