LTSP dnsmasq config

$ cat /etc/dnsmasq.d/ltsp.conf

# 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=/ltsp/i386/pxelinux.0

# rootpath option, for NFS
dhcp-option=17,/opt/ltsp/i386

# 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", /ltsp/i386/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=192.168.1.3,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=172.16.0.20,172.16.0.50,12h

# 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

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
$ cat /etc/dnsmasq.conf

interface=eth1

# Set this (and domain: see below) if you want to have a domain
# automatically added to simple names in a hosts-file.
expand-hosts

domain=foodmed.co.za

# Override the default route supplied by dnsmasq, which assumes the
# router is the same machine as the one running dnsmasq.
#dhcp-option=3,1.2.3.4

# Do the same thing, but using the option name
dhcp-option=option:router,172.16.0.1

# Set the DHCP server to authoritative mode. In this mode it will barge in
# and take over the lease for any client which broadcasts on the network,
# whether it has a record of the lease or not. This avoids long timeouts
# when a machine wakes up on a new network. DO NOT enable this if there's
# the slightest chance that you might end up accidentally configuring a DHCP
# server for your campus/company accidentally. The ISC server uses
# the same option, and this URL provides more information:
# http://www.isc.org/files/auth.html
dhcp-authoritative

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
$ netstat -tunap | grep dnsmasq

udp        0      0 0.0.0.0:4011            0.0.0.0:*                           26609/dnsmasq
udp        0      0 0.0.0.0:67              0.0.0.0:*                           26609/dnsmasq

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
$ grep "dnsmasq" /var/log/syslog

Apr 26 11:33:13 Ashton dnsmasq[26329]: started, version 2.59 DNS disabled
Apr 26 11:33:13 Ashton dnsmasq[26329]: compile time options: IPv6 GNU-getopt DBus i18n DHCP TFTP conntrack IDN
Apr 26 11:33:13 Ashton dnsmasq-dhcp[26329]: DHCP, IP range 172.16.0.20 -- 172.16.0.50, lease time 12h
Apr 26 11:33:13 Ashton dnsmasq-dhcp[26329]: DHCP, proxy on subnet 192.168.1.3
Apr 26 11:53:41 Ashton dnsmasq[26329]: exiting on receipt of SIGTERM
Apr 26 11:53:43 Ashton dnsmasq[26609]: started, version 2.59 DNS disabled
Apr 26 11:53:43 Ashton dnsmasq[26609]: compile time options: IPv6 GNU-getopt DBus i18n DHCP TFTP conntrack IDN
Apr 26 11:53:43 Ashton dnsmasq-dhcp[26609]: DHCP, IP range 172.16.0.20 -- 172.16.0.50, lease time 12h

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Then suddenly, while I was away, I see this happened as logged in syslog

Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 available DHCP range: 172.16.0.20 -- 172.16.0.50
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 DHCPREQUEST(eth1) 172.16.0.23 3c:4a:92:8b:c6:60
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 tags: eth1
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 DHCPACK(eth1) 172.16.0.23 3c:4a:92:8b:c6:60
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 requested options: 1:netmask, 3:router, 4, 23:default-ttl, 67:bootfile-name
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 bootfile name: /ltsp/i386/pxelinux.0
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 next server: 172.16.0.1
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  1 option: 53:message-type  05
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  4 option: 54:server-identifier  172.16.0.1
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  4 option: 51:lease-time  00:00:a8:c0
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  4 option: 58:T1  00:00:4d:ce
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  4 option: 59:T2  00:00:8d:16
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  4 option:  1:netmask  255.255.255.0
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  4 option: 28:broadcast  172.16.0.255
Apr 26 14:29:24 Ashton dnsmasq-dhcp[26609]: 1791609039 sent size:  4 option:  3:router  172.16.0.1
Apr 26 14:29:24 Ashton in.tftpd[26768]: RRQ from 172.16.0.23 filename /ltsp/i386/pxelinux.0