- /ip firewall nat
2) add action=redirect chain=dstnat dst-port=80 in-interface=****** protocol=tcp \ to-ports=80803) /ip proxy
4) set enabled=yes
5) /ip proxy access6) add dst-host=www.yahoo.com action=allow
7) add dst-host=yahoo.com action=allow
8) add dst-address=0.0.0.0/0 action deny