Securing your Linksys WRT54G
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Wireless networks are becoming increasingly common due to the ease and cost of deployment of the LAN using wireless technologies. Wireless networks provide different challenges than wired networks, especially in securing data in transit between the client and the wireless access point. The common wireless standards, provide mechanisms for securing wireless data, and despite the limitations of the wireless, when the provided mechanisms are deployed and maintained in a systematic manner data can be secured against all but the most determined and patient attacker.
This paper describes security strategies for the Linksys Wireless Router, model WRT54G, Version 2. Specifically the WRT54G running firmware version 4.21.1. Other firmware versions and Linksys wireless products may have slight variances in functionality, but the general principles should apply.
This paper assumes the user is familiar with the Linksys web-based management interface, and how to use a web browser as well as basic wireless principles.
AP Isolation?
I was disappointed to see that this document didn't mention one outstanding security feature built into the Linksys WRT54G: AP Isolation.
AP Isolation creates a separate virtual network for your wireless network. When this feature is enabled, each of your wireless client will be in its own virtual network and will not be able to communicate with each other (they will however be able to communicate with the wired network). This is great for hotspots or when you want to eliminate the possibility of wireless clients attacking each other.
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