通过运用CISCO PIX 501配置adsl上网的实例:PIX Version 6.3(3)interface ethernet0 autointerface ethernet1 100fullnameif ethernet0 outside security0nameif ethernet1 inside security100enable password ayL3u8RfpSvxCtQo encryptedpasswd 2KFQnbNIdI.2KYOU encryptedhostname pixfirewallfixup protocol dns maximum-length 512fixup protocol ftp 21fixup protocol h323 h225 1720fixup protocol h323 ras 1718-1719fixup protocol http 80fixup protocol rsh 514fixup protocol rtsp 554fixup protocol sip 5060fixup protocol sip udp 5060fixup protocol skinny 2000fixup protocol smtp 25fixup protocol sqlnet 1521fixup protocol tftp 69namespager lines 24mtu outside 1500mtu inside 1500ip address outside pppoe setrouteip address inside 192.168.1.1 255.255.255.0ip audit info action alarmip audit attack action alarmpdm logging informational 100pdm history enablearp timeout 14400global (outside) 1 interfacenat (inside) 1 0.0.0.0 0.0.0.0 0 0timeout xlate 0:05:00timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h225 1:00:00timeout h323 0:05:00 mgcp 0:05:00 sip 0:30:00 sip_media 0:02:00timeout uauth 0:05:00 absoluteaaa-server TACACS+ protocol tacacs+aaa-server RADIUS protocol radiusaaa-server LOCAL protocol localhttp server enablehttp 192.168.1.0 255.255.255.0 insideno snmp-server locationno snmp-server contactsnmp-server community publicno snmp-server enable trapsfloodguard enabletelnet 192.168.1.0 255.255.255.0 insidetelnet timeout 5ssh timeout 5console timeout 0vpdn group adsl request dialout pppoevpdn group adsl localname ******** （ADSL的用户名）vpdn group adsl ppp authentication papvpdn username ******** password ********* （ADSL的用户名及密码）dhcpd address 192.168.1.2-192.168.1.33 insidedhcpd dns 168.95.1.1dhcpd lease 3600dhcpd ping_timeout 750dhcpd auto_config outsidedhcpd enable insideterminal width 80Cryptochecksum:e06b3ec597e4bdb9f5a6930d2512fdf5: end