Configure DD WRT

The following settings needs to be a dded under: Services->Additional DNSMasq Options

Code:
dhcp-boot=pxelinux.0,,192.168.230.1

Configure tftp

In this case we are using tftp-hpa

Code:
apt-get install tftpd-hpa mcedit /etc/default/tftpd-hpa TFTP_USERNAME="tftp" TFTP_DIRECTORY="/srv/tftp" TFTP_ADDRESS="0.0.0.0:69" TFTP_OPTIONS="--secure"

References

Source