Blocking unsecured networks
Network management, Unsecured Network, Wifi, Wireless in 2010, Wireless Network, Wireless network security, Wireless security
When I am scanning for wireless networks in my companies head quarters we see all sorts of unsecured outside networks. How can we prevent them from showing up and infiltrating our offices?
Software/Hardware used:
Software/Hardware used:
ASKED:
August 16, 2010 8:11 PM
UPDATED:
August 17, 2010 2:45 PM
Answer Wiki:
Build a metal cage (a Faraday cage) around your premises. A metal cage is a fairly standard way of blocking EM transmissions.
See, for example, <a href="http://howto.techworld.com/mobile-wireless/2767/can-faraday-cages-tame-wi-fi/">Can Faraday cages tame Wi-Fi?</a>
However, somehow it's hard to imagine that that's what you really want. It's rare that anyone cares if some other network is accessible from a given location. Usually the problem is reversed -- you don't want <i>your</i> network accessible from <i>other</i> locations. The solution for that is to enable and implement the network security functions provided for your Wi-Fi network. Exactly how that is done will depend on exactly what equipment and software you are using.
Or perhaps you're concerned about someone in your location connecting to some open external Wi-Fi network and later connecting back to your network. Potential malware might be imported through the "dual-connection" PC.
In that case, lock the PCs down so that only an Administrator can make networking changes on the PCs. The exact way to do that will again depend on exactly what equipment and software you are using. Most especially, each individual PC might need a slightly different procedure; many sites have a wide range of PC configurations. In addition, ensure that your AV solution is sufficient and properly updated. Other products for spy-ware, etc., might also need attention.
It might be best if you explained the <i>business problem</i> that you want to solve.
Tom
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It sounds like you are concerned with either interference from the other networks or those networks (users) getting into your network.
Both are actual risks. If the other networks are not configured on appropriate channels then there could be RF interference with your clients/access points. This will reduce the reliability of the connection for your users and services.
To keep unauthorized users off of your network, you need to ensure that you have fully secured your network with the appropriate client authentication/authorization and encryption. You might consider working with a local reseller who has significant experience with WLAN implementation and support to ensure that your systems/services are protected and implemented according to your business needs.