1.PXE Plugin
2.TFTP Plugin
3.Local DNS/DHCP Plugin
latest version 3.1.5 download here
https://bintray.com/package/files/openmediavault-plugin-developers/erasmus-testing/openmediavault-dnsmasq?order=asc&sort=name&basePath=pool%2Fmain%2Fo%2Fopenmediavault-dnsmasq&tab=files
3.1 wget it
3.2 dpkg -i openmediavault-dnsmasq_3.1.5_all.deb
3.3 apt-get install -f -y