[OpenWrt Wiki] Dnsmasq
https://openwrt.org/ru/doc/howto/dhcp.dnsmasq03.03.2018 · Dnsmasq supports static and dynamic DHCP leases and BOOTP for network booting of disk-less machines. It is already installed and preconfigured on OpenWrt. See → /etc/config/dhcp . Configuration The configuration is done with help of the uci-configuration file: /etc/config/dhcp, but you can use this together with the file /etc/dnsmasq.conf .