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思科防火墙基本配置.ppt

2024-08-24

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防火墙访问模式Internet访问配置模式:configureterminal命令pixfirewall>help? enableTurnonprivilegedcommands exitExitthecurrentcommandmode loginLoginasaparticularuser logoutExitfromcurrentcommandmode,andto unprivilegedmode quitExitthecurrentcommandmode pixfirewall>helpenable USAGE: enable[<priv_level>] DESCRIPTION: enableTurnonprivilegedcommands查看和保存你的配置ClearingRunningConfigurationClearingStartupConfigurationReloadtheConfiguration:reloadCommandFileSystemDisplayingStoredFiles:SystemandConfigurationSelectingBootSystemFileVerifyingtheStartupSystemImageFunctionsoftheSecurityAppliance:SecurityAlgorithmSecurityLevelExampleAssigningHostnametoSecurityAppliance:ChangingtheCLIPromptBasicCLICommandsforSecurityAppliancesinterfacehardware_idnameifhardware_idif_nameipaddressip_address[netmask]DHCP-AssignedAddresssecurity-levelnumberspeed[hardware_speed] duplex[duplex_operation]management-only nomanagement-onlyNetworkAddressTranslationEnableNATControlnat[(if_name)]nat_idaddress[netmask][dns][[tcp]tcp_max_conns[emb_limit][norandomseq]]][udpudp_max_conns]globalCommandrouteif_nameip_addressnetmaskgateway_ip[metric]fw1(config)#names fw1(config)#name172.16.0.2bastionhost fw1(config)#name10.0.0.11insidehostConfigurationExampleConfigurationExample(Cont.)ConfigurationExample(Cont.)fw1#showinterface InterfaceGigabitEthernet0/0"outside",isup,lineprotocolisup Detected:Speed100Mbps,Full-duplex Requested:Auto MACaddress000b.fcf8.c538,MTU1500 IPaddress192.168.1.2,subnetmask255.255.255.0 0packetsinput,0bytes,0nobuffer Received0broadcasts,0runts,0giants 0inputerrors,0CRC,0frame,0overrun,0ignored,0abort 0packetsoutput,0bytes,0underruns inputqueue(curr/maxblocks):hardware(0/0)software(0/0) outputqueue(curr/maxblocks):hardware(0/0)software(0/0) Received0VLANuntaggedpackets,0bytes Transmitted0VLANuntaggedpackets,0bytes Dropped0VLANuntaggedpacketsfw1#showmemory Freememory:49046552bytes Usedmemory:18062312bytes ----------------------------- Totalmemory:67108864bytesfw1#showcpuusage CPUutilizationfor5seconds=0%;1mi

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