Hi Rob,
I also get a some strange unrelated traffic: ping replies, SYN-ACK on
various ports, pings and SYN targeted to random IPs on my subnets.
So nothing new here.
I studied the source addresses for some time: china, russia, and alot of
"this IP range is really wold wide" according to RIPE.
Since they achieve nothing, I choose to ignore them, along with some tight
stateful firewall rules.
Marius, YO2LOJ