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DWS-4026
Руководство пользователя. Версия 2.0 Страница: 85

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [85/741] 172936

DenialofServiceProtection

D-Link UnifiedWiredandWirelessAccessSystem

November2011 Page85

D‐LinkUWSUserManual

•IfyouchangeanyoftheDoSsettings,clickSubmittoapplythechangestotheswitch.Topreservethe

changesacrossaswitchreboot,youmustperformasave.

Table17:DenialofServiceConfigurationFields

Field Description

DenialofServiceFirst

Fragment

Enableordisablethisoptionbyselectingthecorrespondinglineonthe

pulldownentryfield.EnablingFirstFr agmentDoSpreventioncausesthe

switchtodroppacketsthathaveaTCPheadersmallerthentheconfiguredMin

TCPHdrSize.Thefactorydefaultisdisabled.

DenialofServiceMinTCPHd

r

Size

SpecifytheMinTCPHdrSizeallowed.IfFirstFragmentDoSpreventionis

enabled,theswitchwill droppacketsthathavea TCPheadersmallerthenthis

configuredMinTCPHdrSize.Thefactorydefaultisdisabled.

DenialofServiceICMP Enableordisablethisoptionbyselectingthec

orrespondinglineonthe

pulldownentryfield.EnablingICMPDoSpreventioncausestheswitchtodrop

ICMPpacketsthathaveatypesettoECHO_REQ(ping)andasizegreaterthan

theconfiguredICMPPktSize.Thefactorydefaultisdisabled.

DenialofServiceMaxICMP

Size

SpecifytheMaxICMPPk

tSizeallowed.IfICMPDoSpreventionisenabled,the

switchwilldropICMPpingpacketsthathaveasizegreaterthanthisconfigured

MaxICMPPktSize.Thefactorydefaultisdisabled.

DenialofServiceL4Port Enableordisablethisoptionbyselectingthecorrespondinglineonthe

pulldownen

tryfield.EnablingL4PortDoSpreventioncausestheswitchto

droppacketsthathaveTCP /UDPsourceportequaltoTCP /UDPdestination

port.Thefactorydefaultisdisabled.

DenialofServiceSIP=DIP Enableordisablethisoptionbyselectingthecorrespondinglineonthe

pulldownentryfield.EnablingSIP=DIPDoSpreventioncau

sestheswitchto

droppacketsthathaveasourceIPaddressequaltothedestinationIPaddress.

Thefactorydefaultisdisabled.

DenialofServiceTCPFlag Enableordisablethisoptionbyselectingthecorrespondinglineonthe

pulldownentryfield.EnablingTCPFlagDoSpreventioncausestheswitchto

oppacketsthathaveTCPflagSYNsetandTCPsourceportlessthan1024or

TCPcontrolflagssetto0andTCPsequencenumbersetto0orTCPflagsFIN,

URG,andPSHsetandTCPsequencenumbersetto0orbothTCPflagsSYNand

FINset.Thefa

ctorydefaultisdisabled.

DenialofServiceTCP

Fragment

Enableordisablethisoptionbyselectingthecorrespondinglineonthe

pulldownentryfield.EnablingTCPFragmentDoSpreventioncausestheswitch

todroppacketsthathaveanIPfragmentoffsetequalto1.Thefactorydefault

isdisabled.

D-Link DWS-4026 Руководство пользователя. Версия 2.0 онлайн [85/741] 172936

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