/ip firewall nat
add chain=dstnat protocol=tcp dst-port=80 action=redirect to-ports=8080 src-address-list=Morosos

/ip firewall filter
add chain=forward src-address-list=Morosos protocol=udp dst-port=53 action=accept
add chain=forward dst-address-list=Morosos protocol=udp src-port=53 action=accept
add chain=forward src-address-list=Morosos action=drop

/ip proxy set enabled=yes
/ip proxy access
add action=allow disabled=no dst-address=(IP_de_tu_Hots_o_Website)
add action=deny disabled=no redirect-to="http://configurarmikrotikwireless.com/morosos/"


WebSite GRATIS Wordpress:
https://es.wordpress.com/
WebSite Profesional:
http://rodhosting.com/

Fuente: Wiki Mikrotik