If it is not a PS hose, Lucas can slow the leak down for a little while.
To determine if the P/S rack is leaking, remove the clamp that holds the boot to the P/S rack. If you see any fluid in there, you know it is the P/S rack. After you have finished looking, put a zip tie around the boot to keep it in place.
If the rack is no good, I also recommend replacing the outer tierod ends while you are down there doing repairs.