ros 动态IP映射 解决回流问题！

/ip firewall nat add chain=dstnat dst-address=58.58.58.58 protocol=tcp dst-port=80 action=dst-nat to-addresses=192.168.2.115 to-ports=80 comment="80"

:global newipaddress
:global lodipaddress
:set newipaddress [/ip address get [/ip address find dynamic=yes interface="pppoe-FTTH"] address]
:set newipaddress [:pick $newipaddress 0 ([:len $newipaddress] -3)]
:set lodipaddress [/ip firewall nat get [/ip firewall nat find comment="80"] dst-address]
:if ($newipaddress != $lodipaddress) do={/ip firewall nat set [/ip firewall nat find comment="80"] dst-address=$newipaddress}

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