/ tool netwatch
add host=200.154.56.80 timeout=1s interval=20s up-script=on \
down-script=off comment="Link" disabled=no
/ system script
add name="Linkoff" source="/ip firewall nat set [/ip firewall nat find comment=Aviso_sem_link] disabled=no" \
policy=ftp,reboot,read,write,policy,test,winbox,password
add name="Linkon" source="/ ip firewall nat set [/ip firewall nat find comment=Aviso_sem_link] disabled=yes" \
policy=ftp,reboot,read,write,policy,test,winbox,password
/ system script
add name="off" source="/ip firewall nat find comment=Aviso_sem_link disabled=no" \
policy=ftp,reboot,read,write,policy,test,winbox,password
add name="on" source="[/ip firewall nat find comment=Aviso_sem_link disabled=yes" \
policy=ftp,reboot,read,write,policy,test,winbox,password
/ ip firewall nat
add chain=dstnat src-address=[Range de IP Cliente] protocol=tcp dst-port=80 action=dst-nat to-addresses=[IP do servidor web] to-ports=0-65535 comment="Aviso_sem_link" \
disabled=no