Over the years I have always been reluctant to endorse or install wireless networks for clients, but who am I fooling as I set in my neighborhood coffee shop and begin this post? Wireless networking is fact of life for all of us, so let’s be clear that the primary issue with wireless networks is always security. Wireless network security has two major points of vulnerability: 1. Laptop vulnerability in open networks and 2. Securing wireless access points (wireless routers).

Whether your workstation is wired or wireless it can always be a target for hackers or malicious malware (viruses, Trojans, worms, etc.). All networks should have a physical/hardware firewall separating the network computers from the Internet. Depending on the level of sophistication, the firewall can not only provide separate private addresses for the local network, thus separating the local network from internet, but more sophisticated firewalls can also control or limit the type of inbound and outbound traffic. In many coffee shops and open networks there is no access control except network address translation (NAT) to provide private addresses for multiple machines which allows them to access the internet using one internet connection. This is done to accommodate all wireless users that may come in wanting to use the wireless internet.  Some “hot spots” require a web interface logon which may require an additional paid access or some kind of acknowledgment (room number or agreement) which may mean that remote access is better controlled with increased security. In addition, some of these locations may limit remote access Virtual Private Networking (VPN) or remote desktop access (RDP) allowing only web based email or Remote Web Workplace connections. In that case, however, the security is increased.

On the other hand, you are at the local neighborhood coffee shop and what do you do?

Install a personal firewall! The following links provide a list of current personal firewalls including several that are free: http://www.firewallguide.com/software.htm#Top_Picks and http://personal-firewall-software-review.toptenreviews.com/. I don’t make any recommendations because other than intrusion defense the various models work differently. Some are configured automatically (my favorite) while others are more technical; if you don’t know what SMB or ICMP means, work with the more easily managed applications.

As stated earlier, I believe all sites whether office or home should always have a physical firewall in place and wireless routers can also serve that purpose. Note that the range can be varied both in function and cost; recently one of the professional magazines to which I subscribe gave a list of 5 quality WLAN (Wireless Local Access Network) adapters: http://www.channelpro-digital.com/channelpro/201009?folio=20#pg22. Take time to do a little research about the appliance you want to buy; besides being rated for bandwidth speed, I recommend that the appliance have a web interface that you can understand and if you are using virtual private networking to access a site make sure that its firewall can be configurable and that it allows VPN pass through. When I encounter a router that I’m not familiar with, I go to the manufacturer site and look at the user manual and view not only technical specs but also how to configure the router for my clients.

Finding the right wireless adapter/access point is only part of the issue when setting up a wireless network. Almost all of the consumer grade products come ready to go, just plug it in and you can reach the internet. Although this can make life simple, an open network is an invitation to trouble; therefore the next step, configure encrypted wireless access. Did you look at how to configure wireless security when you reviewed the user manual? Use WPA (Wi-Fi Protected Access) encrypted security. We aren’t a how to site but take a look at Brian Posey’s evolving discussion regarding Wi-Fi vulnerabilities and how to secure your home or office network: http://www.windowsnetworking.com/articles_tutorials/Securing-Wireless-Network-Traffic-Part1.html. Wireless networks are a fact of all of our lives but there are risks; please play heads up ball.