At the top of the dialog is placed a list with two options that lets you choose a way of connecting with dnmmsd server. The first one allows you to connect with the server by a socket file which a name you can write below. The second one lets you connect with the server by a computer network. Then you should pass a computer name or its IP address and a number of TCP port on which the server works on a given computer.

Read-Only mode enabled field shows if a Read-Only mode is turned on or not. If it's active, it will run in a Read-Only mode when a time specified in Idle time (seconds) field goes on. If you want to make changes in Network Information Database, you should login again on dnmmsd server.