In my setup, all outdoors for the simple reason(s) that, I only have to run one coax in to the house (for now) and also if one fails from getting wet/corroded, it's cheaper to replace it than run 5 separate runs of cable (more later). With a bit of weatherproofing or just some shelter to keep the rain from falling directly on it, it'll probably last for years. So far it's been outside more than 2 years with no ill effects.