attempted intrusion?

can anyone tell me what this entry means? It is in:

 

Internet Worm Protection

  worm detection

 

Intrusion Portscan

 

Details:

Attempted Intrusion "Portscan" against your machine was detected and blocked.
Intruder: 192.xxx.x.x (domain(53)).   [I blocked out the numbers to be safe]
Risk Level: Medium.
Protocol: UDP.
Attacked IP: My-PC.
Attacked Port: 52032.

 

I know the 192.xxx.x.x is my dsl box ( i checked the numbers on google)

So does that mean something malicious  tried to come to my computer and it registered as my DSL box becasue the intruder had to pass through there?

Or is it a false positive type of thing?