Web filter with AirPort

[Jim Shimozawa]

Hello:
	Could anyone recommend web filter/parent control type program
that works well with Airport?
I have an Airport Base station serving an iBook, a G4 tower and my son 
and daughter's two PCs
running XP. (OK, so I tried. At least they don't smoke or drink.....)
I'd rather do my parent controlling at the router level and forget 
about dealing
with each machine individually.
Thank you all in advance.
Jim