Proxy Server Configuration - Mac

We need to turn off proxy configuration for the Macs in our environment. Any suggestions for deselecting each of the configurable proxy protocols in system preferences, using BigFix? Or any other suggestion you may have?

Thanks.

How would you do this on the command line?

Are these setting controlled by a plist? Which one?

The general way to go for all BigFix content is figure out how to do it on the command line, then do that in BigFix.