dchpProxy

This is a very crude setup of dhcpProxy with dnsmasq.
With this setup it has to be on the same server as tftp (I think).
I will fix that and also change the config file from ltsp which is not relevent since I use it for a PXE install server.

I will also make a start script that handle dynamic subnet.


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Installing dnsmasq
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https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP

sudo apt-get install dnsmasq

sudo nano /etc/dnsmasq.d/ltsp.conf
add:

####################################################################
# Copied from https://help.ubuntu.com/community/UbuntuLTSP/ProxyDHCP
# Modified by vikjon0 2010-10-22 for PXE install server
#####################################################################
# Sample configuration for dnsmasq to function as a proxyDHCP server,
# enabling PXE clients to boot when an external, unmodifiable DHCP
# server is present.
# The main dnsmasq configuration is in /etc/dnsmasq.conf;
# the contents of this script are added to the main configuration.
# You may modify the file to suit your needs.

# Don't function as a DNS server:
port=0

# Log lots of extra information about DHCP transactions.
log-dhcp

# Dnsmasq can also function as a TFTP server. You may uninstall
# tftpd-hpa if you like, and uncomment the next line:
#enable-tftp

# Set the root directory for files available via FTP.
tftp-root=/var/lib/tftpboot

# The boot filename.
dhcp-boot=/var/lib/tftpboot/pxelinux.0

# rootpath option, for NFS
dhcp-option=17,/var/www/PXE

# kill multicast
dhcp-option=vendor:PXEClient,6,2b

# Disable re-use of the DHCP servername and filename fields as extra
# option space. That's to avoid confusing some old or broken DHCP clients.
dhcp-no-override

# PXE menu
pxe-prompt="Press F8 for boot menu", 3

# The known types are x86PC, PC98, IA64_EFI, Alpha, Arc_x86,
# Intel_Lean_Client, IA32_EFI, BC_EFI, Xscale_EFI and X86-64_EFI
pxe-service=X86PC, "Boot from network", pxelinux

# A boot service type of 0 is special, and will abort the
# net boot procedure and continue booting from local media.
pxe-service=X86PC, "Boot from local hard disk", 0

# If an integer boot service type, rather than a basename is given, then the
# PXE client will search for a suitable boot service for that type on the
# network. This search may be done by multicast or broadcast, or direct to a
# server if its IP address is provided.
#pxe-service=x86PC, "Install windows from RIS server", 1

# This range(s) is for the public interface, where dnsmasq functions
# as a proxy DHCP server providing boot information but no IP leases.
# Any ip in the subnet will do, so you may just put your server NIC ip here.
dhcp-range=192.168.0.130,proxy

# This range(s) is for the private network on 2-NIC servers,
# where dnsmasq functions as a normal DHCP server, providing IP leases.
#dhcp-range=192.168.0.20,192.168.0.250,8h

# For static client IPs, and only for the private subnets,
# you may put entries like this:
#dhcp-host=00:20:e0:3b:13:af,10.160.31.111,client111,infinite