Specifications

Configuration with QuickSET
114 QuickSET Configuration Guide
Firewall Window
The Firewall configuration window shown in Figure 125 displays after clicking on the Firewall...
button in the first Bridging and Routing configuration window. The Firewall configuration window
is used to configure an Access Control List (ACL).
The Access Control List lets you restrict traffic to, from, or between specific IP hosts, subnets, or
networks. You can configure access control restrictions based on the following:
• The source, destination, or a combination of the source and destination address of a packet.
• The upper layer protocol type of a packet such as TCP, UDP, ICMP, or all TCP/IP protocols.
• The TCP or UDP port number of a packet.
• Interface Number.
When an IP Access Control List (ACL) is enabled on a router port, each packet forwarded out this
port is first checked against the ACL. If the address(es) of a packet match the address(es) in the
first filter in the list, the packet is permitted or denied as specified by that filter. If there is no match,
the packet is checked against the second filter, and so on, until a match is found, or until the packet
has been checked against all of the filters in the list. If the packet does not match any of the filters,
then the packet is permitted to pass through the port.
The Add Firewall Entry window (shown on the following page in Figure 126) appears when you
click on the
A
dd Firewall button in the Firewall Entries panel (upper half) of the Firewall Configuration
Window. Use your mouse or the Tab key to navigate through the data fields.
Click OK when you have finished entering the data. Your new firewall entry will appear in the
Firewall Configuration Window.