Hi could someone give me a quick rundown on reading this log entry?

Thur, 03/04/2004 00:07:22 - TCP connection dropped - Source:203..x.x.x, 4498, WAN - Destination:203..x.x.x, 135, WAN - 'Suspicious TCP Data'

Does this mean that my firewall found something sstrange, it came from (allegedly) 203.x.x.x
and it's source was my network 203.x.x.x. (destination IP =me?)
It was over the internet = WAN
and it was using UDP?
Now if I get heaps of these from the same IP then someone is trying harder than usual to find an open door?