华为ar 18-20路由器怎么设置?

[Quidway]dis cu
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sysname Quidway
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cpu-usage cycle 1min
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nat address-group 0 172.121.2.100 172.121.2.253 外网地址池
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radius scheme system
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domain system
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local-user admin
password cipher .]@USE=B,53Q=^Q`MAF4<1!!
service-type telnet terminal
level 3
service-type ftp
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acl number 2000 要做NAT的内网地址
rule 0 permit
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interface Aux0
async mode flow
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interface GigabitEthernet0/0/0
ip address *.*.*.* 255.255.255.0 外网地址
nat outbound 2000 address-group 0 NAT转换地址
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interface GigabitEthernet0/0/1
ip address *.*.*.* 255.255.255.0 内网地址
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interface NULL0
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FTP server enable
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ip route-static 0.0.0.0. 0.0.0.0. *.*.*.* preference 60 指上外网网关的路由

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user-interface con 0
user-interface aux 0
user-interface vty 0 4
authentication-mode scheme
#
return
[Quidway]