4.1;;NAT-地址转换. 1

4.1.1;;用出接口地址做Easy nat 1

4.1.2;;地址池方式做nat 2

4.1.3;ISDN拨号做nat上网. 3

4.1.4;;一个以太口也做nat转换. 4

4.1.5;;对外提供FTP，www等服务. 5

4.1NAT-地址转换4.1.1用出接口地址做Easy nat

【Router】

当前路由器提示视图

依次输入的配置命令，重要的命令红色突出显示

简单说明

!

适用版本vrp1.74及1.44

[Router]

acl 1 match-order auto

[Router-acl1]

rule normal permit source 10.0.0.0 0.0.0.255

[Router-acl1]

rule normal deny source any

!

[Router]

interface Ethernet0

[Router-Ethernet0]

ip address 10.0.0.1 255.255.255.0

!

[Router]

interface Ethernet1

[Router-Ethernet1]

ip address 202.1.1.1 255.255.255.0

[Router-Ethernet1]

nat outbound 1 interface

!

[Router]

ip route-static 0.0.0.0 0.0.0.0 202.1.1.2 preference 60

[Router]

!

[Router]

return

4.1.2地址池方式做nat

【Router】

当前路由器提示视图

依次输入的配置命令，重要的命令红色突出显示

简单说明

！

适用版本vrp1.74及1.44

[Router]

nat address-group 1 202.1.1.1 202.1.1.6 pool1

!

[Router]

acl 101 acl 1 match-order auto

[Router-acl1]

rule normal permit source 10.0.0.0 0.0.0.255

[Router-acl1]

rule normal deny source any

!

[Router]

interface Ethernet0

[Router-Ethernet0]

ip address 10.0.0.1 255.255.255.0

!

[Router]

interface Ethernet1

[Router-Ethernet1]

ip address 202.1.1.1 255.255.255.0

[Router-Ethernet1]

nat outbound 1 pool pool1

!

[Router]

ip route-static 0.0.0.0 0.0.0.0 202.1.1.2 preference 60

!

return

4.1.3ISDN拨号做nat上网

【Router】

当前路由器提示视图

依次输入的配置命令，重要的命令红色突出显示

简单说明

!

适用版本vrp1.74及1.44

[Router]

dialer-rule 1 ip permit

[Router]

!

acl 1 match-order auto

[Router-acl1]

rule normal permit source 10.0.0.0 0.0.0.255

[Router-acl1]

rule normal deny source any

!

内网的以太口地址根据实际情况来配置

[Router]

interface Ethernet0

[Router-Ethernet0]

ip address 10.0.0.1 255.255.255.0

[Router-Ethernet0]

!

[Router-Serial0]

interface Bri0

[Router-Bri0]

link-protocol ppp

[Router-Bri0]

ppp mp

使能128K两B拨号

[Router-Bri0]

ppp pap local-user 16900 passWord simple 16900

[Router-Bri0]

ip address ppp-negotiate

[Router-Bri0]

dialer enable-circular

ISDN拔号不用配置dialer enable-legacy,假如是灵活DDR拔号，还应配置undo dialer enable-legacy

[Router-Bri0]

dialer-group 1

[Router-Bri0]

dialer number 16900

[Router-Bri0]

nat outbound 1 interface

!

[Router]

ip route-static 0.0.0.0 0.0.0.0 bri 0 preference 60

使用isdn-bri拨号

[Router]

!

[Router]

return

4.1.4一个以太口也做nat转换

【Router】

当前路由器提示视图

依次输入的配置命令，重要的命令红色突出显示

简单说明

!

适用版本vrp1.74及1.44

[Router]

acl 101 match-order auto

[Router-acl101]

rule normal deny ip source 10.0.0.0 0.0.0.255 destination 10.0.0.1 0.0.0.0

[Router-acl101]

rule normal permit source 10.0.0.0 0.0.0.255

[Router-acl101]

rule normal deny source any

!

[Router]

interface Ethernet0

[Router-Ethernet0]

ip address 10.0.0.1 255.255.255.0

!

[Router]

interface Ethernet0

[Router-Ethernet0]

ip address 202.1.1.1 255.255.255.0

[Router-Ethernet0]

ip address 10.0.0.1 255.255.255.0 sub

[Router-Ethernet0]

nat outbound 101 interface

!

[Router]

ip route-static 0.0.0.0 0.0.0.0 202.1.1.2 preference 60

[Router]

!

[Router]

return

说明：上例不推荐使用。

4.1.5对外提供ftp，www等服务

以www服务为例,除了3.1.1和3.1.2的配置,公网接口需要增加如下配置:

[Router-Ethernet1]nat server global 202.1.1.2 www inside 10.0.0.2 www tcp

注重:假如需要其他用户可以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 global 202.1.1.2 any inside 10.0.0.2 any icmp

注重: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:10.0.0.0/24网段的用户,不能访问http://202.1.1.2,而只能访问http://10.0.0.2

;;附件
网络协议-nat-地址转换.doc