1# Configuration file for dnsmasq. 2# 3# Format is one option per line, legal options are the same 4# as the long options legal on the command line. See 5# "/usr/sbin/dnsmasq --help" or "man 8 dnsmasq" for details. 6 7# The following two options make you a better netizen, since they 8# tell dnsmasq to filter out queries which the public DNS cannot 9# answer, and which load the servers (especially the root servers) 10# uneccessarily. If you have a dial-on-demand link they also stop 11# these requests from bringing up the link uneccessarily. 12 13# Never forward plain names (without a dot or domain part) 14#domain-needed 15# Never forward addresses in the non-routed address spaces. 16#bogus-priv 17 18 19# Uncomment this to filter useless windows-originated DNS requests 20# which can trigger dial-on-demand links needlessly. 21# Note that (amongst other things) this blocks all SRV requests, 22# so don't use it if you use eg Kerberos, SIP, XMMP or Google-talk. 23# This option only affects forwarding, SRV records originating for 24# dnsmasq (via srv-host= lines) are not suppressed by it. 25#filterwin2k 26 27# Change this line if you want dns to get its upstream servers from 28# somewhere other that /etc/resolv.conf 29#resolv-file= 30 31# By default, dnsmasq will send queries to any of the upstream 32# servers it knows about and tries to favour servers to are known 33# to be up. Uncommenting this forces dnsmasq to try each query 34# with each server strictly in the order they appear in 35# /etc/resolv.conf 36#strict-order 37 38# If you don't want dnsmasq to read /etc/resolv.conf or any other 39# file, getting its servers from this file instead (see below), then 40# uncomment this. 41#no-resolv 42 43# If you don't want dnsmasq to poll /etc/resolv.conf or other resolv 44# files for changes and re-read them then uncomment this. 45#no-poll 46 47# Add other name servers here, with domain specs if they are for 48# non-public domains. 49#server=/localnet/192.168.0.1 50 51# Example of routing PTR queries to nameservers: this will send all 52# address->name queries for 192.168.3/24 to nameserver 10.1.2.3 53#server=/3.168.192.in-addr.arpa/10.1.2.3 54 55# Add local-only domains here, queries in these domains are answered 56# from /etc/hosts or DHCP only. 57#local=/localnet/ 58 59# Add domains which you want to force to an IP address here. 60# The example below send any host in doubleclick.net to a local 61# webserver. 62#address=/doubleclick.net/127.0.0.1 63 64# --address (and --server) work with IPv6 addresses too. 65#address=/www.thekelleys.org.uk/fe80::20d:60ff:fe36:f83 66 67# You can control how dnsmasq talks to a server: this forces 68# queries to 10.1.2.3 to be routed via eth1 69# --server=10.1.2.3@eth1 70 71# and this sets the source (ie local) address used to talk to 72# 10.1.2.3 to 192.168.1.1 port 55 (there must be a interface with that 73# IP on the machine, obviously). 74# --server=10.1.2.3@192.168.1.1#55 75 76# If you want dnsmasq to change uid and gid to something other 77# than the default, edit the following lines. 78#user= 79#group= 80 81# If you want dnsmasq to listen for DHCP and DNS requests only on 82# specified interfaces (and the loopback) give the name of the 83# interface (eg eth0) here. 84# Repeat the line for more than one interface. 85#interface= 86# Or you can specify which interface _not_ to listen on 87#except-interface= 88# Or which to listen on by address (remember to include 127.0.0.1 if 89# you use this.) 90#listen-address= 91# If you want dnsmasq to provide only DNS service on an interface, 92# configure it as shown above, and then use the following line to 93# disable DHCP on it. 94#no-dhcp-interface= 95 96# On systems which support it, dnsmasq binds the wildcard address, 97# even when it is listening on only some interfaces. It then discards 98# requests that it shouldn't reply to. This has the advantage of 99# working even when interfaces come and go and change address. If you 100# want dnsmasq to really bind only the interfaces it is listening on, 101# uncomment this option. About the only time you may need this is when 102# running another nameserver on the same machine. 103#bind-interfaces 104 105# If you don't want dnsmasq to read /etc/hosts, uncomment the 106# following line. 107#no-hosts 108# or if you want it to read another file, as well as /etc/hosts, use 109# this. 110#addn-hosts=/etc/banner_add_hosts 111 112# Set this (and domain: see below) if you want to have a domain 113# automatically added to simple names in a hosts-file. 114#expand-hosts 115 116# Set the domain for dnsmasq. this is optional, but if it is set, it 117# does the following things. 118# 1) Allows DHCP hosts to have fully qualified domain names, as long 119# as the domain part matches this setting. 120# 2) Sets the "domain" DHCP option thereby potentially setting the 121# domain of all systems configured by DHCP 122# 3) Provides the domain part for "expand-hosts" 123#domain=thekelleys.org.uk 124 125# Set a different domain for a particular subnet 126#domain=wireless.thekelleys.org.uk,192.168.2.0/24 127 128# Same idea, but range rather then subnet 129#domain=reserved.thekelleys.org.uk,192.68.3.100,192.168.3.200 130 131# Uncomment this to enable the integrated DHCP server, you need 132# to supply the range of addresses available for lease and optionally 133# a lease time. If you have more than one network, you will need to 134# repeat this for each network on which you want to supply DHCP 135# service. 136#dhcp-range=192.168.0.50,192.168.0.150,12h 137 138# This is an example of a DHCP range where the netmask is given. This 139# is needed for networks we reach the dnsmasq DHCP server via a relay 140# agent. If you don't know what a DHCP relay agent is, you probably 141# don't need to worry about this. 142#dhcp-range=192.168.0.50,192.168.0.150,255.255.255.0,12h 143 144# This is an example of a DHCP range with a network-id, so that 145# some DHCP options may be set only for this network. 146#dhcp-range=red,192.168.0.50,192.168.0.150 147 148# Supply parameters for specified hosts using DHCP. There are lots 149# of valid alternatives, so we will give examples of each. Note that 150# IP addresses DO NOT have to be in the range given above, they just 151# need to be on the same network. The order of the parameters in these 152# do not matter, it's permissble to give name,adddress and MAC in any order 153 154# Always allocate the host with ethernet address 11:22:33:44:55:66 155# The IP address 192.168.0.60 156#dhcp-host=11:22:33:44:55:66,192.168.0.60 157 158# Always set the name of the host with hardware address 159# 11:22:33:44:55:66 to be "fred" 160#dhcp-host=11:22:33:44:55:66,fred 161 162# Always give the host with ethernet address 11:22:33:44:55:66 163# the name fred and IP address 192.168.0.60 and lease time 45 minutes 164#dhcp-host=11:22:33:44:55:66,fred,192.168.0.60,45m 165 166# Give a host with ethernet address 11:22:33:44:55:66 or 167# 12:34:56:78:90:12 the IP address 192.168.0.60. Dnsmasq will assume 168# that these two ethernet interfaces will never be in use at the same 169# time, and give the IP address to the second, even if it is already 170# in use by the first. Useful for laptops with wired and wireless 171# addresses. 172#dhcp-host=11:22:33:44:55:66,12:34:56:78:90:12,192.168.0.60 173 174# Give the machine which says its name is "bert" IP address 175# 192.168.0.70 and an infinite lease 176#dhcp-host=bert,192.168.0.70,infinite 177 178# Always give the host with client identifier 01:02:02:04 179# the IP address 192.168.0.60 180#dhcp-host=id:01:02:02:04,192.168.0.60 181 182# Always give the host with client identifier "marjorie" 183# the IP address 192.168.0.60 184#dhcp-host=id:marjorie,192.168.0.60 185 186# Enable the address given for "judge" in /etc/hosts 187# to be given to a machine presenting the name "judge" when 188# it asks for a DHCP lease. 189#dhcp-host=judge 190 191# Never offer DHCP service to a machine whose ethernet 192# address is 11:22:33:44:55:66 193#dhcp-host=11:22:33:44:55:66,ignore 194 195# Ignore any client-id presented by the machine with ethernet 196# address 11:22:33:44:55:66. This is useful to prevent a machine 197# being treated differently when running under different OS's or 198# between PXE boot and OS boot. 199#dhcp-host=11:22:33:44:55:66,id:* 200 201# Send extra options which are tagged as "red" to 202# the machine with ethernet address 11:22:33:44:55:66 203#dhcp-host=11:22:33:44:55:66,net:red 204 205# Send extra options which are tagged as "red" to 206# any machine with ethernet address starting 11:22:33: 207#dhcp-host=11:22:33:*:*:*,net:red 208 209# Ignore any clients which are specified in dhcp-host lines 210# or /etc/ethers. Equivalent to ISC "deny unkown-clients". 211# This relies on the special "known" tag which is set when 212# a host is matched. 213#dhcp-ignore=#known 214 215# Send extra options which are tagged as "red" to any machine whose 216# DHCP vendorclass string includes the substring "Linux" 217#dhcp-vendorclass=red,Linux 218 219# Send extra options which are tagged as "red" to any machine one 220# of whose DHCP userclass strings includes the substring "accounts" 221#dhcp-userclass=red,accounts 222 223# Send extra options which are tagged as "red" to any machine whose 224# MAC address matches the pattern. 225#dhcp-mac=red,00:60:8C:*:*:* 226 227# If this line is uncommented, dnsmasq will read /etc/ethers and act 228# on the ethernet-address/IP pairs found there just as if they had 229# been given as --dhcp-host options. Useful if you keep 230# MAC-address/host mappings there for other purposes. 231#read-ethers 232 233# Send options to hosts which ask for a DHCP lease. 234# See RFC 2132 for details of available options. 235# Common options can be given to dnsmasq by name: 236# run "dnsmasq --help dhcp" to get a list. 237# Note that all the common settings, such as netmask and 238# broadcast address, DNS server and default route, are given 239# sane defaults by dnsmasq. You very likely will not need 240# any dhcp-options. If you use Windows clients and Samba, there 241# are some options which are recommended, they are detailed at the 242# end of this section. 243 244# Override the default route supplied by dnsmasq, which assumes the 245# router is the same machine as the one running dnsmasq. 246#dhcp-option=3,1.2.3.4 247 248# Do the same thing, but using the option name 249#dhcp-option=option:router,1.2.3.4 250 251# Override the default route supplied by dnsmasq and send no default 252# route at all. Note that this only works for the options sent by 253# default (1, 3, 6, 12, 28) the same line will send a zero-length option 254# for all other option numbers. 255#dhcp-option=3 256 257# Set the NTP time server addresses to 192.168.0.4 and 10.10.0.5 258#dhcp-option=option:ntp-server,192.168.0.4,10.10.0.5 259 260# Set the NTP time server address to be the same machine as 261# is running dnsmasq 262#dhcp-option=42,0.0.0.0 263 264# Set the NIS domain name to "welly" 265#dhcp-option=40,welly 266 267# Set the default time-to-live to 50 268#dhcp-option=23,50 269 270# Set the "all subnets are local" flag 271#dhcp-option=27,1 272 273# Send the etherboot magic flag and then etherboot options (a string). 274#dhcp-option=128,e4:45:74:68:00:00 275#dhcp-option=129,NIC=eepro100 276 277# Specify an option which will only be sent to the "red" network 278# (see dhcp-range for the declaration of the "red" network) 279# Note that the net: part must precede the option: part. 280#dhcp-option = net:red, option:ntp-server, 192.168.1.1 281 282# The following DHCP options set up dnsmasq in the same way as is specified 283# for the ISC dhcpcd in 284# http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt 285# adapted for a typical dnsmasq installation where the host running 286# dnsmasq is also the host running samba. 287# you may want to uncomment some or all of them if you use 288# Windows clients and Samba. 289#dhcp-option=19,0 # option ip-forwarding off 290#dhcp-option=44,0.0.0.0 # set netbios-over-TCP/IP nameserver(s) aka WINS server(s) 291#dhcp-option=45,0.0.0.0 # netbios datagram distribution server 292#dhcp-option=46,8 # netbios node type 293 294# Send RFC-3397 DNS domain search DHCP option. WARNING: Your DHCP client 295# probably doesn't support this...... 296#dhcp-option=option:domain-search,eng.apple.com,marketing.apple.com 297 298# Send RFC-3442 classless static routes (note the netmask encoding) 299#dhcp-option=121,192.168.1.0/24,1.2.3.4,10.0.0.0/8,5.6.7.8 300 301# Send vendor-class specific options encapsulated in DHCP option 43. 302# The meaning of the options is defined by the vendor-class so 303# options are sent only when the client supplied vendor class 304# matches the class given here. (A substring match is OK, so "MSFT" 305# matches "MSFT" and "MSFT 5.0"). This example sets the 306# mtftp address to 0.0.0.0 for PXEClients. 307#dhcp-option=vendor:PXEClient,1,0.0.0.0 308 309# Send microsoft-specific option to tell windows to release the DHCP lease 310# when it shuts down. Note the "i" flag, to tell dnsmasq to send the 311# value as a four-byte integer - that's what microsoft wants. See 312# http://technet2.microsoft.com/WindowsServer/en/library/a70f1bb7-d2d4-49f0-96d6-4b7414ecfaae1033.mspx?mfr=true 313#dhcp-option=vendor:MSFT,2,1i 314 315# Send the Encapsulated-vendor-class ID needed by some configurations of 316# Etherboot to allow is to recognise the DHCP server. 317#dhcp-option=vendor:Etherboot,60,"Etherboot" 318 319# Send options to PXELinux. Note that we need to send the options even 320# though they don't appear in the parameter request list, so we need 321# to use dhcp-option-force here. 322# See http://syslinux.zytor.com/pxe.php#special for details. 323# Magic number - needed before anything else is recognised 324#dhcp-option-force=208,f1:00:74:7e 325# Configuration file name 326#dhcp-option-force=209,configs/common 327# Path prefix 328#dhcp-option-force=210,/tftpboot/pxelinux/files/ 329# Reboot time. (Note 'i' to send 32-bit value) 330#dhcp-option-force=211,30i 331 332# Set the boot filename for netboot/PXE. You will only need 333# this is you want to boot machines over the network and you will need 334# a TFTP server; either dnsmasq's built in TFTP server or an 335# external one. (See below for how to enable the TFTP server.) 336#dhcp-boot=pxelinux.0 337 338# Boot for Etherboot gPXE. The idea is to send two different 339# filenames, the first loads gPXE, and the second tells gPXE what to 340# load. The dhcp-match sets the gpxe tag for requests from gPXE. 341#dhcp-match=gpxe,175 # gPXE sends a 175 option. 342#dhcp-boot=net:#gpxe,undionly.kpxe 343#dhcp-boot=mybootimage 344 345# Encapsulated options for Etherboot gPXE. All the options are 346# encapsulated within option 175 347#dhcp-option=encap:175, 1, 5b # priority code 348#dhcp-option=encap:175, 176, 1b # no-proxydhcp 349#dhcp-option=encap:175, 177, string # bus-id 350#dhcp-option=encap:175, 189, 1b # BIOS drive code 351#dhcp-option=encap:175, 190, user # iSCSI username 352#dhcp-option=encap:175, 191, pass # iSCSI password 353 354# Test for the architecture of a netboot client. PXE clients are 355# supposed to send their architecture as option 93. (See RFC 4578) 356#dhcp-match=peecees, option:client-arch, 0 #x86-32 357#dhcp-match=itanics, option:client-arch, 2 #IA64 358#dhcp-match=hammers, option:client-arch, 6 #x86-64 359#dhcp-match=mactels, option:client-arch, 7 #EFI x86-64 360 361# Do real PXE, rather than just booting a single file, this is an 362# alternative to dhcp-boot. 363#pxe-prompt="What system shall I netboot?" 364# or with timeout before first available action is taken: 365#pxe-prompt="Press F8 for menu.", 60 366 367# Available boot services. for PXE. 368#pxe-service=x86PC, "Boot from local disk", 0 369 370# Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server. 371#pxe-service=x86PC, "Install Linux", pxelinux 372 373# Loads <tftp-root>/pxelinux.0 from TFTP server at 1.2.3.4. 374# Beware this fails on old PXE ROMS. 375#pxe-service=x86PC, "Install Linux", pxelinux, 1.2.3.4 376 377# Use bootserver on network, found my multicast or broadcast. 378#pxe-service=x86PC, "Install windows from RIS server", 1 379 380# Use bootserver at a known IP address. 381#pxe-service=x86PC, "Install windows from RIS server", 1, 1.2.3.4 382 383# If you have multicast-FTP available, 384# information for that can be passed in a similar way using options 1 385# to 5. See page 19 of 386# http://download.intel.com/design/archives/wfm/downloads/pxespec.pdf 387 388 389# Enable dnsmasq's built-in TFTP server 390#enable-tftp 391 392# Set the root directory for files availble via FTP. 393#tftp-root=/var/ftpd 394 395# Make the TFTP server more secure: with this set, only files owned by 396# the user dnsmasq is running as will be send over the net. 397#tftp-secure 398 399# This option stops dnsmasq from negotiating a larger blocksize for TFTP 400# transfers. It will slow things down, but may rescue some broken TFTP 401# clients. 402#tftp-no-blocksize 403 404# Set the boot file name only when the "red" tag is set. 405#dhcp-boot=net:red,pxelinux.red-net 406 407# An example of dhcp-boot with an external TFTP server: the name and IP 408# address of the server are given after the filename. 409# Can fail with old PXE ROMS. Overridden by --pxe-service. 410#dhcp-boot=/var/ftpd/pxelinux.0,boothost,192.168.0.3 411 412# Set the limit on DHCP leases, the default is 150 413#dhcp-lease-max=150 414 415# The DHCP server needs somewhere on disk to keep its lease database. 416# This defaults to a sane location, but if you want to change it, use 417# the line below. 418#dhcp-leasefile=/var/lib/misc/dnsmasq.leases 419 420# Set the DHCP server to authoritative mode. In this mode it will barge in 421# and take over the lease for any client which broadcasts on the network, 422# whether it has a record of the lease or not. This avoids long timeouts 423# when a machine wakes up on a new network. DO NOT enable this if there's 424# the slighest chance that you might end up accidentally configuring a DHCP 425# server for your campus/company accidentally. The ISC server uses 426# the same option, and this URL provides more information: 427# http://www.isc.org/index.pl?/sw/dhcp/authoritative.php 428#dhcp-authoritative 429 430# Run an executable when a DHCP lease is created or destroyed. 431# The arguments sent to the script are "add" or "del", 432# then the MAC address, the IP address and finally the hostname 433# if there is one. 434#dhcp-script=/bin/echo 435 436# Set the cachesize here. 437#cache-size=150 438 439# If you want to disable negative caching, uncomment this. 440#no-negcache 441 442# Normally responses which come form /etc/hosts and the DHCP lease 443# file have Time-To-Live set as zero, which conventionally means 444# do not cache further. If you are happy to trade lower load on the 445# server for potentially stale date, you can set a time-to-live (in 446# seconds) here. 447#local-ttl= 448 449# If you want dnsmasq to detect attempts by Verisign to send queries 450# to unregistered .com and .net hosts to its sitefinder service and 451# have dnsmasq instead return the correct NXDOMAIN response, uncomment 452# this line. You can add similar lines to do the same for other 453# registries which have implemented wildcard A records. 454#bogus-nxdomain=64.94.110.11 455 456# If you want to fix up DNS results from upstream servers, use the 457# alias option. This only works for IPv4. 458# This alias makes a result of 1.2.3.4 appear as 5.6.7.8 459#alias=1.2.3.4,5.6.7.8 460# and this maps 1.2.3.x to 5.6.7.x 461#alias=1.2.3.0,5.6.7.0,255.255.255.0 462# and this maps 192.168.0.10->192.168.0.40 to 10.0.0.10->10.0.0.40 463#alias=192.168.0.10-192.168.0.40,10.0.0.0,255.255.255.0 464 465# Change these lines if you want dnsmasq to serve MX records. 466 467# Return an MX record named "maildomain.com" with target 468# servermachine.com and preference 50 469#mx-host=maildomain.com,servermachine.com,50 470 471# Set the default target for MX records created using the localmx option. 472#mx-target=servermachine.com 473 474# Return an MX record pointing to the mx-target for all local 475# machines. 476#localmx 477 478# Return an MX record pointing to itself for all local machines. 479#selfmx 480 481# Change the following lines if you want dnsmasq to serve SRV 482# records. These are useful if you want to serve ldap requests for 483# Active Directory and other windows-originated DNS requests. 484# See RFC 2782. 485# You may add multiple srv-host lines. 486# The fields are <name>,<target>,<port>,<priority>,<weight> 487# If the domain part if missing from the name (so that is just has the 488# service and protocol sections) then the domain given by the domain= 489# config option is used. (Note that expand-hosts does not need to be 490# set for this to work.) 491 492# A SRV record sending LDAP for the example.com domain to 493# ldapserver.example.com port 289 494#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389 495 496# A SRV record sending LDAP for the example.com domain to 497# ldapserver.example.com port 289 (using domain=) 498#domain=example.com 499#srv-host=_ldap._tcp,ldapserver.example.com,389 500 501# Two SRV records for LDAP, each with different priorities 502#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,1 503#srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,2 504 505# A SRV record indicating that there is no LDAP server for the domain 506# example.com 507#srv-host=_ldap._tcp.example.com 508 509# The following line shows how to make dnsmasq serve an arbitrary PTR 510# record. This is useful for DNS-SD. (Note that the 511# domain-name expansion done for SRV records _does_not 512# occur for PTR records.) 513#ptr-record=_http._tcp.dns-sd-services,"New Employee Page._http._tcp.dns-sd-services" 514 515# Change the following lines to enable dnsmasq to serve TXT records. 516# These are used for things like SPF and zeroconf. (Note that the 517# domain-name expansion done for SRV records _does_not 518# occur for TXT records.) 519 520#Example SPF. 521#txt-record=example.com,"v=spf1 a -all" 522 523#Example zeroconf 524#txt-record=_http._tcp.example.com,name=value,paper=A4 525 526# Provide an alias for a "local" DNS name. Note that this _only_ works 527# for targets which are names from DHCP or /etc/hosts. Give host 528# "bert" another name, bertrand 529#cname=bertand,bert 530 531# For debugging purposes, log each DNS query as it passes through 532# dnsmasq. 533#log-queries 534 535# Log lots of extra information about DHCP transactions. 536#log-dhcp 537 538# Include a another lot of configuration options. 539#conf-file=/etc/dnsmasq.more.conf 540#conf-dir=/etc/dnsmasq.d 541