需求说明：外网IP：123.123.123.123:22222 映射 内网 10.100.200.22:22

定义内网地址池(ssh-22)和端口号

set security nat destination pool ssh-22 address 10.100.200.22/32

set security nat destination pool ssh-22 address port 22

定义外网地址端口

edit security nat destination #进入nat destination 编辑界面

set rule-set u-t0-t from zone untrust #设置 u-to-t 流量从那个区域进入

set rule-set u-t0-t rule ssh22 match source-address 0.0.0.0/0 #原地址

set rule-set u-to-t rule ssh22 match destination-address 123.123.123.123/32 #目标地址

set rule-set u-to-t rule ssh22 match destination-port 22222 #对外开放端口

set rule-set u-to-t rule ssh22 match protocol tcp #使用协义

set rule-set u-to-t rule ssh22 then destination-nat pool ssh-22 #转换到那个地址池

exit（退出 nat destination 编辑界面)

定义内网协议端口

set applications application tcp-22 protocol tcp

set applications application tcp-22 destination-port 22

定义内网地址

set security zones security-zone trust address-book address ssh22 10.100.200.22

定义策略

edit security policies from-zone untrust to-zone trust

set policy linux-ssh22 match source-address any

set policy linux-ssh22 match destination-address ssh22 #address-book 地址

set policy linux-ssh22 match application tcp-22 #设置为内网真实端口

set policy linux-ssh22 match application junios-ssh

set policy linux-ssh22 then permit

更多建站及源码交易信息请见 GoodMai