Service - LevelOne FBR-2000 User Manual

Service

In this section, 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.
What is 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), POP3(110),etc. The 10/100M 2
WAN /1 LAN /1 DMZ Multi-Homing Gateway defines 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 1023.
How do I 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.
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