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WR1500 4-Port Wireless DSL/Cable Router
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11.2.3 Stateful Inspection Firewalls
Stateful inspection fi rewalls restrict access by screening data packets against defi ned access
rules. They make access control decisions based on IP address and protocol. They also
“inspect” the session data to assure the integrity of the connection and to adapt to dynamic
protocols. These fi rewalls generally provide the best speed and transparency; however, they
may lack the granular application level access control or caching that some proxies support.
See section 11.5 for more information on Stateful Inspection.
Firewalls, of one type or another, have become an integral part of standard security solutions
for enterprises.
11.3 Introduction to ParkerVision’s Firewall
The WR1500 Wireless Router fi rewall is a stateful inspection fi rewall and is designed to
protect against Denial of Service attacks when activated (in SMT menu 21.2 or in the Web
Confi guration Utility). The WR1500 Wireless Router’s purpose is to allow a private Local Area
Network (LAN) to be securely connected to the Internet. The WR1500 Wireless Router can be
used to prevent theft, destruction and modifi cation of data, as well as log events, which may
be important to the security of your network. The WR1500 Wireless Router also has packet-
fi ltering capabilities.
11.4 Denial of Service
Denials of Service (DoS) attacks are aimed at devices and networks with a connection to the
Internet. Their goal is not to steal information, but to disable a device or network so users no
longer have access to network resources. The WR1500 Wireless Router is pre-confi gured to
automatically detect and thwart all known DoS attacks.