Portscan alert

In my internet Worm Protection log, I notice that 1-2 times nearly everyday I get the following alert

 

 

Portscan agains (my machine) detected and blocked

 

Intruder 192.168.0.1 (Domain (53) )

Risk- medium

Attacked IP My PC

attack port  49911 (this number varies though)

 

I knbow that 192.168.0.1 is my DSL router. I know that at times they say that this is maybe overload, but I wonder if since incoming goes through my DSL box, is this a legit attack and it shows 192.168.0.1 because it's filtered through my DSL box ?

 

Its blocked so that is cool.  I use NAV2008 and do not want to change at this time. Just curious if I'm getting attacked nearly everyday or is this a "false positive"