McAfee Data Loss Prevention 9.2.2 Product Guide

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13Managing McAfee DLP systemsConfigure McAfee DLP devices3 Click Configure.4 In the Capture Interfaces section, select link speeds for each capture interface from the Speed and Duplexmenus.5 Click Update.A notification message appears to verify the change.Setting wiping policiesWiping policies set the standard for usage of disk space on the McAfee DLP appliances. You can wipecaptured data depending on how much space is used, or at fixed time intervals.Wiping policies are set on the System Configuration page, which is accessible from the Configure link of eachregistered device.Wiping policy typesSpace‐based wiping is the default policy. It erases the earliest results after 80 percent of the disk isused. When that threshold is reached, the system erases data to the 70 percent watermark.Time‐based wiping is configurable from 30 to 180 days.Manage McAfee DLP appliance disk spaceMcAfee DLP appliance disk space varies from 0.5 to 10TB, depending on whether legacy or Intelappliances are used, and the configuration of each device. You can determine disk space by retrievingdisk usage information on the appliances registered to McAfee DLP Manager.The Reconnex file system (RFS) divides the McAfee DLP Monitor disk into partitions. Capture partitionshold all the content captured, which is organized by type. Non‐capture partitions contain the operatingsystem and the results partitions (A‐Z), which fill sequentially.The capacity of the capture partitions in the Intel Server System SR2612SR is 7.2TB (across 12 disks).Task1 Select one of these options:• In ePolicy Orchestrator, select Menu | Data Loss Prevention | DLP Sys Config | System Administration |Devices.• On your McAfee DLP appliance, select System | System Administration | Devices.2 In the Advanced column, click More for a specific device.3 Scroll down to Application Information.4 Click Disk usage.The show_rfs_df command runs, and the results are displayed on the page that opens.248 McAfee Data Loss Prevention 9.2.2 Product Guide
Managing McAfee DLP systemsUsing capture filters 13Using capture filtersMcAfee DLP Monitor indexes all content moving over the network, but you can use capture filters tofilter out large portions of network traffic that do not require analysis by the capture engine.Filtering network data can cut down on the vast amounts of data captured and analyzed, so it isimportant to tune the system using capture filters when it is set up. When deployed, capture filtersconstrain the network data stream by recognizing only the most significant data for investigation, andas a result, performance is enhanced.You can also use capture filters to store critical sessions and applications‐level data.When the capture engine captures and indexes all TCP/IP traffic, it is broken down into content types.Anything that cannot be identified is tagged Unknown.ContentsTypical scenariosHow content capture filters workHow network capture filters workTypes of capture filtersAdd content capture filtersAdd network capture filtersCopy capture filtersDeploy capture filtersView deployed capture filtersRemove deployed capture filtersReprioritize capture filtersModify capture filtersTypical scenariosUse the following use cases to get a general understanding of how capture filters can be used tocontrol the data recognized by the capture engine.Tasks• Filter out traffic using common IP addresses on page 249Filter out portions of traffic using one or more IP addresses that comprise a large portion ofyour network traffic. Drop or store that data to reveal more significant traffic.• Manage data capture with network capture filters on page 250Manage data capture using multiple capture filters that instruct the capture engine toignore successive levels of traffic, while making an exception for a subset of traffic within adefined flow. You can use port numbers to filter specific types of traffic.• Exempt users from detection on page 251Even network administrators might not be privileged to peruse certain information found innetwork data streams.Filter out traffic using common IP addressesFilter out portions of traffic using one or more IP addresses that comprise a large portion of yournetwork traffic. Drop or store that data to reveal more significant traffic.For example, you might drop specific IP addresses that are well‐known within your intranet, a range ofaddresses, or all addresses on a subnet. These addresses, also known as elements, will be removedfrom consideration by the capture engine. In addition, you might expand drop all of the sessionscontaining those elements, or you might opt to store only the metadata defining them.McAfee Data Loss Prevention 9.2.2 Product Guide 249
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