DOS attacks in my Netgear router log

[DJMK4]

Seems iv been getting a few DOS security attacks in my netgear routers log. Is this something to be worried about or is it simply telling me that the firewall has blocked these attacks?

UDP Packet - Source:***.***.***.***,54551 Destination:192.168.0.4,38113 - [DOS]
UDP Packet - Source:***.***.***.***,54551 Destination:192.168.0.4,38113 - [DOS]
UDP Packet - Source:***.***.***.***.3,54551 Destination:192.168.0.4,38113 - [DOS]
UDP Packet - Source:***.***.***.***,49765 Destination:192.168.0.4,38113 - [DOS]
UDP Packet - Source:***.***.***.***,6881 Destination:192.168.0.4,38113 - [DOS]

 

[DJMK4]

My UTorrent client is left running even if I have no torrents running, this is because I load it on windows startup. Dont suppose it really makes a difference but i might close it from now on if im not using it.