4-1
1.1 November, 2009
Chapter 4
Firewall Protection and Content Filtering
This chapter describes how to use the content filtering features of the ProSafe VPN Firewall to
protect your network.
This chapter contains the following sections:
• “About Firewall Protection and Content Filtering” on page 4-1
• “Using Rules to Block or Allow Specific Kinds of Traffic” on page 4-2
• “Attack Checks” on page 4-19
• “Blocking Internet Sites (Content Filtering)” on page 4-21
• “Configuring Source MAC Filtering” on page 4-24
• “Configuring IP/MAC Address Binding Alerts” on page 4-26
• “Configuring Port Triggering” on page 4-27
• “Setting a Schedule to Block or Allow Specific Traffic” on page 4-29
• “Configuring a Bandwidth Profile” on page 4-30
• “Configuring Session Limits” on page 4-31
• “E-Mail Notifications of Event Logs and Alerts” on page 4-33
• “Administrator Tips” on page 4-33
About Firewall Protection and Content Filtering
The ProSafe VPN Firewall provides you with Web content filtering options, plus browsing
activity reporting and instant alerts via e-mail. Network administrators can establish restricted
access policies based on time-of-day, Web addresses and Web address keywords. You can also
block Internet access by applications and services, such as chat or games.
A firewall is a special category of router that protects one network (the “trusted” network, such as
your LAN) from another (the untrusted network, such as the Internet), while allowing
communication between the two. You can further segment keyword blocking to certain known
groups (see “Managing Groups and Hosts (LAN Groups)” on page 3-5 to set up LAN Groups).
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