PLANET SG-1000 - Manual (Page 70)

Chapter 6
Service
TCP and UDP protocols support varieties of services, and each service consists of a
TCP Port or UDP port number, such as TELNET (23), SMTP (21), SMTP (25), POP3
(110), etc. The SG-1000 includes two services: Pre-defined Service and Custom
Service.
The common-use services like TCP and UDP are defined in the Pre-defined Service and
cannot be modified or removed. In the custom menu, users can define other TCP port
and UDP port numbers that are not in the pre-defined menu according to their needs.
When defining custom services, the client port ranges from 1024 to 65535 and the
server port ranges from 0 to 65535
In this chapter, network services are defined and new network services can be added.
There are three sub menus under Service which are: Pre-defined, Custom, and Group.
The Administrator can simply follow the instructions below to define the protocols and
port numbers for network communication applications. Users then can connect to
servers and other computers through these available network services.
How to use Service?
The Administrator can add new service group names in the Group option under Service
menu, and assign desired services into that new group. Using service group the
Administrator can simplify the processes of setting up control policies. For example,
there are 10 different computers that want to access 5 different services on a server,
such as HTTP, FTP, SMTP, POP3, and TELNET. Without the help of service groups,
the Administrator needs to set up 50 (10x5) control policies, but by applying all 5
services to a single group name in the Service field, it takes only one control policy to
achieve the same effect as the 50 control policies.