NIS Firewall..disable or uninstall

Greetings,again.Can I,for the sake of testing,disable my NIS firewall?Or do I have to uninstall it to test a different firewall.And if I have to uninstall it,how does one do that when it’s part of a suite.If I have to uninstall ALL the suite,can I save my settings,and HOPE I can just install NAV???