NBT Cache

System supports NetBIOS name resolution. With this function enabled, system can automatically obtain all the NetBIOS host names registered by the hosts within the managed network, and store them in the cache to provide IP address to NetBIOS host name query service for other modules.

Enabling a NetBIOS name resolver is the pre-requisition for displaying host names in traffic logs. For more information on how to display host names in the traffic logs, see hostname/username settings of Traffic Log.

To enable NetBIOS for a security zone, select the NBT cache check box when creating or editing the zone. For more details, see Configuring a Security Zone. The security zone with NetBIOS enabled should not be the zone that is connected to WAN. After NetBIOS is enabled, the query process might last for a while, and the query result will be added to the NetBIOS cache table. System will perform the query again periodically and update the result.

Note: Only when PCs have NetBIOS enabled can their host names be queried. For more information on how to enable NetBIOS, see the detailed instructions of your PC's Operating System.

To clear NBT cache, take the following steps:

1. On the Navigation pane, click Configure > Network > Network to visit the Network page.
2. On the Task tab in the right auxiliary pane, click DNS.
3. In the DNS List dialog, click the NBT Cache tab to display NBT cache information.
4. Select a NBT cache entry from the list and click Delete.