quick and dirty dns + dhcp  
```sh
sudo dnsmasq --no-daemon --port 53 \
  --dhcp-range=192.168.255.100,192.168.255.200 --dhcp-leasefile=/dev/null \
  --bind-interfaces --interface eth0 --listen-address=192.168.200.1
```

quick and dirty tftp  
```sh
sudo dnsmasq --no-daemon --port=0 --enable-tftp --tftp-root=/path/to/wherever \
  --bind-interfaces --interface eth0 --listen-address=192.168.200.1