On Sat, Feb 08, 2014 at 01:38:13PM +0530, Anurag Bhatia <me at anuragbhatia.com> wrote a message of 54 lines which said: > but here I am not sure how to create such string out and script them > for automation. Use this program: http://www.bortzmeyer.org/files/generate-netfilter-u32-dns-rule.py