According to Vastu Shastra, a house or business place with a door (entrance) facing south (center) or south-west is a Vastu dosha (Defect). Entrance facing North, east, or west is more preferred than south-facing. But when the property is already bought or exists then it can be cured with Dakshin Mukhay yantra. This yantra is to be fixed above the south door facing outside. This will help to protect your premises from the negative Dosha