Instalamos el paquete necesario

sudo apt-get install dnsmasq

Vamos a personalizar el fichero:

sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig  
sudo nano /etc/dnsmasq.conf

Con esto repartirá direcciones IP por la interfaz y ip seleccionada.
Insertamos lo siguiente y modificamos lo que veamos oportuno:

interface=wlan0      # Use interface wlan0  
listen-address=150.5.100.1 # Explicitly specify the address to listen on  
bind-interfaces      # Bind to the interface to make sure we aren't sending things elsewhere  
server=8.8.8.8       # Forward DNS requests to Google DNS  
domain-needed        # Don't forward short names  
bogus-priv           # Never forward addresses in the non-routed address spaces.  
dhcp-range=150.5.100.50,150.5.100.150,12h # Assign IP addresses between 150.5.100.50 and 150.5.100.150 with a 12 hour lease time