The process for adding and configuring a DMZ Permanent Standby server is very similar to the process used when adding and configuring a 'normal' Permanent Standby server. The only differences are:
- When you configure the server that is to be a DMZ Permanent Standby server, you need to select DMZ Permanent Server in the Type combo box.
- When you are configuring the Main and Standby servers to recognize the DMZ Permanent Standby server(s), you need to select the DMZ check box. The DMZ Permanent Standby server will be unable to connect to the system if the DMZ check box(es) are cleared.
ATTENTION: If you configure a 'normal' Permanent Standby server and then configure the Main server or Standby server to have the DMZ setting enabled for the Permanent Standby server, the connection will fail. A Main server or Standby server can only connect to a Permanent Standby Server if the Permanent Standby server’s Type is set to Permanent Standby Server and the DMZ check box is clear on the Main and Standby servers. Similarly, a Main or Standby server can only connect to a DMZ Permanent Standby server if the DMZ Permanent Standby server’s Type is set to DMZ Permanent Standby Server and the DMZ check box is selected on the Main and Standby servers.
The other aspects of the DMZ Permanent Server configuration are the same as those for the configuration of a 'normal' Permanent Server.
To configure a DMZ Permanent Standby server, you need to:
- Add a DMZ Permanent Standby server in the same way as you would add a 'normal' Permanent Standby server, with the following exception:
- Choose DMZ Permanent Standby Server as the Type. Do not choose Permanent Standby Server as the type as this will set the server to have a connection back to the ClearSCADA system.
- On the DMZ Permanent Standby server, install the same drivers that are already installed on the Main server.
ATTENTION: You should install the same drivers on the DMZ Permanent Standby server as those installed on the Main server. If the Main server has drivers that are not installed on the DMZ Permanent Standby, the DMZ Permanent Standby server will not be able to establish a connection with the Main server.
- Configure the DMZ Permanent Standby server to recognize the Main and Standby servers as appropriate. (Use the Standby A and Standby B settings in the same way as you would when configuring a 'normal' Permanent Standby' server).
- Configure the Main server to recognize the DMZ Permanent Standby server. To do this, you need to use the settings in the Permanent Standby A, Permanent Standby B, Permanent Standby C and Permanent Standby D columns, in the same way as you would when configuring a Main server to recognize a 'normal' Permanent Standby server. The only difference is that you need to select the DMZ check box so that the Main server can establish a connection to the DMZ Permanent Standby server.
- Configure the Standby server to recognize the DMZ Permanent Standby server. To do this, you need to use the settings in the Permanent Standby 1 or Permanent Standby 2 columns, in the same way as you would when configuring a Standby server to recognize a 'normal' Permanent Standby server. The only difference is that you should select the DMZ check box so that the Standby server can establish a connection to the DMZ Permanent Standby server.
Further Information