The Security Tab - Firewall; Figure 5-28: Security Tab - Firewall - Linksys WRH54G User Manual

Wireless-G Home Router

The Security Tab - Firewall

You can enable or disable the firewall, select filters to block specific Internet data types, and block anonymous
Internet requests. Use these features to enhance the security of your network.
Firewall Protection. This feature employs Stateful Packet Inspection (SPI) for a more detailed review of data
packets entering your network environment.
Additional Filters
Filter Proxy. Use of WAN proxy servers may compromise the device's security. Denying Filter Proxy will disable
access to any WAN proxy servers. Select to enable proxy filtering, or deselect to disable this feature.

Figure 5-28: Security Tab - Firewall

Filter Cookies. A cookie is data stored on your computer and used by Internet sites when you interact with them.
Select to enable cookie filtering, or deselect to disable this feature.
Filter Java Applets. Java is a programming language for websites. If you deny Java Applets, you run the risk of
not having access to Internet sites created using this programming language. Select to enable Java Applet
filtering, or deselect to disable this feature.
Filter ActiveX. ActiveX is a programming language for websites. If you deny ActiveX, you run the risk of not
having access to Internet sites created using this programming language. Select to enable ActiveX filtering, or
deselect to disable this feature.
Block WAN Requests
Block WAN Requests. Enable the Block WAN Request feature by checking the box beside Block Anonymous
Internet Requests and you can prevent your network from being pinged, or detected, by other Internet users.The
Block WAN Request feature also reinforces your network security by hiding your network ports. Both functions of
the Block WAN Request feature make it more difficult for outside users to work their way into your network. This
feature is enabled by default. Deselect to allow anonymous Internet requests.
Filter Multicast. Multicasting allows for multiple transmissions to specific recipients at the same time. If
multicasting is permitted, then the Router will allow IP multicast packets to be forwarded to the appropriate
computers. Select to filter multicasting, or Deselect to disable this feature.
Filter Internet NAT Redirection. This feature uses port forwarding to block access to local servers from local
networked computers. Select to filter Internet NAT redirection, or Deselect to disable this feature.
Filter IDENT (Port 113). This feature keeps port 113 from being scanned by devices outside of your local
network. Select to filter port 113, or Deselect to disable this feature.
Chapter 5: Configuring the Wireless-G Home Router 28
The Security Tab - Firewall