Cisco WLC Password recovery. Cisco WLC Password recovery. We have used controller 2. It can be done using two methods. Take the console access of WLC.
This document explains how Cisco implements web authentication and shows how to configure a Cisco 4400 Series Wireless LAN (WLAN) Controller (WLC) to support an Internal web authentication. This document assumes that you already have an initial configuration on the 4400 WLC. The information in this document is based on these software and hardware versions: • A 4400 series WLC that runs version 7.0.116.0 • Cisco Secure Access Control Server (ACS) version 4.2 installed on a Microsoft® Windows 2003 Server • Cisco Aironet 1131AG Series Light Weight Access Point • Cisco Aironet 802.11 a/b/g CardBus Wireless Adapter that runs version 4.0 The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration.
If your network is live, make sure that you understand the potential impact of any command. Uni En Iso 12100 Pdf To Jpg. Refer to for more information on document conventions. Web authentication is a Layer 3 security feature that causes the controller to not allow IP traffic (except DHCP and DNS -related packets) from a particular client until that client has correctly supplied a valid username and password. It is a simple Authentication method without the need for a supplicant or client utility.
Web authentication is typically used by customers who want to deploy a guest-access network. Typical deployments can include 'hot spot' locations such as T-Mobile or Starbucks. Keep in mind that web authentication does not provide data encryption. Web authentication is typically used as simple guest access for either a 'hot spot' or campus atmosphere where the only concern is the connectivity. Web authentication can be performed using: • Default login window on the WLC • Modified version of the default login window on the WLC • A customized login window that you configure on an external web server (External web authentication) • A customized login window that you download to the controller In this document, the Wireless LAN Controller for Internal web authentication is configured. This is what occurs when a user connects to a WLAN configured for web authentication: • The user opens a web browser and enters a URL, for example, The client sends out a DNS request for this URL to get the IP for the destination.
The WLC bypasses the DNS request to the DNS server and the DNS server responds back with a DNS reply, which contains the IP address of the destination www.cisco.com. This, in turn, is forwarded to the wireless clients. • The client then tries to open a TCP connection with the destination IP address. It sends out a TCP SYN packet destined to the IP address of www.cisco.com.
• The WLC has rules configured for the client and hence can act as a proxy for www.cisco.com. It sends back a TCP SYN-ACK packet to the client with source as the IP address of www.cisco.com. The client sends back a TCP ACK packet in order to complete the three way TCP handshake and the TCP connection is fully established. • The client sends an HTTP GET packet destined to www.cisco.com.
The WLC intercepts this packet and sends it for redirection handling. The HTTP application gateway prepares a HTML body and sends it back as the reply to the HTTP GET requested by the client. This HTML makes the client go to the default webpage URL of the WLC, for example, • The client closes the TCP connection with the IP address, for example, www.cisco.com.