Enterasys RoamAbout 3000 Guia do Utilizador Página 189

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What’s Next?
RoamAbout Switch Manager User’s Guide 8-17
Rogue—RadiosusecountermeasuresagainstdevicesclassifiedbyMSSasrogues,butdo
notusecountermeasuresagainstdevicesclassifiedbyMSSasinterferingdevices.
Configured—Causesradiostoattackonlydevicesspecifiedintheattacklistonthe
RoamAboutSwitch(ondemandcountermeasures).Whenthisoptionisused,devices
foundtoberogues
byothermeans,suchaspolicyviolationsorbydeterminingthatthe
deviceisprovidingconnectivitytothewirednetwork,arenotattacked.
13. Todisableactivescanningforroguedevices,deselectEnableActiveScan.
Whenactivescanisenabled,radiossendprobeanyrequests(proberequestswithanullSSID
name),
tosolicitproberesponsesfromotheraccesspoints.Radiosalsopassivelyscanby
listeningforbeaconsandproberesponses.Whenactivescanisdisabled,radiosperform
passivescanningonly.
14. ClickFinishtosavethechangesandclosethewizard.
Verifying Countermeasures Are Being Taken Against the Rogue
Toverifythatcountermeasuresarebeingtakenagainsttherogue:
1. ClickontheAlarmsoptioninthemainRASMtoolbar.
2. Selecttherogueinthealarmlist.Thealarmdetailspanelfortherogueshowscountermeasure
activity.
Ifcountermeasuresstart,stop,andstartagain, theroguemayhaveleftthearea,then
returned,
oranotherAPinthecoverageareamayhavetakenovercountermeasureactivitiesfromthe
lastAPtodetecttherogue.
What’s Next?
Afteryouhavemanagedanyexistingfaults,youcancontinuetomonitoryournetwork.
•Forinformationaboutmonitoringyournetwork,referto“ManagingandMonitoringYour
Networkonpage 71.
Caution: Countermeasures affect wireless service on a radio. When an AP radio is
sending countermeasures, the radio is disabled for use by network traffic, until the radio
finishes sending the countermeasures.
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