cisco 2811 怎麽做公網IP映射到內網IP呢？
R1：FastEthernet0/0? 222.1.1.1
FastEthernet0/1? 192.168.2.254C1 IP：192.168.2.200
R2：FastEthernet0/0? 222.1.1.2
Loopback0? 8.1.1.1R1 上的配置：
interface FastEthernet0/0
ip address 222.1.1.1 255.255.255.0 ip nat outside 註意接外網的接口用outside duplex auto speed auto!
interface FastEthernet0/1
ip address 192.168.2.254 255.255.255.0 ip nat inside接內網的接口用Inside duplex auto speed auto!
ip nat pool servers 222.1.1.10 222.1.1.10 netmask 255.255.255.0建立地址池
ip nat inside source list 101 pool servers overload 做映射
ip classless
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
no ip http server
!
access-list 101 permit ip host 192.168.2.200 any建立acl，妳需要映射出去的IP
以下是測試結果：R2為外網ping 192.168.2.200
R2#ping 192.168.2.200
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.200, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 24/36/80 ms
以下是在R1上debug ip nat
00:31:46: NAT: s=192.168.2.200->222.1.1.10, d=222.1.1.2 [1794]
00:31:46: NAT: s=192.168.2.200->222.1.1.10, d=222.1.1.2 [1795]
00:31:46: NAT: s=192.168.2.200->222.1.1.10, d=222.1.1.2 [1796]
00:31:46: NAT: s=192.168.2.200->222.1.1.10, d=222.1.1.2 [1797]
00:31:46: NAT: s=192.168.2.200->222.1.1.10, d=222.1.1.2 [1798]
所用的外網IP就是建立地址池的222.1.1.10