i m using mikrotik 3.30 having problem in web browsing,mostly slow web browsing and some time no response take too much time to open a webpage.even some time u have to open a webpage again to open it.downloading speed is good.it was working fine when my DNS cache size was 2048kb but after changing it to 4096 kb.web browsing goes slow.cache time out is 3days.i change back my cache size to 2048 but still facing problem.