dnsmasq多物理网口dhcp配置

Posted 2020-10-02

家里有一台pc安装了openwrt做成软路由，升级主板后。不知道什么原因openwrt无法运行，只好自己配置了。

OS使用的是centos7.3mini版，DHCP使用的是dnsmasq2.77（最新版）

硬件：intel j1900主板 ，Intel e1000 pcie四口网卡

由于7.3自带的2.66在配置多网口dhcp时无法分配ip，不知道是什么问题造成的。2.77版本就没有这个问题。

dnsmasq系统启动文件：

[Unit]

Description=DNS caching server.

After=network.target

[Service]

ExecStart=/usr/sbin/dnsmasq -k

[Install]

WantedBy=multi-user.target

dnsmasq.conf文件内容：

# Configuration file for dnsmasq.

#

# Format is one option per line, legal options are the same

# as the long options legal on the command line. See

# "/usr/sbin/dnsmasq --help" or "man 8 dnsmasq" for details.

# Listen on this specific port instead of the standard DNS port

# (53). Setting this to zero completely disables DNS function,

# leaving only DHCP and/or TFTP.

#port=5353

# The following two options make you a better netizen, since they

# tell dnsmasq to filter out queries which the public DNS cannot

# answer, and which load the servers (especially the root servers)

# unnecessarily. If you have a dial-on-demand link they also stop

# these requests from bringing up the link unnecessarily.

# Never forward plain names (without a dot or domain part)

#domain-needed

# Never forward addresses in the non-routed address spaces.

#bogus-priv

# Uncomment these to enable DNSSEC validation and caching:

# (Requires dnsmasq to be built with DNSSEC option.)

#conf-file=%%PREFIX%%/share/dnsmasq/trust-anchors.conf

#dnssec

# Replies which are not DNSSEC signed may be legitimate, because the domain

# is unsigned, or may be forgeries. Setting this option tells dnsmasq to

# check that an unsigned reply is OK, by finding a secure proof that a DS

# record somewhere between the root and the domain does not exist.

# The cost of setting this is that even queries in unsigned domains will need

# one or more extra DNS queries to verify.

#dnssec-check-unsigned

# Uncomment this to filter useless windows-originated DNS requests

# which can trigger dial-on-demand links needlessly.

# Note that (amongst other things) this blocks all SRV requests,

# so don‘t use it if you use eg Kerberos, SIP, XMMP or Google-talk.

# This option only affects forwarding, SRV records originating for

# dnsmasq (via srv-host= lines) are not suppressed by it.

#filterwin2k

# Change this line if you want dns to get its upstream servers from

# somewhere other that /etc/resolv.conf

#resolv-file=

# By  default,  dnsmasq  will  send queries to any of the upstream

# servers it knows about and tries to favour servers to are  known

# to  be  up.  Uncommenting this forces dnsmasq to try each query

# with  each  server  strictly  in  the  order  they   appear   in

# /etc/resolv.conf

#strict-order

# If you don‘t want dnsmasq to read /etc/resolv.conf or any other

# file, getting its servers from this file instead (see below), then

# uncomment this.

#no-resolv

# If you don‘t want dnsmasq to poll /etc/resolv.conf or other resolv

# files for changes and re-read them then uncomment this.

#no-poll

# Add other name servers here, with domain specs if they are for

# non-public domains.

#server=/localnet/192.168.0.1

# Example of routing PTR queries to nameservers: this will send all

# address->name queries for 192.168.3/24 to nameserver 10.1.2.3

#server=/3.168.192.in-addr.arpa/10.1.2.3

# Add local-only domains here, queries in these domains are answered

# from /etc/hosts or DHCP only.

#local=/localnet/

# Add domains which you want to force to an IP address here.

# The example below send any host in double-click.net to a local

# web-server.

#address=/double-click.net/127.0.0.1

# --address (and --server) work with IPv6 addresses too.

#address=/www.thekelleys.org.uk/fe80::20d:60ff:fe36:f83

# Add the IPs of all queries to yahoo.com, google.com, and their

# subdomains to the vpn and search ipsets:

#ipset=/yahoo.com/google.com/vpn,search

# You can control how dnsmasq talks to a server: this forces

# queries to 10.1.2.3 to be routed via eth1

# [email protected]

# and this sets the source (ie local) address used to talk to

# 10.1.2.3 to 192.168.1.1 port 55 (there must be a interface with that

# IP on the machine, obviously).

# [email protected]#55

# If you want dnsmasq to change uid and gid to something other

# than the default, edit the following lines.

#user=

#group=

# If you want dnsmasq to listen for DHCP and DNS requests only on

# specified interfaces (and the loopback) give the name of the

# interface (eg eth0) here.

# Repeat the line for more than one interface.

interface=enp5s0f0

interface=enp5s0f1

interface=enp6s0f0

interface=enp6s0f1

# Or you can specify which interface _not_ to listen on

#except-interface=

# Or which to listen on by address (remember to include 127.0.0.1 if

# you use this.)

listen-address=192.168.5.1,192.168.6.1,127.0.0.1

# If you want dnsmasq to provide only DNS service on an interface,

# configure it as shown above, and then use the following line to

# disable DHCP and TFTP on it.

#no-dhcp-interface=

# On systems which support it, dnsmasq binds the wildcard address,

# even when it is listening on only some interfaces. It then discards

# requests that it shouldn‘t reply to. This has the advantage of

# working even when interfaces come and go and change address. If you

# want dnsmasq to really bind only the interfaces it is listening on,

# uncomment this option. About the only time you may need this is when

# running another nameserver on the same machine.

bind-interfaces

# If you don‘t want dnsmasq to read /etc/hosts, uncomment the

# following line.

#no-hosts

# or if you want it to read another file, as well as /etc/hosts, use

# this.

#addn-hosts=/etc/banner_add_hosts

# Set this (and domain: see below) if you want to have a domain

# automatically added to simple names in a hosts-file.

#expand-hosts

# Set the domain for dnsmasq. this is optional, but if it is set, it

# does the following things.

# 1) Allows DHCP hosts to have fully qualified domain names, as long

#     as the domain part matches this setting.

# 2) Sets the "domain" DHCP option thereby potentially setting the

#    domain of all systems configured by DHCP

# 3) Provides the domain part for "expand-hosts"

#domain=thekelleys.org.uk

# Set a different domain for a particular subnet

#domain=wireless.thekelleys.org.uk,192.168.2.0/24

# Same idea, but range rather then subnet

#domain=reserved.thekelleys.org.uk,192.68.3.100,192.168.3.200

# Uncomment this to enable the integrated DHCP server, you need

# to supply the range of addresses available for lease and optionally

# a lease time. If you have more than one network, you will need to

# repeat this for each network on which you want to supply DHCP

# service.

#dhcp-range=192.168.0.50,192.168.0.150,12h

dhcp-range=192.168.5.100,192.168.5.200,12h

dhcp-range=192.168.6.100,192.168.6.200,12h

dhcp-range=192.168.7.100,192.168.7.200,12h

dhcp-range=192.168.8.100,192.168.8.200,12h

# This is an example of a DHCP range where the netmask is given. This

# is needed for networks we reach the dnsmasq DHCP server via a relay

# agent. If you don‘t know what a DHCP relay agent is, you probably

# don‘t need to worry about this.

#dhcp-range=192.168.0.50,192.168.0.150,255.255.255.0,12h

# This is an example of a DHCP range which sets a tag, so that

# some DHCP options may be set only for this network.

#dhcp-range=set:red,192.168.0.50,192.168.0.150

# Use this DHCP range only when the tag "green" is set.

#dhcp-range=tag:green,192.168.0.50,192.168.0.150,12h

# Specify a subnet which can‘t be used for dynamic address allocation,

# is available for hosts with matching --dhcp-host lines. Note that

# dhcp-host declarations will be ignored unless there is a dhcp-range

# of some type for the subnet in question.

# In this case the netmask is implied (it comes from the network

# configuration on the machine running dnsmasq) it is possible to give

# an explicit netmask instead.

#dhcp-range=192.168.0.0,static

# Enable DHCPv6. Note that the prefix-length does not need to be specified

# and defaults to 64 if missing/

#dhcp-range=1234::2, 1234::500, 64, 12h

# Do Router Advertisements, BUT NOT DHCP for this subnet.

#dhcp-range=1234::, ra-only

# Do Router Advertisements, BUT NOT DHCP for this subnet, also try and

# add names to the DNS for the IPv6 address of SLAAC-configured dual-stack

# hosts. Use the DHCPv4 lease to derive the name, network segment and

# MAC address and assume that the host will also have an

# IPv6 address calculated using the SLAAC algorithm.

#dhcp-range=1234::, ra-names

# Do Router Advertisements, BUT NOT DHCP for this subnet.

# Set the lifetime to 46 hours. (Note: minimum lifetime is 2 hours.)

#dhcp-range=1234::, ra-only, 48h

# Do DHCP and Router Advertisements for this subnet. Set the A bit in the RA

# so that clients can use SLAAC addresses as well as DHCP ones.

#dhcp-range=1234::2, 1234::500, slaac

# Do Router Advertisements and stateless DHCP for this subnet. Clients will

# not get addresses from DHCP, but they will get other configuration information.

# They will use SLAAC for addresses.

#dhcp-range=1234::, ra-stateless

# Do stateless DHCP, SLAAC, and generate DNS names for SLAAC addresses

# from DHCPv4 leases.

#dhcp-range=1234::, ra-stateless, ra-names

# Do router advertisements for all subnets where we‘re doing DHCPv6

# Unless overridden by ra-stateless, ra-names, et al, the router

# advertisements will have the M and O bits set, so that the clients

# get addresses and configuration from DHCPv6, and the A bit reset, so the

# clients don‘t use SLAAC addresses.

#enable-ra

# Supply parameters for specified hosts using DHCP. There are lots

# of valid alternatives, so we will give examples of each. Note that

# IP addresses DO NOT have to be in the range given above, they just

# need to be on the same network. The order of the parameters in these

# do not matter, it‘s permissible to give name, address and MAC in any

# order.

# Always allocate the host with Ethernet address 11:22:33:44:55:66

# The IP address 192.168.0.60

#dhcp-host=11:22:33:44:55:66,192.168.0.60

# Always set the name of the host with hardware address

# 11:22:33:44:55:66 to be "fred"

#dhcp-host=11:22:33:44:55:66,fred

# Always give the host with Ethernet address 11:22:33:44:55:66

# the name fred and IP address 192.168.0.60 and lease time 45 minutes

#dhcp-host=11:22:33:44:55:66,fred,192.168.0.60,45m

# Give a host with Ethernet address 11:22:33:44:55:66 or

# 12:34:56:78:90:12 the IP address 192.168.0.60. Dnsmasq will assume

# that these two Ethernet interfaces will never be in use at the same

# time, and give the IP address to the second, even if it is already

# in use by the first. Useful for laptops with wired and wireless

# addresses.

#dhcp-host=11:22:33:44:55:66,12:34:56:78:90:12,192.168.0.60

# Give the machine which says its name is "bert" IP address

# 192.168.0.70 and an infinite lease

#dhcp-host=bert,192.168.0.70,infinite

# Always give the host with client identifier 01:02:02:04

# the IP address 192.168.0.60

#dhcp-host=id:01:02:02:04,192.168.0.60

# Always give the InfiniBand interface with hardware address

# 80:00:00:48:fe:80:00:00:00:00:00:00:f4:52:14:03:00:28:05:81 the

# ip address 192.168.0.61. The client id is derived from the prefix

# ff:00:00:00:00:00:02:00:00:02:c9:00 and the last 8 pairs of

# hex digits of the hardware address.

#dhcp-host=id:ff:00:00:00:00:00:02:00:00:02:c9:00:f4:52:14:03:00:28:05:81,192.168.0.61

# Always give the host with client identifier "marjorie"

# the IP address 192.168.0.60

#dhcp-host=id:marjorie,192.168.0.60

# Enable the address given for "judge" in /etc/hosts

# to be given to a machine presenting the name "judge" when

# it asks for a DHCP lease.

#dhcp-host=judge

# Never offer DHCP service to a machine whose Ethernet

# address is 11:22:33:44:55:66

#dhcp-host=11:22:33:44:55:66,ignore

# Ignore any client-id presented by the machine with Ethernet

# address 11:22:33:44:55:66. This is useful to prevent a machine

# being treated differently when running under different OS‘s or

# between PXE boot and OS boot.

#dhcp-host=11:22:33:44:55:66,id:*

# Send extra options which are tagged as "red" to

# the machine with Ethernet address 11:22:33:44:55:66

#dhcp-host=11:22:33:44:55:66,set:red

# Send extra options which are tagged as "red" to

# any machine with Ethernet address starting 11:22:33:

#dhcp-host=11:22:33:*:*:*,set:red

# Give a fixed IPv6 address and name to client with

# DUID 00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2

# Note the MAC addresses CANNOT be used to identify DHCPv6 clients.

# Note also the they [] around the IPv6 address are obligatory.

#dhcp-host=id:00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2, fred, [1234::5]

# Ignore any clients which are not specified in dhcp-host lines

# or /etc/ethers. Equivalent to ISC "deny unknown-clients".

# This relies on the special "known" tag which is set when

# a host is matched.

#dhcp-ignore=tag:!known

# Send extra options which are tagged as "red" to any machine whose

# DHCP vendorclass string includes the substring "Linux"

#dhcp-vendorclass=set:red,Linux

# Send extra options which are tagged as "red" to any machine one

# of whose DHCP userclass strings includes the substring "accounts"

#dhcp-userclass=set:red,accounts

# Send extra options which are tagged as "red" to any machine whose

# MAC address matches the pattern.

#dhcp-mac=set:red,00:60:8C:*:*:*

# If this line is uncommented, dnsmasq will read /etc/ethers and act

# on the ethernet-address/IP pairs found there just as if they had

# been given as --dhcp-host options. Useful if you keep

# MAC-address/host mappings there for other purposes.

#read-ethers

# Send options to hosts which ask for a DHCP lease.

# See RFC 2132 for details of available options.

# Common options can be given to dnsmasq by name:

# run "dnsmasq --help dhcp" to get a list.

# Note that all the common settings, such as netmask and

# broadcast address, DNS server and default route, are given

# sane defaults by dnsmasq. You very likely will not need

# any dhcp-options. If you use Windows clients and Samba, there

# are some options which are recommended, they are detailed at the

# end of this section.

# 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,1.2.3.4

# Override the default route supplied by dnsmasq and send no default

# route at all. Note that this only works for the options sent by

# default (1, 3, 6, 12, 28) the same line will send a zero-length option

# for all other option numbers.

#dhcp-option=3

# Set the NTP time server addresses to 192.168.0.4 and 10.10.0.5

#dhcp-option=option:ntp-server,192.168.0.4,10.10.0.5

# Send DHCPv6 option. Note [] around IPv6 addresses.

#dhcp-option=option6:dns-server,[1234::77],[1234::88]

# Send DHCPv6 option for namservers as the machine running

# dnsmasq and another.

#dhcp-option=option6:dns-server,[::],[1234::88]

# Ask client to poll for option changes every six hours. (RFC4242)

#dhcp-option=option6:information-refresh-time,6h

# Set option 58 client renewal time (T1). Defaults to half of the

# lease time if not specified. (RFC2132)

#dhcp-option=option:T1:1m

# Set option 59 rebinding time (T2). Defaults to 7/8 of the

# lease time if not specified. (RFC2132)

#dhcp-option=option:T2:2m

# Set the NTP time server address to be the same machine as

# is running dnsmasq

#dhcp-option=42,0.0.0.0

# Set the NIS domain name to "welly"

#dhcp-option=40,welly

# Set the default time-to-live to 50

#dhcp-option=23,50

# Set the "all subnets are local" flag

#dhcp-option=27,1

# Send the etherboot magic flag and then etherboot options (a string).

#dhcp-option=128,e4:45:74:68:00:00

#dhcp-option=129,NIC=eepro100

# Specify an option which will only be sent to the "red" network

# (see dhcp-range for the declaration of the "red" network)

# Note that the tag: part must precede the option: part.

#dhcp-option = tag:red, option:ntp-server, 192.168.1.1

# The following DHCP options set up dnsmasq in the same way as is specified

# for the ISC dhcpcd in

# http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt

# adapted for a typical dnsmasq installation where the host running

# dnsmasq is also the host running samba.

# you may want to uncomment some or all of them if you use

# Windows clients and Samba.

#dhcp-option=19,0           # option ip-forwarding off

#dhcp-option=44,0.0.0.0     # set netbios-over-TCP/IP nameserver(s) aka WINS server(s)

#dhcp-option=45,0.0.0.0     # netbios datagram distribution server

#dhcp-option=46,8           # netbios node type

# Send an empty WPAD option. This may be REQUIRED to get windows 7 to behave.

#dhcp-option=252,"\n"

# Send RFC-3397 DNS domain search DHCP option. WARNING: Your DHCP client

# probably doesn‘t support this......

#dhcp-option=option:domain-search,eng.apple.com,marketing.apple.com

# Send RFC-3442 classless static routes (note the netmask encoding)

#dhcp-option=121,192.168.1.0/24,1.2.3.4,10.0.0.0/8,5.6.7.8

# Send vendor-class specific options encapsulated in DHCP option 43.

# The meaning of the options is defined by the vendor-class so

# options are sent only when the client supplied vendor class

# matches the class given here. (A substring match is OK, so "MSFT"

# matches "MSFT" and "MSFT 5.0"). This example sets the

# mtftp address to 0.0.0.0 for PXEClients.

#dhcp-option=vendor:PXEClient,1,0.0.0.0

# Send microsoft-specific option to tell windows to release the DHCP lease

# when it shuts down. Note the "i" flag, to tell dnsmasq to send the

# value as a four-byte integer - that‘s what microsoft wants. See

# http://technet2.microsoft.com/WindowsServer/en/library/a70f1bb7-d2d4-49f0-96d6-4b7414ecfaae1033.mspx?mfr=true

#dhcp-option=vendor:MSFT,2,1i

# Send the Encapsulated-vendor-class ID needed by some configurations of

# Etherboot to allow is to recognise the DHCP server.

#dhcp-option=vendor:Etherboot,60,"Etherboot"

# Send options to PXELinux. Note that we need to send the options even

# though they don‘t appear in the parameter request list, so we need

# to use dhcp-option-force here.

# See http://syslinux.zytor.com/pxe.php#special for details.

# Magic number - needed before anything else is recognised

#dhcp-option-force=208,f1:00:74:7e

# Configuration file name

#dhcp-option-force=209,configs/common

# Path prefix

#dhcp-option-force=210,/tftpboot/pxelinux/files/

# Reboot time. (Note ‘i‘ to send 32-bit value)

#dhcp-option-force=211,30i

# Set the boot filename for netboot/PXE. You will only need

# this is you want to boot machines over the network and you will need

# a TFTP server; either dnsmasq‘s built in TFTP server or an

# external one. (See below for how to enable the TFTP server.)

#dhcp-boot=pxelinux.0

# The same as above, but use custom tftp-server instead machine running dnsmasq

#dhcp-boot=pxelinux,server.name,192.168.1.100

# Boot for Etherboot gPXE. The idea is to send two different

# filenames, the first loads gPXE, and the second tells gPXE what to

# load. The dhcp-match sets the gpxe tag for requests from gPXE.

#dhcp-match=set:gpxe,175 # gPXE sends a 175 option.

#dhcp-boot=tag:!gpxe,undionly.kpxe

#dhcp-boot=mybootimage

# Encapsulated options for Etherboot gPXE. All the options are

# encapsulated within option 175

#dhcp-option=encap:175, 1, 5b         # priority code

#dhcp-option=encap:175, 176, 1b       # no-proxydhcp

#dhcp-option=encap:175, 177, string   # bus-id

#dhcp-option=encap:175, 189, 1b       # BIOS drive code

#dhcp-option=encap:175, 190, user     # iSCSI username

#dhcp-option=encap:175, 191, pass     # iSCSI password

# Test for the architecture of a netboot client. PXE clients are

# supposed to send their architecture as option 93. (See RFC 4578)

#dhcp-match=peecees, option:client-arch, 0 #x86-32

#dhcp-match=itanics, option:client-arch, 2 #IA64

#dhcp-match=hammers, option:client-arch, 6 #x86-64

#dhcp-match=mactels, option:client-arch, 7 #EFI x86-64

# Do real PXE, rather than just booting a single file, this is an

# alternative to dhcp-boot.

#pxe-prompt="What system shall I netboot?"

# or with timeout before first available action is taken:

#pxe-prompt="Press F8 for menu.", 60

# Available boot services. for PXE.

#pxe-service=x86PC, "Boot from local disk"

# Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.

#pxe-service=x86PC, "Install Linux", pxelinux

# Loads <tftp-root>/pxelinux.0 from TFTP server at 1.2.3.4.

# Beware this fails on old PXE ROMS.

#pxe-service=x86PC, "Install Linux", pxelinux, 1.2.3.4

# Use bootserver on network, found my multicast or broadcast.

#pxe-service=x86PC, "Install windows from RIS server", 1

# Use bootserver at a known IP address.

#pxe-service=x86PC, "Install windows from RIS server", 1, 1.2.3.4

# If you have multicast-FTP available,

# information for that can be passed in a similar way using options 1

# to 5. See page 19 of

# http://download.intel.com/design/archives/wfm/downloads/pxespec.pdf

# Enable dnsmasq‘s built-in TFTP server

#enable-tftp

# Set the root directory for files available via FTP.

#tftp-root=/var/ftpd

# Do not abort if the tftp-root is unavailable

#tftp-no-fail

# Make the TFTP server more secure: with this set, only files owned by

# the user dnsmasq is running as will be send over the net.

#tftp-secure

# This option stops dnsmasq from negotiating a larger blocksize for TFTP

# transfers. It will slow things down, but may rescue some broken TFTP

# clients.

#tftp-no-blocksize

# Set the boot file name only when the "red" tag is set.

#dhcp-boot=tag:red,pxelinux.red-net

# An example of dhcp-boot with an external TFTP server: the name and IP

# address of the server are given after the filename.

# Can fail with old PXE ROMS. Overridden by --pxe-service.

#dhcp-boot=/var/ftpd/pxelinux.0,boothost,192.168.0.3

# If there are multiple external tftp servers having a same name

# (using /etc/hosts) then that name can be specified as the

# tftp_servername (the third option to dhcp-boot) and in that

# case dnsmasq resolves this name and returns the resultant IP

# addresses in round robin fashion. This facility can be used to

# load balance the tftp load among a set of servers.

#dhcp-boot=/var/ftpd/pxelinux.0,boothost,tftp_server_name

# Set the limit on DHCP leases, the default is 150

#dhcp-lease-max=150

# The DHCP server needs somewhere on disk to keep its lease database.

# This defaults to a sane location, but if you want to change it, use

# the line below.

#dhcp-leasefile=/var/lib/misc/dnsmasq.leases

# 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

# Run an executable when a DHCP lease is created or destroyed.

# The arguments sent to the script are "add" or "del",

# then the MAC address, the IP address and finally the hostname

# if there is one.

#dhcp-script=/bin/echo

# Set the cachesize here.

#cache-size=150

# If you want to disable negative caching, uncomment this.

#no-negcache

# Normally responses which come from /etc/hosts and the DHCP lease

# file have Time-To-Live set as zero, which conventionally means

# do not cache further. If you are happy to trade lower load on the

# server for potentially stale date, you can set a time-to-live (in

# seconds) here.

#local-ttl=

# If you want dnsmasq to detect attempts by Verisign to send queries

# to unregistered .com and .net hosts to its sitefinder service and

# have dnsmasq instead return the correct NXDOMAIN response, uncomment

# this line. You can add similar lines to do the same for other

# registries which have implemented wildcard A records.

#bogus-nxdomain=64.94.110.11

# If you want to fix up DNS results from upstream servers, use the

# alias option. This only works for IPv4.

# This alias makes a result of 1.2.3.4 appear as 5.6.7.8

#alias=1.2.3.4,5.6.7.8

# and this maps 1.2.3.x to 5.6.7.x

#alias=1.2.3.0,5.6.7.0,255.255.255.0

# and this maps 192.168.0.10->192.168.0.40 to 10.0.0.10->10.0.0.40

#alias=192.168.0.10-192.168.0.40,10.0.0.0,255.255.255.0

# Change these lines if you want dnsmasq to serve MX records.

# Return an MX record named "maildomain.com" with target

# servermachine.com and preference 50

#mx-host=maildomain.com,servermachine.com,50

# Set the default target for MX records created using the localmx option.

#mx-target=servermachine.com

# Return an MX record pointing to the mx-target for all local

# machines.

#localmx

# Return an MX record pointing to itself for all local machines.

#selfmx

# Change the following lines if you want dnsmasq to serve SRV

# records.  These are useful if you want to serve ldap requests for

# Active Directory and other windows-originated DNS requests.

# See RFC 2782.

# You may add multiple srv-host lines.

# The fields are <name>,<target>,<port>,<priority>,<weight>

# If the domain part if missing from the name (so that is just has the

# service and protocol sections) then the domain given by the domain=

# config option is used. (Note that expand-hosts does not need to be

# set for this to work.)

# A SRV record sending LDAP for the example.com domain to

# ldapserver.example.com port 389

#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389

# A SRV record sending LDAP for the example.com domain to

# ldapserver.example.com port 389 (using domain=)

#domain=example.com

#srv-host=_ldap._tcp,ldapserver.example.com,389

# Two SRV records for LDAP, each with different priorities

#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,1

#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,2

# A SRV record indicating that there is no LDAP server for the domain

# example.com

#srv-host=_ldap._tcp.example.com

# The following line shows how to make dnsmasq serve an arbitrary PTR

# record. This is useful for DNS-SD. (Note that the

# domain-name expansion done for SRV records _does_not

# occur for PTR records.)

#ptr-record=_http._tcp.dns-sd-services,"New Employee Page._http._tcp.dns-sd-services"

# Change the following lines to enable dnsmasq to serve TXT records.

# These are used for things like SPF and zeroconf. (Note that the

# domain-name expansion done for SRV records _does_not

# occur for TXT records.)

#Example SPF.

#txt-record=example.com,"v=spf1 a -all"

#Example zeroconf

#txt-record=_http._tcp.example.com,name=value,paper=A4

# Provide an alias for a "local" DNS name. Note that this _only_ works

# for targets which are names from DHCP or /etc/hosts. Give host

# "bert" another name, bertrand

#cname=bertand,bert

# For debugging purposes, log each DNS query as it passes through

# dnsmasq.

#log-queries

# Log lots of extra information about DHCP transactions.

#log-dhcp

# Include another lot of configuration options.

#conf-file=/etc/dnsmasq.more.conf

#conf-dir=/etc/dnsmasq.d

# Include all the files in a directory except those ending in .bak

#conf-dir=/etc/dnsmasq.d,.bak

# Include all files in a directory which end in .conf

#conf-dir=/etc/dnsmasq.d/,*.conf