Avaya Business Secure Router 252 Configuration - Basics Uživatelský manuál stáhnout pdf (Strana 174)

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174 Chapter 11 Firewall screens

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Figure 51 WAN to LAN traffic

Configuring firewall

Click FIREWALL to open the Summary screen. Enable (or activate) the firewall

by selecting the Enable Firewall check box as seen in Figure 52.

The Business Secure Router applies the firewall rules in order, starting from the

first rule for the direction of travel of a packet. When the traffic matches a rule, the

Business Secure Router takes the action in the rule and stops checking the firewall

rules.

For example, you have one general rule that blocks all LAN to WAN IRC

(Internet Relay Chat). And you have another rule that allows IRC traffic from

your company president’s LAN IP address to go to the WAN. In order for the

president’s IRC traffic to get through, the rule for the president’s IP address must

come before the rule that blocks all LAN to WAN IRC traffic. If the rule that

blocks all LAN to WAN IRC traffic comes first, all LAN to WAN IRC traffic

matches that rule and the Business Secure Router drops the president’s connection

and does not check any other firewall rules.

Business Secure Router

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