Part of running an actual server (as opposed to shared web hosting) is actually being concerned about security. I regularly keep an eye on my access logs and the like, and I don’t usually find that much to worry about — I just keep iptables, and a few other tools, within reach.
But this particular user-agent string show up in visits from time to time (bots, I’m guessing)… what the hell is Firefox Miami Style?
18.104.22.168 - - [26/Dec/2013:13:34:39 -0500] "POST /wp-login.php/wp-login.php HTTP/1.1" 200 10956 "writegeek.com/wp-login.php/wp-login.php" "Mozilla/5.0 (Windows NT 6.1; rv:21.0) Gecko/20100101 Firefox/21.0 USA\\Miami Style"
Trying to POST to a nonexistent URL? That’s classic Miami style, if I’ve ever seen it.