What do you do when somebody repeatedly tries to scan ports on your computer?

What do you do when somebody repeatedly tries to scan ports on your computer?

For a few days now, my firewall has been telling me that somebody from IP 123.134.95.199 has been trying to scan ports 3128, 7212, 8000, 8080, 8118, 8800 and 9090 on my single computer in L.A. Is there a way for me to do something that will make his machine go up in a puff of smoke? Seriously, though...