The configure dialog for sockets.

Local:
In this fields, you can configure the local address and port to bind to, in case of Server Mode. The used format is like this: 1.2.3.4:42. This will bind to the local address 1.2.3.4 to port 42. The usage of 1.2.3.4 as local address causes to wait on connections on every ethernet port.

Remote:
In this fields, you can configure the remote address and port to bind to, in case of Client Mode. The used format is like this: 1.2.3.50:42. This will bind to the remote address 1.2.3.50 to port 42.

User + Password:
Here you can set the user and password to use in case of Telnet Protocol.

Mode:
You have to choose between Client or Server sockets.

Protocol:
In this field you have to configure the used protocol. TCP/IP and UDP will open normal ethernet sockets. Telnet (only client) will open a telnet session to a remote host. And last but not least UnixDomainSocket will open a unix domain socket on Linux.