Sometimes DIR-855 get stucked and needs to reboot. Nothing happens when it get stucked. It happens about in few days cycle. I have firewall activated and QoS yms. Wlan is off. Funny, 200 euro's router and needs to be rebooted by disconnect power supply and reconnect. Does that get to warm or just over-used? Any similar problems? Sometimes also when I got wlan on, it restarts Wlan's very often (few hours maybe?).