Same here. We received well over 150mbit/s, also on Monday the 19th, also from China. We also saw occassional spikes starting on January 9th. We saw the same BitTorrent /announce traffic, and lots of other random traffic.
We ended up mitigating it by moving our IP address on that host, and blocking all input on the old address.
We ended up mitigating it by moving our IP address on that host, and blocking all input on the old address.