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using Linksys WRT54G behind Guestgate Captive Portal

Posted on 2008-10-27
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Last Modified: 2012-05-05
On the advice of a "Master" here I bought a GuestGate captive portal. It looks like exactly what I need and I am thankful for the reccomendation but I am having trouble getting it to work the way I want. Guestgate will only support the device itself so they are not much help on this.

I know the device issues it's own range of IPs in a random fashion to ensure isolation between clients. When I plug directly into the device thats exactly what happens. But I need wireless connections to do the same thing. How do I force the linksys wrt54g to simply pass through the IPs given by the guestgate? The Linksys issues it's own DHCP but if I turn that off the the clients get nothing!
 I just want the Linksys to act like a wire. How?
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Question by:Salad-Dodger
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by:Kutyi
ID: 22819095
Turn off DHCP on the WRT54G, and if you using the the WRT54G as your router then that should be it, other then making sure the lan IP is on the same network as the GuestGate.  If you are using it only for WIFI access the do not connect anything the WAN port and only use the LAN port turning into essentially an Access Point only.
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by:Salad-Dodger
ID: 22819115
Isn't the Lan IP of the router a moving target since that comes from the captive portal? That thing throws out a 192.xxx IP one second and a 10.xxx IP the next to isolate the clients.
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by:Kutyi
ID: 22819132
Well in that case the IP of the WRT54G won't matter (only for managing the unit anyway), so long as the DHCP is shut off it won't interfer with the GuestGate device.  Keep in mind I have not used GuestGate, I us ip4net which does not randomize the IPs yet still isolates the traffic.
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by:Salad-Dodger
ID: 22819156
OK that was just too simple! It looks like it works! I was fighting to get it to work through the router instead of "around" it. Thank you.
I'll have a couple people try it tomorrow and then I'll give you the points.
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by:Kutyi
ID: 22819300
Glad to hear it's working.....:)
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Kutyi earned 500 total points
ID: 22847508
Hi Salad-Dodger:
Did you have success, if yes please close the question or state what issues you may still be having.
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Author Closing Comment

by:Salad-Dodger
ID: 31510625
I feel silly for how easy that was. It may not have been a 500 point question, but it was worth that to me! Thank you again.
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Expert Comment

by:Kutyi
ID: 22851123
Don't worry.  I have asked some in the past.  Sometimes we need a second opinion......:)
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