Firewall; Packet Filter - Billion BiPAC 7800(N) User Manual

Firewall

Packet Filter

Packet filtering enables you to configure your router to block specific internal / external users (IP
address) from Internet access, or disable specific service requests (Port number) to / from the
Internet. This configuration program allows you to set up different filter rules for different users
based on their IP addresses or their network Port number. The relationship among all filters is "or"
operation, which means that the router checks these different filter rules one by one, starting from
the first rule. As long as one of the rules is satisfied, the specified action will be taken.
Rule Name: User defined description for entry identification. The maximum name length is 32
characters, and then can choose an application that they want from the listbox.
Source IP address: This is an Address-Filter used to allow or block traffic from particular IP
address(es). Enter the IP range that you want to filter. If only the first IP block is filled, it means
only that IP entered will be targeted. If you leave both IP blocks empty, it means any IP address.
Destination IP address: This is an Address-Filter used to allow or block traffic to particular IP
address(es). Enter the IP range that you want to filter. If only the first IP block is filled, it means
only that IP entered will be targeted. If you leave both IP blocks empty, it means any IP address.
Source Port: This is the Port Range that defines the ports allowed by the Remote/WAN to
connect to the application. Default is set from range 0 ~ 65535. It is recommended that only
advance user is to configure this feature.
Destination Port: This is the Port Range that defines the port of the application.
Protocol: Specify the packet type (TCP, UDP, TCP/UDP) that the rule applies to. Select TCP if
you wish to search for the connection-based application service on the remote server using the
port number. Or select UDP if you want to search for the connectionless application service on the
remote server using the port number.
Direction: Determine whether the rule is for outgoing packets or for incoming packets.
Add: Click this button to add a new packet filter rule and the added rule will appear at the bottom
table.
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