I upgraded ZA to V9.2.057.000 to speed up load time for IE8. Upon rebooting after the install ZA indicated:
"New Network Found. IP addr: 172.16.0.0. A new connection between [my] computer and the internet or another computer. " There was no option given to block this IP so I assigned it to the internet zone.

I never set up a home network. I am concerned that this may be a hacker. Hope that's not the case, but why is ZA 'discovering' this now when ZA has been running without interuption for years?

Any explanation & help resolving this is appreciated! Should I be concerned?