I'm looking for a solution/advice to our webauth WLAN. When a user connects, I want them to get a private IP. Once they hit the authentication page and logon, I want them to get a public IP. I have a lot of devices connected to the WLAN, but they're not authenticated. They're just occupying space in the dhcp pool.
I've been thinking about doing this with ACS, but wanted to know if there's any other alternatives.
Making one thing clear : if you want to change the ip address of the client, you're on the wrong track.
WLC webauth requires the client to already have an ip address. So you cannot change the client ip after he authenticated, otherwise he'll have to reauthenticate again.
How about natting ? I'm no natting expert, but wireless client traffic will only hit the network once they authenticated so then maybe you could do some dynamic natting to a public ip ?
Last thing : the behavior you are looking for might be offered by NAC where the client will start in a "untrusted" vlan which can only do webauth on clean access (not on the WLC due to the ip issue of point 1) and move to a trusted vlan after that.
That clears things up. I knew you could do it with 802.1x, makes sense because you don't get an IP til after your credentials are verified. With webauth, was wondering how you could do it without kicking the client offline.
I'll get with our cisco rep about the NAC. Was wondering if it could do something similar to what I want.
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