Cabletron Systems CyberSWITCH CSX500 Specifications download pdf (Page 50)

Configuration with QuickSET

34 QuickSET Configuration Guide

Firewall Conﬁguration Window

The Firewall conﬁguration window shown in Figure 33 below, displays after clicking on the

Firew

all... 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.

Figure 33 Firewall Conﬁguration Window

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Cabletron Systems CyberSWITCH CSX500 Specifications Page 50