My central router freezes every 20-30 minutes(but may vary) for 2 minutes. There are 3 interfaces there, just one freezes(that one with more clients, mainly in bridge), but router doesnt shutdown. Also I changed router, I put there completely new settings different from first one, but it didnt helped. So it is not router or software or configuration problem. Can anybody help how to solve this or where can be problem, how to find out about parazite client or hacker?