Synaccess-networks NP-0801DTM Manuale Utente Scaricare il pdf (Pagina 260)

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ENHANCEDIPSTACKEXTENSIONAT

COMMA

NDS

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HSPA+ATCommandsReferenceGuide 260

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2

Removeallchains(DROPeverything);<ip_addr>and<net_mask>hasnomeaning

inthiscase.

<ip_addr>

Stringtype,remoteaddresstobeaddedintotheACCEPTchain.Canbeanyvalid

IPaddressintheformat:xxx.xxx.xxx.xxx.

<net_mask>

Stringtype,masktobeappliedonthe<ip_addr>.CanbeanyvalidIPaddress

maskinth

eformat:xxx.xxx.xxx.xxx.

 CommandreturnsOKresultcodeifsuccessful.

Note:Thefirewallappliesforincoming(listening)connectionsonly.

FirewallgeneralpolicyisDROP,thereforeallpacketsthatarenotincludedintoan

ACCEPTchainruleissilentlydiscarded.

WhenapacketcomesfromtheIPa

ddressincoming_IP,thefirewallchainrules

arescannedformatchingwiththefollowingcriteria:

incoming_IP&<net_mask>=<ip_addr>&<net_mask>

Ifcriteriaismatched,thenthepacketisacceptedandtherulescanisfinished.If

criteriaisnotmatchedforanychainthepacketissilentlydropped.

Notes

 Foroutgoingconnectionsmadewith#SKTDtheremotehostisdynamicallyinsertedintotheACCEPTchainfor

theentireconnectionduration.Thereforethe#FRWLcommandisusedonlyfordefiningthe#SKTLbehavior,

decidingwhichhostsareallowedtoconnecttothelocaldevice.

 Rulesarenotsavedinnon‐volatilememory.Atstartuptheruleslistisempty.

 YoumustissuethiscommandbeforeestablishingadataconnectionusingtheAT#SGACTcommand.

Examples

ToacceptconnectionsonlyfromdevicesthatareontheIPaddressesrangingfrom197.158.1.1to

197.158.255.255,addthefollowingchaintothefirewall:

AT#FRWL=1,"197.158.1.1","255.255.0.0"

GPRSDataVolume#GDATAVOL 

Executecommandreports,foreveryactivePDPcontext,theamountofdatathelastGPRSsession(andthelast

GSMsession,ifGSMcontextisactive)receivedandtransmitted,oritreportsthetotalamountofdatareceived

andtransmittedduringallpastGPRS(andGSM)sessions,sincelastreset.

Testcomman

dreturnstherangeofsupportedvaluesforparameter<mode>.

Syntax

Command Commandtype

AT#GDATAVOL=[<mode>] Execute

AT#GDATAVOL=? Test

ParametersandValues

<mode> 

0

ResetstheGPRSdatacounterforthealltheavailablePDPcontexts(1‐5)andGSM

datacounterforGSMcontext0.

1

ReportsthelastGPRSsessiondatacounterfortheallthesetPDPcontexts—that

is,allthePDPcontextswithAPNparametersetusing+CGDCONT.

AlsoreportsthelastGSMsessiondataco

unterfortheGSMcontext,ifset

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Synaccess-networks NP-0801DTM Manuale Utente Pagina 260

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