Cirkuit Planet MH-2001 用户手册

MH-2001 Multi-Homing Security Gateway User’s Manual 

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. 

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. MH-2001 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 0 to 65535 and the server port ranges from 0 to 65535. 

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.   

Step 1. Click 

Pre-defined under it. A window will appear with a list of services and their associated IP 

addresses. This list cannot be modified.

 

 

 

 

 

 

 

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