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ProSafe Quad WAN Gigabit Firewall FR538G Reference Manual
1-2 Introduction
v1.0, November 2007
Quad WAN Ports for Increased Reliability or Outbound Load
Balancing
The FR538G has four broadband WAN ports (WAN1, WAN2, WAN3 and WAN4) capable of
operating independently at speeds of 10 MBps, 100 Mbps or 1G. The four WAN ports let you
connect a second broadband Internet line that can be configured on a mutually-exclusive basis to:
• Provide backup and rollover if one line is inoperable, ensuring you are never disconnected.
• Load balance, or use four Internet lines simultaneously for the outgoing traffic. The firewall
balances users between the four lines for maximum bandwidth efficiency.
See “Network Planning for Quad WAN Ports” on page D-1 for the planning factors to consider
when implementing the following capabilities with quad WAN port gateways:
• Single or multiple exposed hosts
A Powerful, True Firewall with Content Filtering
Unlike simple Internet sharing NAT routers, the FR538G is a true firewall, using stateful packet
inspection to defend against hacker attacks. Its firewall features include:
• DoS protection. Automatically detects and thwarts DoS attacks such as Ping of Death, SYN
Flood, LAND Attack, and IP Spoofing.
• Secure Firewall . Blocks unwanted traffic from the Internet to your LAN.
• Block Sites. Blocks access from your LAN to Internet locations or services that you specify as
off-limits.
• Logs security incidents. The FR538G will log security events such as blocked incoming
traffic, port scans, attacks, and administrator logins. You can configure the firewall to email
the log to you at specified intervals. You can also configure the firewall to send immediate
alert messages to your email address or email pager whenever a significant event occurs.
• Keyword Filtering. With its URL keyword filtering feature, the FR538G prevents
objectionable content from reaching your PCs. The firewall allows you to control access to
Internet content by screening for keywords within Web addresses. You can configure the
firewall to log and report attempts to access objectionable Internet sites.
Security Features
The quad WAN gigabit firewall is equipped with several features designed to maintain security, as
described in this section.