成功配置pix525通过adsl-pppoe上internet的经验,与各位分享
     希望对大家有点帮助。
     环境:pix525一台,标准配置,软件版本6.2。下端接了一台3550-12g。pix e0口通过猫接2M的adsl线路 pix配置如下:
     PIX Version 6.2(2)
     nameif ethernet0 outside security0
     nameif ethernet1 inside security100
     enable password 8Ry2YjIyt7RRXU24 encrypted
     passwd 2KFQnbNIdI.2KYOU encrypted
     hostname pix525
     fixup protocol ftp 21
     fixup protocol http 80
     fixup protocol h323 h225 1720
     fixup protocol h323 ras 1718-1719
     fixup protocol ils 389
     fixup protocol rsh 514
     fixup protocol rtsp 554
     fixup protocol smtp 25
     fixup protocol sqlnet 1521
     fixup protocol sip 5060
     fixup protocol skinny 2000
     names
     pager lines 24
     interface ethernet0 auto
     interface ethernet1 auto
     mtu outside 1500 虽然这里还是1500,但我用show查看e0,它的mtu自动变为1492
     mtu inside 1500
     ip address outside pppoe setroute
     ip address inside 10.249.178.2 255.255.254.0
     ip audit info action alarm
     ip audit attack action alarm
     no failover
     failover timeout 0:00:00
     failover poll 15
     failover ip address outside 0.0.0.0
     failover ip address inside 0.0.0.0
     pdm history enable
     arp timeout 14400
     global (outside) 1 interface 这两句是做nat
     nat (inside) 1 0.0.0.0 0.0.0.0 0 0
     route inside 10.249.0.0 255.255.0.0 10.249.178.254 1
     timeout xlate 3:00:00
     timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 rpc 0:10:00 h323 0:05:00 si
     p 0:30:00 sip_media 0:02:00
     timeout uauth 0:05:00 absolute
     aaa-server TACACS+ protocol tacacs+
     aaa-server RADIUS protocol radius
     aaa-server LOCAL protocol local
     no snmp-server location
     no snmp-server contact
     snmp-server community public
     no snmp-server enable traps
     floodguard enable
     no sysopt route dnat
     telnet 10.249.178.0 255.255.254.0 inside
     telnet timeout 5
     ssh timeout 5
     vpdn group pppoex request dialout pppoe
     vpdn group pppoex localname ××××××××× ---这里是isp给的登陆帐号,不能随便写哦~~
     vpdn group pppoex ppp authentication pap
     vpdn username ×××××× password *********
     terminal width 80
     Cryptochecksum:06508dbabd51c6745ef84d1567eb34cf
     : end