Cisco Systems WRT54G3G-ST manual The Security Tab - Firewall, Block WAN Requests

Wireless-G Router for Mobile Broadband

The Security Tab - Firewall

Firewall

Firewall Protection. Enable this feature to employ Stateful Packet Inspection (SPI) for more detailed review of data packets entering your network environment.

Block WAN Requests

Block Anonymous Internet Requests. Use this feature to 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. Remove the checkmark 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. This feature is enabled by default. Remove the checkmark to disable this feature.

Filter Internet NAT Redirection. This feature uses port forwarding to block access to local servers from local networked computers. Click the checkbox to filter Internet NAT redirection, or remove the checkmark to disable this feature.

Filter IDENT (Port 113). This feature keeps port 113 from being scanned by devices outside of your local network. This feature is enabled by default. Remove the checkmark to disable this feature.

Change these settings as described here, and click the Save Settings button to apply your changes or Cancel Changes to cancel your changes.

Chapter 8: Configuring the Wireless-G Router for Mobile Broadband

Figure 8-30: Security Tab - Firewall

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The Security Tab - Firewall