Syncflood attacks–is this normal?

I’ve recently been checking my Belkin router’s security log and I see numerous “Syncflood attacks”, as many as 80 incidents per day. Is this normal internet “noise,” or am I being singled out for an attack?

Most of the recorded IPs checkout (they’re coming from servers all over the world, but mostly China and Russia).

Here’s an example:

Found Syncflood attack from 61.147.107.56 in port 2967 => Wed Oct 21 02:59:29 2009
Found Syncflood attack from 61.147.107.56 in port 2967 => Wed Oct 21 02:59:59 2009
Found Syncflood attack from 125.120.153.240 in port 52878 => Wed Oct 21 03:38:12 2009
Found Syncflood attack from 125.120.153.240 in port 52878 => Wed Oct 21 03:38:42 2009

Thanks.