my upload bandwidth is 512k, from yesterday its been eaten.
i made a Torch for all the network and found that users are using more bandwidth than that of the given to them . and there is an ip at the source :255.255.255.255 and destination ip 0.0.0.0 is taking the top bandwidth amoung all.
better you torch in detail. click on the port and protocol to find out what is the problem. I agree with janisk, to firewall the sourde ip, but it looks better if we know the port first, maybe its kind of trojan…