Cisco Cisco Web Security Appliance S360 User Guide

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Chapter 26      System Administration
Administering User Accounts
26-18
Cisco IronPort AsyncOS 7.0 for Web User Guide
OL-23079-01
 shows where you enable external authentication on the System 
Administration > Users page.
Figure 26-9
Enabling External Authentication
You can configure the appliance to contact multiple external servers for 
authentication. You might want to define multiple external servers to allow for 
failover in case one server is temporarily unavailable. When you define multiple 
external servers, the appliance connects to the servers in the order defined on the 
appliance.
When external authentication is enabled and a user logs into the Web Security 
appliance, the appliance first determines if the user is the system defined “admin” 
account. If not, then the appliance checks the first configured external server to 
determine if the user is defined there. If the appliance cannot connect to the first 
external server, the appliance checks the next external server in the list. If the user 
fails authentication on any external server, the appliance tries to authenticate the 
user as a local user defined on the Web Security appliance. If the user does not 
exist on any external server or on the appliance, or if the user enters the wrong 
password, access to the appliance is denied.
Consider the following rules and guidelines when using external authentication:
  •
AsyncOS for Web connects to the external server over the M1 interface only.
  •
The Web Security appliance assigns all users in the RADIUS directory to the 
administrator user group. You cannot assign users to other user groups. When 
external authentication is enabled and a user successfully authenticates as a 
local user, the local user has Administrator user group privileges regardless 
of the configured user type.
  •
Any user with a valid username and password in the RADIUS directory is 
granted full access as an administrator on the Web Security appliance. No 
authorization is performed on RADIUS users. 
To enable external authentication using RADIUS:
Step 1
On the System Administration > Users page, click Enable.
The Edit External Authentication page is displayed.