On "Net" page you can specify the masks of nets with which will AVAST32 communicate. The nets, which should informed about that on this computer is AVAST32 program engine running.
For entering the mask click on the "Add" button and in displayed dialog enter the mask number.
More masks can be added again via "Add" button. If you would like to remove some mask, selected it and delete it via "Remove" button.
If you specify no mask, a default value 255. 255. 255. 255 will be used.
Then is necessary to set net mask for this computer. This can be done via editing the values displayed in the "Netmask for this computer" text box in the lower part of the page. The address entered to this text box determines the mask of a net, to which is this computer connected.
To take effect these changes you have to restart the program engine.