华为AR路由器NAT命令详解.doc

配置脚本

#

sysname RouterA

#

radius scheme system

#

domain system

#

acl number 2000 /配置允许进行NAT转换的内网地址段/

rule 0 permit source 192.168.0.0 0.0.0.255

rule 1 deny

#

interface Ethernet0/0

ip address 202.1.1.2 255.255.255.248

nat outbound 2000

interface Ethernet0/1

ip address 192.168.0.1 255.255.255.0 /内网网关/

#

interface NULL0

#

ip route-static 0.0.0.0 0.0.0.0 202.1.1.1 preference 60 /配置默认路由/

#

user-interface con 0

user-interface vty 0 4

#

return

配置脚本

#

sysname RouterA

#

nat address-group 0 202.1.1.3 202.1.1.6 /用户NAT的地址池/

#

radius scheme system

#

domain system

#

acl number 2000 /配置允许进行NAT转换的内网地址段/

rule 0 permit source 192.168.0.0 0.0.0.255

rule 1 deny

#

interface Ethernet0/0

ip address 202.1.1.2 255.255.255.248

nat outbound 2001 address-group 0 /在出接口上进行NAT转换/

#

interface Ethernet0/1

ip address 192.168.0.1 255.255.255.0 /内网网关/

#

interface NULL0

#

ip route-static 0.0.0.0 0.0.0.0 202.1.1.1 preference 60 /配置默认路由/

#

user-interface con 0

user-interface vty 0 4

return

5.2.4 对外提供ftp，www等服务
以www服务为例,除了5.2.1和5.2.2的配置,公网接口需要增加如下配置:

[Quidway-Ethernet0/0]nat server protocol tcp global 202.1.1.2 www inside 192.168.0.2 www

注意:如果需要其他用户可以ping通内部对外提供服务的服务器,必须增加如下配置:

[Router-Ethernet1]nat server protocol icmp global 202.1.1.2 inside 192.168.0.2

注意内部用户不能使用公网地址来访问内部服务器,必须使用内网地址访问.

如上例子:192.168.0.0/24网段的用户,不能访问http://202.1.1.2,而只能访问http://192.168.0.2

配置脚本

#

sysname RouterA

#

radius scheme system

#

domain system

#

acl number 2000 /配置允许进行NAT转换的内网地址段/

rule 0 permit source 192.168.0.0 0.0.0.255

rule 1 deny

#

interface Ethernet0/0

ip address 192.168.0.1 255.255.255.0 /内网网关/

nat outbound 2000

#

interface Serial0/0

ip address 202.1.1.2 255.255.255.252 /公网出口/

nat outbound 2000 /在出接口上进行NAT转换/

#

interface Serial0/1

ip address 61.1.1.2 255.255.255.252 /公网出口/

nat outbound 2000

#

interface NULL0

#

ip route-static 0.0.0.0 0.0.0.0 202.1.1.1 preference 60 /配置默认路由/

ip route-static 0.0.0.0 0.0.0.0 61.1.1.1 preference 60 /配置默认路由/

#

user-interface con 0

user-interface vty 0 4

#

return

【验证】

disp ip rout

Routing Table: public net

Destination/Mask Protocol Pre Cost Nexthop Interface

0.0.0.0/0 STATIC 60 0 61.1.1.1 Serial0/1

202.1.1.1 Serial0/0

61.1.1.0/30 DIRECT 0 0 61.1.1.6 Serial0/1

61.1.1.2/32 DIRECT 0 0 61.1.1.5 Serial0/1

61.1.1.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0

127.0.0.0/8 DIRECT 0 0 127.0.0.1 InLoopBack0

127.0.0.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0

192.168.0.0/24 DIRECT 0 0 192.168.0.1 Ethernet0/0

192.168.0.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0

202.1.1.0/30 DIRECT 0 0 202.1.1.6 Serial2/0/0

202.1.1.2/32 DIRECT 0 0 202.1.1.5 Serial2/0/0

202.1.1.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0

disp nat session

There are currently 2 NAT sessions:

Protocol GlobalAddr Port InsideAddr Port DestAddr Port

6 202.1.1.2 12288 192.168.0.2 1036 200.1.1.1 23

VPN: 0, status: 11, TTL: 24:00:00, Left: 23:59:55

6 61.1.1.2 12289 192.168.0.3 1035 200.1.1.1 23

VPN: 0, status: 11, TTL: 00:01:00, Left: 00:00:21

【提示】

1、 通过在路由上配置两条等值路由来实现负载分担

2、 如果只想实现NAT的主备用，只需要修改两条默认路由为不同的优先级即可