ccna 5-6 nat和pat

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1、AddressSpaceManagementScalingtheNetworkwithNATandPATNetworkAddressTranslationAnIPaddressiseitherlocalorglobal.LocalIPv4addressesareseenintheinsidenetwork.GlobalIPv4addressesareseenintheoutsidenetwork.PortAddressTranslationTranslatingInsideSourceAddressesEstablishesstatictranslationbetwe

2、enaninsidelocaladdressandaninsideglobaladdressRouterX(config)#ipnatinsidesourcestaticlocal-ipglobal-ipMarkstheinterfaceasconnectedtotheinsideRouterX(config-if)#ipnatinsideMarkstheinterfaceasconnectedtotheoutsideRouterX(config-if)#ipnatoutsideDisplaysactivetranslationsRouterX#showipnattra

3、nslationsConfiguringandVerifyingStaticTranslationEnablingStaticNATAddressMappingExampleRouterX#showipnattranslationsProInsideglobalInsidelocalOutsidelocalOutsideglobal---192.168.1.210.1.1.2------interfaces0ipaddress192.168.1.1255.255.255.0ipnatoutside!interfacee0ipaddress10.1.1.1255.25

4、5.255.0ipnatinside!ipnatinsidesourcestatic10.1.1.2192.168.1.2Establishesdynamicsourcetranslation,specifyingtheACLthatwasdefinedinthepreviousstepRouterX(config)#ipnatinsidesourcelistaccess-list-numberpoolnameDefinesapoolofglobaladdressestobeallocatedasneededRouterX(config)#ipnatpoolnames

5、tart-ipend-ip{netmasknetmask

6、prefix-lengthprefix-length}DefinesastandardIPACLpermittingthoseinsidelocaladdressesthataretobetranslatedRouterX(config)#access-listaccess-list-numberpermitsource[source-wildcard]DisplaysactivetranslationsRouterX#showipnattranslationsConfiguringandVerifyingDy

7、namicTranslationDynamicAddressTranslationExampleRouterX#showipnattranslationsProInsideglobalInsidelocalOutsidelocalOutsideglobal---171.69.233.209192.168.1.100---------171.69.233.210192.168.1.101------OverloadinganInsideGlobalAddressConfiguringOverloadingEstablishesdynamicsourcetranslati

8、on,specifyingtheACLthatwasdefinedinthepreviousstepRouterX(config)#ipnatinsidesourcelistaccess-list-numberinterfaceinterfaceoverloadDefinesastandardIPACLthatwillpermittheinsidelocaladdressesthataretobetranslatedRouterX(config)#access-listaccess-list-numberpermitsourcesou