What is the use of pre-authentication access control lists (ACLs) in Wireless LAN Controllers (WLCs)?
A. Pre-authentication ACLs are normally implemented with Web authentication on 2000 Series controllers. Normally, no traffic from the user is allowed to pass through the WLC until the client authenticates successfully with the WLC. With pre-authentication ACL, as the name implies, you can allow client traffic to and from a specific IP address even before the client authenticates. This helps to forward the client traffic to the External Web Authentication server (external to the WLC network), which is used to authenticate the user in the Web authentication process. For more information about how to configure a pre-authentication ACL, refer to the Create a Preauthentication ACL section of the External Web Authentication with Wireless LAN Controllers Configuration Example. You need not configure pre-authentication ACLs on the 4400 Series WLC. Q. I have a MAC-filtered WLAN and a completely open WLAN in my network. Does the client choose the open WLAN by default? Or does the client automati
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