strange leak from front end

Hey guys, only had my truck a couple weeks, and found a leak on it. the liquid is an orangish brown color with no odor(not one I can smell) and its dripping from a corner, where the oil pan and block come together, below the oil filter. I have no idea what its leaking or why. Truck has 76,000 miles, its 2007 5.9, and it has a K and N air filter and a 4 inch turbo back exhaust. All help would be appreciated, and I am praying its nothing.
Rich