Digital Equipment RapidPrint 500, Reference Manual, Page: 55 / 192

Ports Virtual Ports
5 - 1
5 - Ports
This chapter covers port-specific configuration for the RapidPrint 500, including virtual port con-
figuration, port groups, port names, and security features.
5.1 Virtual Ports
Incoming Telnet and Rlogin connections are not associated with a physical port. Instead, they are
associated with a virtual port, port 0, which serves for the duration of the connection.
Each virtual port is created with a default set of characteristics. The Define Port commands can be
used to customize a virtual port during the Telnet/Rlogin session; however, these customizations
cannot be saved. The port reverts to the default set of characteristics once the session is closed.
To make configurations that apply to all virtual ports (all future Telnet/Rlogin connections), use
Define Port commands and specify zero as the port number.
Figure 5-1 displays an example.
Figure 5-1: Configuring Virtual Ports
When the command in Figure 5-1 is used, all ports will process the Break key locally rather than
passing it on to the remote service.
Because NCP and Telnet remote console sessions are considered virtual logins, configurations
made with Define Port 0 commands will apply to them. Define Port 0 commands are often used to
provide local switches to network logins, as they typically do not have a Break key to use after the
connection is made.
To display the characteristics used for virtual ports, enter the following command:
Figure 5-2: Displaying Virtual Port Characteristics
5.2 General Port Characteristics
5.2.1 Group Numbers
Each port can be given one or more authorized LAT group numbers. By default, only group zero is
authorized, which restricts a port’s access to only those nodes that offer services in group zero.
The server is also configured for group zero, so by default, all ports can access any services local to
this RapidPrint 500. To allow port 1 access to specific groups, enter the
Set/Define Port Autho-
rized Groups command.
Figure 5-3: Defining Port Authorized Group
NOTE: For information on server-wide enabling of LAT groups, see Set/Define Server Ser-
vice Groups .
Local>> DEFINE PORT 0 LOCAL SWITCH ^F
Local>> LIST PORT 0
Local> DEFINE PORT 1 AUTHORIZED GROUPS 0,77,122-178