ZyXEL Communications ADSL VoIP IAD with 802.11g Wireless 2602HW Series Podręcznik Użytkownika Pobierz pdf (Strona 167)

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Prestige 2602HW Series User’s Guide

Chapter 13 Firewalls 167

• A range of source and destination IP addresses as well as port numbers can be specified

within one firewall rule making the firewall a better choice when complex rules are

required.

• To selectively block/allow inbound or outbound traffic between inside host/networks and

outside host/networks. Remember that filters can not distinguish traffic originating from

an inside host or an outside host by IP address.

• The firewall performs better than filtering if you need to check many rules.

• Use the firewall if you need routine e-mail reports about your system or need to be alerted

when attacks occur.

• The firewall can block specific URL traffic that might occur in the future. The URL can

be saved in an Access Control List (ACL) database.

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