P.S. Your guys are great. Sometimes even I didn't reply item by item, or thanks one by one, but I read every sentences in the emails. Many times read more than once. So please kindly realize that your suggestions are very valuable and highly appreciated (most time silently). BTW, I didn't realize there is a etckeeper before. just installed. And for iptables I have spent 5 hours on it based on the suggestions. Thanks again. Best regards,