I have recently bought a VPS and getting lfd error I have contact my host but didn't received any reply. Now I have to solve this problem myself. So I am looking for suggestion.
find /|grep LFD.LOG remember unix is case sensitive, so if the log file is in lowercase, adjust the command above accordingly until you find it.
After looking at the error message it looks like you run Cpanel, so you should be able to view the lfd logs from your WHM >> Configserver Security & Firewall option