dynmap/web/config.js

var setup = {
        tileUrl:     'tiles/',
        updateUrl:   'up/',                             // For Apache and lighttpd
//      updateUrl:   'up/default.aspx?lasttimestamp=',  // For IIS
        updateRate:  2000,                              // Seconds the map should poll for updates. (Seconds) * 1000. The default is 2000 (every 2 seconds).
        showPortraitsOnMap: true,
        showPortraitsInPlayerList: true,
        showPlayerNameOnMap: false
};