DNS server requests on all interfaces

[hakabe]

The script is set to listen DNS requests on all interfaces. My ISP contacted me and told me, that my IP is distorting other traffic in my network (DNS).

The idea is only to serve DHCP and DNS on wlan side, right?

[garywill]

I created a PR for this yet not accepted.
#312

I forked this script
https://github.com/garywill/linux-router
if you are interested.