Setting up linuxserver/netbootxyz docker image and dnsmasq DHCP in proxy mode when your main router has locked DHCP settings

Prerequisites

1. Docker is installed
2. dnsmasq is installed

Steps

1. Start Docker image from linuxserver.io

Head down to linuxserver/netbootxyz and follow the instructions to get a netboot.xyz container up and running.

2. Configuration

/etc/dnsmasq.conf

Full

port=0
interface=eth0
bind-dynamic
log-dhcp
dhcp-authoritative
dhcp-range=192.168.1.0,proxy,255.255.255.0
pxe-service=x86PC, "NETBOOT (BIOS)", "netboot.xyz.kpxe", 192.168.1.253
pxe-service=X86-64_EFI, "NETBOOT (EFI)", "netboot.xyz.efi", 192.168.1.253

Explanations

• port=0 - (optional) disable DNS server if not in use
• interface=eth0 - (optional) only listen on interface eth0, repeat this line for more interfaces, remove for all interfaces
• log-dhcp - (optional) log DHCP requests
• bind-dynamic - (optional) binds to new interfaces added after start
• dhcp-authoritative - prioritize this DHCP server in a network
• dhcp-range - replace 192.168.1.0 and 255.255.255.0 according to your IP range and subnet, set to proxy mode to proxy your original DHCP server
• pxe-service=x86PC for BIOS systems, replace 192.168.1.253 with the IP of the machine hosting netbootxyz
• pxe-service=X86-64_EFI for UEFI systems, replace 192.168.1.253 with the IP of the machine hosting netbootxyz
• enable-tftp is not included as it already hosted by the Docker container

3. Start your services