IP协议号IP首部中有8位协议号，用于指明IP的上层协议。0HOPOPTIPv6逐跳选项1ICMPInternet控制消息2IGMPInternet组管理3GGP网关对网关4IPIP中的IP（封装）5ST流6TCP传输控制7CBTCBT8EGP外部网关协议9IGP任何专用内部网关（Cisco将其用于IGRP）10BBN-RCC-MONBBNRCC监视11NVP-II网络语音协议12PUPPUP13
ASAVersion7.2(4)!hostnamewlgs-outsidedomain-namewlgs-outside.comenablepasswordtsjKg7JHkl3qMaXKencryptedpasswdtsjKg7JHkl3qMaXKencryptednamesdns-guard!interfaceGigabitEthernet0/0nameifoutsidesecurity-le
ASAVersion7.0(6)!hostnameciscoasadomain-nameciscoasa.comenablepassword2KFQnbNIdI.2KYOUencryptednamesdns-guard!interfaceEthernet0/0nameifoutsidesecurity-level0ipaddress111.111.107.201255.255.255.192!in
PIXVersion6.3(4)interfaceethernet0autointerfaceethernet1autonameifethernet0outsidesecurity0nameifethernet1insidesecurity100enablepassword2KFQnbNIdI.2KYOUencryptedpasswd2KFQnbNIdI.2KYOUencryptedhostnam
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