/ip firewall nat
add action=dst-nat chain=dstnat comment="REDIRECT TO PROXY SQUID" disabled=no dst-port=80 protocol=tcp src-address=!172.16.1.10 to-addresses=172.16.1.10 to-ports=3128

nb: 172.16.1.10 ip proxy

maap klo kayak gini kayaknya juga bisa bos...saya dah nyoba bisa
maap klo salah