You can define controllers that are allowed to connect to the local system as permitted controllers.

When using the remote control facility, unconditionally allowing controllers to conduct operations may result in damage to the agent's environment due to carelessness or malicious operations. Once a permitted controller is set up, the system can reject connection requests from controllers that are not registered as permitted controllers. If no permitted controller is set up, the system accepts connection requests from any controller.

You can also restrict users making controller connections. For details on how to make the settings, see 3.4.4 Authentication settings.

Use the following dialog box to define permitted controllers. In the Remote Control Agent - Properties dialog box, the Permitted controller page serves as this dialog box.

Figure 3-27 Remote Control Agent Setup dialog box (setting permitted controllers)

Permitted controllers

In the Host name or IP address box, enter the host name or IP address of the machine that you want to permit control for connection.

In this text box, enter no more than 255 characters per item. The host name is case insensitive.

For the host name, specify a name that the agent recognizes. If the definition of the DNS or host name is not the same for the agent and the controller, the system may reject connection or may accept connection from an invalid host.

If processing on the network requires a long time when you specify a host name, specify an IP address consisting of decimal numbers separated by periods.

You can use a wildcard in the host name or IP address to specify multiple permitted controllers at the same time. The following wildcards are available:

* (asterisk)

Represents 0 or more characters.

? (question mark)

Represents any one character.

When you use a wildcard for the host name, the host name must include at least one alphabetic character. For example, if you want to specify the host names 2gHostA and 2gHostB for the permitted controllers, specify 2g* or 2gHost*. If you specify a host name consisting of only numbers and a wildcard, the system handles the host name as an IP address. This might cause incorrect operation.

To use a wildcard for an IP address, you must specify four decimal numbers separated by periods. For example, if you want to specify the IP address 10.208.* or 10.208.??????? for the permitted controller, specify 10.208.*.* or 10.208.??.???. If the IP address contains more or fewer than four periods as separators, the system treats it as a host name. This might cause incorrect operation.

The table below gives examples of using wildcards to specify host names and IP addresses.

Table 3-7 Examples of specifying wildcards

Example	Applicable character string
help*	Host name beginning with help, such as help, helpdesk, and helper
A*z	Host name beginning with A and ending with z
admin?host	Host name containing any one character between admin and host. For example, admin1host and admin2host.
Win??	Host name consisting of five characters beginning with Win
10.208.*.*	IP address from 10.208.0.0 to 10.208.255.255
10.208.93.*	IP address from 10.208.93.0 to 10.208.93.255

Click the Add button to add the entry into the list box under the text box. The list box can have a maximum of 256 items. You cannot add an item that already exists in the list box.

You can also select an item in the list box and click the Delete button to delete the item from the list box. When you select multiple items in the list box, you can delete multiple permitted controllers at the same time.