RouterOS 重新拨号后，从接口获得新ip并更新规则

备忘，
范例

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:global ipaddr [/ip address get [/ip address find interface=pppoe4plex] address] :set ipaddr [:pick $ipaddr 0 ([len $ipaddr] -3)] :global oldip [/ip firewall nat get [/ip firewall nat find comment="plexdstnat"] dst-address] :if ($ipaddr != $oldip) do={ :log info [/ip firewall nat set [/ip firewall nat find comment="plexdstnat"] dst-address=$ipaddr] :log info [/ip firewall nat set [/ip firewall nat find comment="plexsrcnat"] to-addresses=$ipaddr] }