[dns-operations] iptables extension module for dns

[Manabu Sonoda]

Hi all

I've written a iptables extension module for DNS queries.
https://github.com/mimuret/iptables-ext-dns

I think many operators use u32 module,
but u32 module is difficult to match random subdomain query and qtype.
So, this module can be qname reverse matching and qtype matching.

Enjoy!

-- 
Manabu Sonoda <manabu-s at iij.ad.jp>
Internet Initiative Japan Inc.