Transparent user identification makes a best effort to identify users without requesting credentials. It is not authentication. It should be used only when you are comfortable accepting a best effort at user identification.
Transparent user identification is supported in Secure Web Gateway (SWG) configurations for either explicit or transparent forward proxy. An agent obtains data and stores a mapping of IP addresses to user names in an IF-MAP server. An F5® DC Agent queries domain controllers. An F5 Logon Agent runs a script when a client logs in and can be configured to run a script when the client logs out.
In an access policy, a Transparent Identity Import item obtains the IP-address-to-username-mapping from the IF-MAP server. This item can be used alone for determining whether to grant access or be paired with another query to look up the user or validate user information.
To support this option, either the Secure Web Gateway F5 DC Agent or F5 Logon Agent must be downloaded, installed, and configured.
The F5® DC Agent enables transparent user identification, a best effort to identify users without requesting credentials.
How F5 DC Agent transparently identifies users
You can install the F5® DC Agent on a Windows-based server in any domain in the network. The F5 DC Agent discovers domains and domain controllers, queries the domain controllers for logon sessions, and sends an IP-address-to-user-name mapping to the BIG-IP® system. F5 DC Agent sends only those new user name and IP address pairs recorded since the previous query. The BIG-IP system maintains user identity information in an IF-MAP server and stores only the most recently identified user name for a given IP address.
You can install more than one F5 DC Agent in your network and configure F5 DC Agents to communicate with the same BIG-IP system.
|Number of users||Average amount of data transferred per day|
|250 users||30 KB|
|2,000 users||240 KB|
|10,000 users||1200 KB|
[WEST_DOMAIN] dcWEST1=on dcWEST2=on [EAST_DOMAIN] dcEAST1=on dcEAST2=on
Error messages from the F5® DC Agent display in the Event Viewer on the Windows-based server where DC Agent is installed.
|Error code||Error message||Possible causes|
|3||Could not configure DC Agent (Code 3)||An attempt was made to install F5 DC Agent using an account that does not have domain and local administrator privileges. As a result, some required files are not installed properly, and F5 DC Agent service cannot run.|
|5||ERROR_ACCESS_DENIED||F5 DC Agent service does not have sufficient permissions to perform required
tasks. This error can occur when:
|53||ERROR_BAD_NETPATH||A network problem prevents F5 DC Agent from contacting a domain controller. This
error can occur when:
System error while enumerating the domain controllers. domain: (****)ecode: 71 : message: No more connections can be made to this remote computer at this time because there are already as many connections as the computer can accept.
|The error results from F5 DC Agent automatic domain discovery process, used to identify new domains and domain controllers. It can also occur when F5 DC Agent tries to connect to a Windows XP-based computer that is broadcasting itself as the master browser for a non-company domain or workgroup. Although the issue might indicate a problem with connectivity to the domain controller, it is more likely that the domain is a workgroup with no domain controllers. This error can be ignored.|
|997||Error Code 997||An attempt was made to install F5 DC Agent using an account that does not have domain and local administrator privileges. As a result, some required files are not installed properly, and F5 DC Agent service cannot run.|
|1058||Error Code 1058||This error is seen on startup. A Local Security Policy on the Windows-based server might have disabled the F5 DC Agent service.|
The F5® Logon Agent enables transparent user identification, a best effort to identify users without requesting credentials.
You can install the F5 Logon Agent on a Windows-based server in any domain in the network. The F5 Logon Agent identifies users in real time when the users log on to domains, which prevents missing a user logon because of a query timing issue. F5 Logon Agent sends up-to-date session information to the BIG-IP® system.
You can install more than one F5 Logon Agent in your network, and configure F5 Logon Agents to communicate with the same BIG-IP system. If you have multiple BIG-IP systems, each BIG-IP system must be able to communicate with every F5 Logon Agent in your network.
This table explains the relevant files used by F5® Logon Agent after you install the installation file from the BIG-IP® system Configuration utility Welcome screen.
|Filename||File location||Additional information|
|LogonApp.exe||Stored in User Identity Agents > LogonApp > Windows folder.||Sends user information to F5 Logon Agent. Captures user logon sessions as they occur. Runs on Windows client machines.|
|logon.bat||Stored in User Identity Agents > LogonApp > Windows folder.||Invokes LogonApp.exe, which runs on client machines and captures logon sessions.|
|AuthServer.ini||Stored in User Identity Agents > config folder.||Contains one initialization parameter for Logon Agent.|
When you install the F5® Logon Agent, you must create a logon script for clients that identify the clients to the BIG-IP® system when they log on to a Windows domain. The application, LogonApp.exe, provides a username and IP address to F5 Logon Agent each time a Windows client connects to a Windows Active Directory or a Windows NT directory service.
When installing F5 Logon Agent, the following files are placed in the F5 Networks folder (by default, C:\Program Files\F5 Networks\User Identity Agents\LogonApp):
This table explains the relevant parameters used by a logon or logout script for F5® Logon Agent.
|<server>||The IP address of the BIG-IP® system F5 Logon Agent.|
|<port>||The port number used by F5 Logon Agent. The default value is 15880.|
|/COPY||Copies the logon application to the %USERPROFILE%\Local Settings\Temp directory on the user machine, where the logon script runs it from the local memory. This optional parameter helps prevent your logon script from hanging. COPY can be used only in persistent mode.|
|/VERBOSE||A debugging parameter that can be used only with help from technical support.|
|/LOGOUT||Used only in an optional logout script, this parameter removes the user's logon information from the F5 Logon Agent user map when the user logs off. If you use Active Directory, this parameter can clear the logon information from the user map before the interval that is defined for F5 Logon Agent has elapsed. Use this optional parameter in a logout script in a batch file that is different than the one containing the logon script. The following example logout script clears the logon information for each user as soon as the user logs out. LogonApp.exe http://10.2.2.95:15880 /NOPERSIST /LOGOUT|