How do I setup a secure wireless environment for a small office that would also like to provide wifi for customers?

I have a small office with a secured wireless network. We would like to offer wireless access to our customers and keep it separate and secure it from our own network. What is the easiest way to accomplish this?
batchoAsked:
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HDSportster08Commented:
make a rule in the firewall to allow only a certain range of IP addresses.  After you do that you will have to assign those to the wireless device to hand out for DHCP addresses.
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acmpCommented:
If you have a firewall with DMZ then you can use a second AP to provide the visitor access.  Add it to the DMZ with a different IP range to your main network and deny access to your network from the DMZ but grant access to the Internet.

Just about anything else could let visitors onto your network.

If you can then turn off the visitor access when it is not needed.

If you have a few $ to spend then look at Ruckus WiFi.  It is designed for this application and each AP will support up to 6 independent networks.  

What you can do depends on your current network capabilities.  if you switch supports VLAN tagging then I'd go with Ruckus as you can properly segregate the visitor and main WiFi networks and have decent access controls so only authorised visitors can get onto your network.

I don't work for Ruckus, I have just implemented a corporate/guest WiFi network and my investigations showed that they provided the best solution (IMHO).
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