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=PATH="/sbin:/usr/sbin:/usr/local/sbin";slaveIfs="1234678910";cmd="$1";[-z"$cmd"]&&cmd="start";case"$cmd"in"s.start)+Zbrctladdbrbr0;+Zbrctlstpbr0on;+Zbrctladdifbr0eth0;+Zbrctladdifbr0eth1;+Z(ifdowneth01>/dev/null2>&1;);+Z(ifdowneth11>/dev/null2>&1;);+Zifconfigeth00.0.0.0up;+Zifconfigeth10.0.0.0up;+Zifconfigbr010.0.3.129broadcast10.0.3.255netmask255.255.255.0up###Adapttoyourneeds.+Zrouteadddefaultgw10.0.3.129;###Adapttoyourneeds.+Zforfileinbr0eth0eth1;+Zdo5Yecho"1">/proc/sys/net/ipv4/conf/${file}/proxy_arp;color push BlackG color pop cps:SDict begin /product where{pop product(Distiller)search{pop pop pop version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show grestore}if}{pop}ifelse}{pop}ifelse}if end(b{color push Blackcolor push gray 0ps:SDict begin H.S endcolor push gray 0 color popps:SDict begin H.R endJps:SDict begin [ /View [/XYZ H.V] /Dest (page.9) cvn H.B /DEST pdfmark end color popG4.Pro9v\rareTilnuovoambientebridge!M9G color popKP덑5Yecho"1">/proc/sys/net/ipv4/conf/${file}/forwarding; =+Zdone;+Zecho"1">/proc/sys/net/ipv4/ip_forward;+Z;;"s.stop)+Zbrctldelifbr0eth0;+Zbrctldelifbr0eth1;+Zifconfigbr0down;+Zbrctldelbrbr0;+Z#ifupeth0;###Adapttoyourneeds.+Z#ifupeth1;###Adapttoyourneeds.+Z;;"s.restart,reload)+Z$0stop;+Zsleep3;+Z$0start;+Z;;esac;ؼEUUsi,losirendaeseguibile..卍color push Black color popcolor push Black color poproot@bridge:~>chmod700/etc/init.d/bridge.shDopGodiquesto,cisiassicuricheilbridgesopravvivqaariavviiinattesi. ux9XEcomepGeribackup: bisognaprovqarli primaUUchediventinonecessari.ps:SDict begin H.S endps:SDict begin 13.68 H.A endMps:SDict begin [ /View [/XYZ H.V] /Dest (section.4) cvn H.B /DEST pdfmark end4LProvareffilnuovoambientebridge! ps:SDict begin H.S endps:SDict begin 13.68 H.A endRps:SDict begin [ /View [/XYZ H.V] /Dest (subsection.4.1) cvn H.B /DEST pdfmark endS4.1Terrenodiprov@aNSiUUimmaginiunoscenariosimileaquesto:卍color push Black color popcolor push Black color pop+ /\H?Ethernet3rEthernetATMX/-/ s,\---------/?------------------/-/Y|| s,Box|----------|Bridge|----------|Router|-----|Inter- s,\---------/?------------------\ s,net---|CH^%̰^*F^^F\/CH|%̰|*F||K`\---/>̲eth0eth0Yeth1if0PR^CH|%̰|*F||U |5Y10.0.3.2,none/10.0.3.1Y195.137.15.7Xanythingelsen \*F/r$\!/color push BlackG color pop zps:SDict begin /product where{pop product(Distiller)search{pop pop pop version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show grestore}if}{pop}ifelse}{pop}ifelse}if end(b{color push Blackcolor push gray 0ps:SDict begin H.S endcolor push gray 0 color popps:SDict begin H.R endKps:SDict begin [ /View [/XYZ H.V] /Dest (page.10) cvn H.B /DEST pdfmark end color popG4.Pro9v\rareTilnuovoambientebridge!L10G color popKP덑',^K`\-br0-/ =',|D^=l^',|Y"^U |=l|',|Y"|U |=l|"s.ownPRownB&4foreign%̰hostilezӍIl\propriopGotere\amministrativosilimitaallemacchine\contrassegnateconown,^il\RouterGecompletamente o -limitsUUecosqpureInternet,naturalmente.SeUUsivuolecontrollareiltracodaepGerlaretesipuodeciderediintegrareun 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gureral'interfacciaeth0dellapropriamacchinacomed'abitudine.zLeinterfaccedelbridgesarannocon gurateUUcomedescrittonellasezionecolor push rgb 0 0 1ps:SDict begin H.S endcolor push rgb 0 0 13 color pop9ps:SDict begin H.R endops:SDict begin [ /Color [1 0 0] /H /I /Border [0 0 0] /Subtype /Link /Dest (section.3) cvn H.B /ANN pdfmark end color pop(Con gurazione).qSeUUsidesiderautilizzarel'inoltro(forwarding)sidovraeseguire:Vcolor push Black color popcolor push Black color poproot@bridge:~>echo"1">/proc/sys/net/ipv4/ip_forward =zԍOpzionalmenteUUsipGotracon gurareunadefaultroute:color push Black color popcolor push Black color poproot@bridge:~>routeadddefaultgw10.0.3.129zӍQuindiUUsiimpGosterannoalcuneregolediiptablessull'hostbridge:Vcolor push Black color popcolor push Black color poproot@bridge:~>iptables-PFORWARDDROProot@bridge:~>iptables-FFORWARDroot@bridge:~>iptables-IFORWARD-jACCEPTroot@bridge:~>iptables-IFORWARD-jLOGroot@bridge:~>iptables-IFORWARD-jDROProot@bridge:~>iptables-AFORWARD-jDROProot@bridge:~>iptables-x-v--line-numbers-LFORWARDL'ultimaUUlineagenerailseguenteoutput:color push BlackG color pop :ps:SDict begin /product where{pop product(Distiller)search{pop pop pop version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show grestore}if}{pop}ifelse}{pop}ifelse}if end(b{color push Blackcolor push gray 0ps:SDict begin H.S endcolor push gray 0 color popps:SDict begin H.R endKps:SDict begin [ /View [/XYZ H.V] /Dest (page.11) cvn H.B /DEST pdfmark end color popG4.Pro9v\rareTilnuovoambientebridge!L11G color popKP덍color push Black color popcolor push Black color popChainFORWARD(policyDROP0packets,0bytes) =numYpktsbytestarget,protoptinoutsourcedestination13r0%̰0DROP!all s,--anyXanyanywhereanywhere23r0%̰0LOGall s,--anyXanyanywhereanywhereYLOGlevelwarning33r0%̰0ACCEPTall s,--anyXanyanywhereanywhere43r0%̰0DROP!all s,--anyXanyanywhereanywhereؼIlRLOG'targetinseriscefaillogdituttiipacchettiattraversosyslogd.9AttenzionepGero,questof5Gedaintendersi aDsoloCscopGoditesting,inunambienteDdiproGduzionequestaregoladeveessererimossa.XAltrimentisirischiadiVriempireVi ledilogel'harddisk,[oppurechiunquepGotrebbeVusarequestosistemapGeruncausareunDenialUUofService.PerUUprovqareleregolesieseguaunpingversoilrouter(195.137.15.7)sull'hostbox:卍color push Black color popcolor push Black color poproot@box:~>ping-c3195.137.15.7 =PINGrouter.provider.net(195.137.15.7)from10.0.3.2:56(84)bytesofdata.---router.provider.netpingstatistics---3packetstransmitted,0received,100%loss,time2020ms^Croot@box:~>DidefaultvieneeseguitounDROPòsuognipacchetto.DNessunarispGosta,nessunpacchettoneilog.DQuesta con 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poproot@box:~>ping-c3195.137.15.7PINGrouter.provider.net(195.137.15.7)from10.0.3.2:56(84)bytesofdata.64bytesfromrouter.provider.net(195.137.15.7):icmp_seq=1ttl=255time=0.103ms64bytesfromrouter.provider.net(195.137.15.7):icmp_seq=2ttl=255time=0.082ms64bytesfromrouter.provider.net(195.137.15.7):icmp_seq=3ttl=255time=0.083mscolor push BlackG color pop ps:SDict begin /product where{pop product(Distiller)search{pop pop pop version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show grestore}if}{pop}ifelse}{pop}ifelse}if end(b{color push Blackcolor push gray 0ps:SDict begin H.S endcolor push gray 0 color popps:SDict begin H.R endKps:SDict begin [ /View [/XYZ H.V] /Dest (page.12) cvn H.B /DEST pdfmark end color popG4.Pro9v\rareTilnuovoambientebridge!L12G color popKP덑---router.provider.netpingstatistics--- =3packetstransmitted,3received,0%loss,time2002msrttmin/avg/max/mdev=0.082/0.089/0.103/0.012msroot@box:~>ؼYippGeah!qilUUrouter8Gevivoefunzionante.ؼcolor push BlackNotaTImpQortan9te: color popQuando5viene4attivqata,l'interfacciadelbridgeimpiegacirca30secondipGerdiventare5completamente opGerativqa.QQuesti30secondisonolafasediapprendimentodelbridge.QDurantequestotempGoilbridgeesegueo^untestpGero_stabilirequaliindirizziMACoWesistonosuqualipGorte.L'autoredelcoGdice,uLennert,dichiaranelsuoTODOcheladuratadellafasediapprendimentoverraoppGortunatamentediminuitaprimaUUopGoi.Siricordichedurantelafaseditest,nessunpacchettoattraverserailbridgeenessunpingsarapGossibile.ps:SDict begin H.S endps:SDict begin 13.68 H.A endRps:SDict begin [ /View [/XYZ H.V] /Dest (subsection.4.3) cvn H.B /DEST pdfmark end.4.3Con gurazioneAttualeNQuestasezionevuoleo rirealcunisuggerimentirelativiacomedovrebbGepresentarsiilsistemadopGoavereseguitoUUconsuccessoquantodescrittoinquestohowto.ps:SDict begin H.S endps:SDict begin 13.68 H.A endWps:SDict begin [ /View [/XYZ H.V] /Dest (subsubsection.4.3.1) cvn H.B /DEST pdfmark end4.3.1##Con gurazioneTdell'in9terfacciaNL'outputUUdiifconfigdovrebbGeesseresimilealseguente:卍color push Black color popcolor push Black color poproot@bridge:~>ifconfig =br0!Linkencap:Ethernet s,HWaddr00:04:75:81:D2:1DH?inetaddr:10.0.3.129 s,Bcast:195.30.198.255Mask:255.255.255.128H?UPBROADCASTRUNNINGMULTICAST s,MTU:1500Metric:1H?RXpackets:826errors:0dropped:0overruns:0frame:0H?TXpackets:737errors:0dropped:0overruns:0carrier:0H?collisions:0txqueuelen:0H?RXbytes:161180(157.4Kb) s,TXbytes:66708(65.1Kb)eth0YLinkencap:Ethernet s,HWaddr00:04:75:81:ED:B7H?UPBROADCASTRUNNINGMULTICAST s,MTU:1500Metric:1H?RXpackets:5729errors:0dropped:0overruns:0frame:0H?TXpackets:3115errors:0dropped:0overruns:0carrier:656H?collisions:0txqueuelen:100H?RXbytes:1922290(1.8Mb) s,TXbytes:298837(291.8Kb)H?Interrupt:11Baseaddress:0xe400eth1YLinkencap:Ethernet s,HWaddr00:04:75:81:D2:1DH?UPBROADCASTRUNNINGMULTICAST s,MTU:1500Metric:1H?RXpackets:0errors:0dropped:0overruns:1frame:0color push BlackG color pop 6ps:SDict begin /product where{pop product(Distiller)search{pop pop pop version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show grestore}if}{pop}ifelse}{pop}ifelse}if end(b{color push Blackcolor push gray 0ps:SDict begin H.S endcolor push gray 0 color popps:SDict begin H.R endKps:SDict begin [ /View [/XYZ H.V] /Dest (page.13) cvn H.B /DEST pdfmark end color popG4.Pro9v\rareTilnuovoambientebridge!L13G color popKP덑H?TXpackets:243errors:0dropped:0overruns:0carrier:0 =H?collisions:0txqueuelen:100H?RXbytes:342(342.0b) s,TXbytes:48379(47.2Kb)H?Interrupt:7Baseaddress:0xe800lo%̰Linkencap:LocalLoopbackH?inetaddr:127.0.0.1 s,Mask:255.0.0.0H?UPLOOPBACKRUNNING s,MTU:16436Metric:1H?RXpackets:1034errors:0dropped:0overruns:0frame:0H?TXpackets:1034errors:0dropped:0overruns:0carrier:0H?collisions:0txqueuelen:0H?RXbytes:82068(80.1Kb) s,TXbytes:82068(80.1Kb) 6ps:SDict begin H.S endps:SDict begin 13.68 H.A endWps:SDict begin [ /View [/XYZ H.V] /Dest (subsubsection.4.3.2) cvn H.B /DEST pdfmark endؼ4.3.2##Con gurazioneTdelRoutingNL'outputUUdelpropriocomandoroutedovrebbGeassomigliarea:卍color push Black color popcolor push Black color poproot@bridge:~>route-nKernelIProutingtableDestinationGateway*FGenmaskFlagsMetricRefXUseIface10.0.3.129Y0.0.0.0*F255.255.255.128U00%̰0br00.0.0.0*F10.0.3.129Y0.0.0.0UGX00%̰0br0root@bridge:~>ps:SDict begin H.S endps:SDict begin 13.68 H.A endWps:SDict begin [ /View [/XYZ H.V] /Dest (subsubsection.4.3.3) cvn H.B /DEST pdfmark endؼ4.3.3##Con gurazioneTdiIptablesNSiUUleggalasezionecolor push rgb 0 0 1ps:SDict begin H.S endcolor push rgb 0 0 14.2 color pop 9ps:SDict begin H.R end tps:SDict begin [ /Color [1 0 0] /H /I /Border [0 0 0] /Subtype /Link /Dest (subsection.4.2) cvn H.B /ANN pdfmark end color pop(PingaloJim!).~6ps:SDict begin H.S endps:SDict begin 13.68 H.A endRps:SDict begin [ /View [/XYZ H.V] /Dest (subsection.4.4) cvn H.B /DEST pdfmark endj4.4Nota nale(Imp`ortante!)MiUUpiacerebbGeavereUUvostrenotizie!q:-) AveteUUgraditoilviaggio?ViUUmancaqualcosa?AveteUUbisognodiaiuto?q(ChiedetealvostroassistenteloGcale;-)oppurertfm.SieteUUancoraonline?qAlloramandatemiunmessaggioviaemail.Mifaracontento.V*oleteUUmandarmiunassegno?qPerfavorenonpGossoaccettarli..q(Stoscherzando;)DateUUvqalorealmiotempGo,semplicementemandatemiqualchebGellaparola,8Gesuciente.NienteUUmotivqadipiGudeipartecipantifelicichetidannofeedbackpGositivi.PerUUcui,forza,spGendeteunminutoescrivetemiunemail!Grazie!卍color push Black color popcolor push Black color popNils =color push BlackG color popps:SDict begin /product where{pop product(Distiller)search{pop pop pop version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show grestore}if}{pop}ifelse}{pop}ifelse}if end(b{color push Blackcolor push gray 0ps:SDict begin H.S endcolor push gray 0 color popps:SDict begin H.R endKps:SDict begin [ /View [/XYZ H.V] /Dest (page.14) cvn H.B /DEST pdfmark end color popG5.EspQerienzeTdegliuten9tiF}14G color popKPps:SDict begin H.S endps:SDict begin 13.68 H.A endRps:SDict begin [ /View [/XYZ H.V] /Dest (subsection.4.5) cvn H.B /DEST pdfmark end 4.5Bug-NotesNPareUUvisiaunbugnelcoGdicedelbr-nf:卍color push Black color popcolor push Black color popFrom:BartDeSchuymer =Date:Sun,1Sep200221:52:46+0200To:NilsRadtkeSubject:Re:Ethernet-Brigde-netfilter-HOWTOCiaoNils,[...]Inoltre,ildebuggingdelfiltraggiodeipacchetticonlapatchbr-nfFjeingeneraleunacattivaidea.Possonoesseresegnalatimoltifalsiavvisi(relativiapresuntibug)neilog.[...]ؼPersonalmente'nonho'mairiscontratofalsipGositivineimieilog.F*orseilbugGestatocorretto.A'xquesto propGositoUUBarthascritto:color push Black color popcolor push Black color popFrom:BartDeSchuymerDate:Mon,2Sep200218:30:25+0200To:NilsRadtkeSubject:Re:Ethernet-Brigde-netfilter-HOWTOOnMonday02September200200:39,NilsRadtkewrote:>Larevisionedelcodicenf-debugnelbr-nfsarFjamigliorata?DevoammetteredinonaverpiFjufattogirarealcunkernelconilnetfilterdebuggingattivoultimamente.Disicuroqualchemesefageneravadeifalsipositivi(lamailinglistsulbridgecontienediversipostsuquestoproblema),miFjemancatoiltempodicapireilmotivoeseaccadeancora.`Enellamialistadellecosedafare.[...]ؼMa(alladataattuale,19-09-2002)nonhotrovqatounannuncioucialechesegnalasselachiusuradelbug. SiRcontrolliScostantementelaScolor push rgb 0 0 1ps:SDict begin H.S endcolor push rgb 0 0 16.1 color pop 9ps:SDict begin H.R end tps:SDict begin [ /Color [1 0 0] /H /I /Border [0 0 0] /Subtype /Link /Dest (subsection.6.1) cvn H.B /ANN pdfmark end color pop(ethernetbridgemailinglist)sesi6Geinteressatiallarisoluzionedelproblema.ps:SDict begin H.S endps:SDict begin 13.68 H.A endMps:SDict begin [ /View [/XYZ H.V] /Dest (section.5) cvn H.B /DEST pdfmark end/ƍ5LEsps3erienzeffdegliutenti ps:SDict begin H.S endps:SDict begin 13.68 H.A endRps:SDict begin [ /View [/XYZ H.V] /Dest (subsection.5.1) cvn H.B /DEST pdfmark endS5.1FedoraCore3NJamesUUDinkel(jdinkelff@ffgmail.com)UUhascrittoMartedi,8Mar200510:59:22-0600:color push BlackG color pop ps:SDict begin /product where{pop product(Distiller)search{pop pop pop version(.)search{exch pop exch pop(3011)eq{gsave newpath 0 0 moveto closepath clip/Courier findfont 10 scalefont setfont 72 72 moveto(.)show grestore}if}{pop}ifelse}{pop}ifelse}if end(b{color push Blackcolor push gray 0ps:SDict begin H.S endcolor push gray 0 color popps:SDict begin H.R endKps:SDict begin [ /View [/XYZ H.V] /Dest (page.15) cvn H.B /DEST pdfmark end color popG6.Links²15G color popKP덍color push Black color popcolor push Black color pop[...] =StousandoFedoraCore3etuttoquellochehodovutofareFjestato"yuminstallbridge-utils"perutilizzareilcomandobrctl.Nonhodovutofarenessunaricompilazionedelkerneloconfigurazioniogiochetticonimodulidelkernel.E'statomoltofacile.[...]ps:SDict begin H.S endps:SDict begin 13.68 H.A endMps:SDict begin [ /View [/XYZ H.V] /Dest (section.6) cvn H.B /DEST pdfmark endƍ6LLinks׍L'autoreUUdell'howtopuoesserecontattatoviae-mail. HomepageUUdell'autore.ps:SDict begin H.S endps:SDict begin 13.68 H.A endRps:SDict begin [ /View [/XYZ H.V] /Dest (subsection.6.1) cvn H.B /DEST pdfmark end.6.1Ethernet-Bridge#hcolor push Black color popEthernet?BridgeMailinglistcolor push Black color popUtilitaUUspazioutente,patch,ecc.:qǿHome?ofLinuxkernelEthernetBridgecolor push Black color popBridge-STP-HOWTOcolor push Black color popFirewalling?forFree,ShawnGrimes7ps:SDict begin H.S endps:SDict begin 13.68 H.A endRps:SDict begin [ /View [/XYZ H.V] /Dest (subsection.6.2) cvn H.B /DEST pdfmark end熍6.2Argomenticorrelati:color push Black color popFiltraggioUUdeipacchetti,Ethernet-Bridging-T*ables: ebtables,?sourceforgeebtables,?caratteristichesupportateebtables,?esempi: base,avanzaticolor push Black color popIPUUmoGde,estensioneLinuxBridge:qǿIP?mode,LVScolor push Black color popLinuxUUinambientiHigh-Avqailability:qǿHigh-Availability?Linuxcolor push Black color popLinuxUUVirtualServer:qǿLVScolor push BlackG color pop;(G߆T cmtt12ߤN cmtt9N cmbx12': cmti10