How to serve custom dns to dhcp clients in openWrt?

Question

I would like to serve custom DNS server to dhcp clients. How I can achieve that in openWrt?

Answer 1

DNS server adress corresponds to DHCP option 006. According to the OpenWRT Wiki your /etc/config/dhcp should look like

config 'dhcp' 'lan'
    ...
    list 'dhcp_option' '6,yourDNSIP'

Answer 2

If you have dnsmasq enabled you need to use DHCP-option 6

So in /etc/dnsmasq.conf you would add:

dhcp-option=6,8.8.8.8,8.8.4.4

To add the google DNS servers