"It doesn't plug all the holes though. More paranoid firewall administrators will have a few firewall rules which explicitly allow certain connections and the last one will be rule that categorically drops anything."
By the way, newbie here. Aside from being a MikroTik novice, I'm also a critter lover. I'm usually found at home, treating my Pomeranian, Jules, to his nylabones and watching TV with my wife. Such a simple, yet, happy life. Cheers, fellas!