dubious help request (Score 1)

Since Ubuntu Linux and most every other Desktop Linux available in 2014 has an "easy to use", intuitive GUI firewall configuration utility, I an skeptical that any person using Linux, even for the first time would (a) receive space on Slashdot to ask such question, and (b) a question that I consider completely unnecessary if writer is guided by common sense in using the standard and well documented visual Ubuntu Firewall application, and suspiciously naive in not going first to Ubuntu Help center or any person nearby who is not simple-minded in regard technology..