网络描述：客户内部有一台OA服务器，及提供外部使用，又供内部使用。在AR 路由器上配置NAT Server 配置。
拓扑如下：
关键配置：
AR1 配置
acl number 2000
rule 5 permit
interface GigabitEthernet0/0/0 //内网口
ip address 192.168.200.2 255.255.255.252
#
interface GigabitEthernet0/0/1 //互联网口/WAN口
ip address 211.1.1.1 255.255.255.0
nat server protocol tcp global current-interface www inside 192.168.101.1 www
nat outbound 2000
#
ip route-static 0.0.0.0 0.0.0.0 211.1.1.254
ip route-static 192.168.0.0 255.255.0.0 192.168.200.1
交换机配置：
vlan batch 100 to 101 200
interface Vlanif100
ip address 192.168.100.254 255.255.255.0
#
interface Vlanif101
ip address 192.168.101.254 255.255.255.0
#
interface Vlanif200
ip address 192.168.200.1 255.255.255.252
#
interface MEth0/0/1
#
interface GigabitEthernet0/0/1
des hulianrouter
port link-type access
port default vlan 200
#
interface GigabitEthernet0/0/2
des bangong
port link-type access
port default vlan 100
#
interface GigabitEthernet0/0/3
desc server
port link-type access
port default vlan 101
ip route-static 0.0.0.0 0.0.0.0 192.168.200.2