Cisco 7604 Configuration Guide - Page 351
auth-prompt, uauth timeout 0, timeout uauth 0:0:1, access-list,
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Chapter 17 Applying AAA for Network Access Figure 17-1 Authentication Proxy Login Page Configuring Authentication for Network Access Note The Cisco Systems text field shown in this example was customized using the auth-prompt command. See the "Configuring Custom Login Prompts" section on page 17-5. After the user enters a valid username and password, an "Authentication Successful" page appears and closes automatically. If the user fails to enter a valid username and password, an "Authentication Failed" page appears. Secured web-client authentication has the following limitations: • A maximum of 128 concurrent HTTPS authentication sessions are allowed. If all 128 HTTPS authentication processes are running, a new connection requiring authentication will not succeed. • When uauth timeout 0 is configured (the uauth timeout is set to 0), HTTPS authentication might not work. If a browser initiates multiple TCP connections to load a web page after HTTPS authentication, the first connection is let through, but the subsequent connections trigger authentication. As a result, users are continuously presented with an authentication page, even if the correct username and password are entered each time. To work around this, set the uauth timeout to 1 second with the timeout uauth 0:0:1 command. However, this workaround opens a 1-second window of opportunity that might allow non-authenticated users to go through the firewall if they are coming from the same source IP address. • Because HTTPS authentication occurs on the SSL port 443, users must not configure an access-list command statement to block traffic from the HTTP client to HTTP server on port 443. Furthermore, if static PAT is configured for web traffic on port 80, it must also be configured for the SSL port. In the following example, the first line configures static PAT for web traffic and the second line must be added to support the HTTPS authentication configuration. static (inside,outside) tcp 10.132.16.200 www 10.130.16.10 www OL-20748-01 Catalyst 6500 Series Switch and Cisco 7600 Series Router Firewall Services Module Configuration Guide using ASDM 17-7
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