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 port 22

定义外网地址端口

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 destination-port 22

定义内网地址

定义策略

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 好买网 GoodMai