Annotation of embedaddon/dnsmasq/dnsmasq.conf.example, revision 1.1

1.1     ! misho       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: # Listen on this specific port instead of the standard DNS port
        !             8: # (53). Setting this to zero completely disables DNS function,
        !             9: # leaving only DHCP and/or TFTP.
        !            10: #port=5353
        !            11: 
        !            12: # The following two options make you a better netizen, since they
        !            13: # tell dnsmasq to filter out queries which the public DNS cannot
        !            14: # answer, and which load the servers (especially the root servers)
        !            15: # unnecessarily. If you have a dial-on-demand link they also stop
        !            16: # these requests from bringing up the link unnecessarily.
        !            17: 
        !            18: # Never forward plain names (without a dot or domain part)
        !            19: #domain-needed
        !            20: # Never forward addresses in the non-routed address spaces.
        !            21: #bogus-priv
        !            22: 
        !            23: 
        !            24: # Uncomment this to filter useless windows-originated DNS requests
        !            25: # which can trigger dial-on-demand links needlessly.
        !            26: # Note that (amongst other things) this blocks all SRV requests,
        !            27: # so don't use it if you use eg Kerberos, SIP, XMMP or Google-talk.
        !            28: # This option only affects forwarding, SRV records originating for
        !            29: # dnsmasq (via srv-host= lines) are not suppressed by it.
        !            30: #filterwin2k
        !            31: 
        !            32: # Change this line if you want dns to get its upstream servers from
        !            33: # somewhere other that /etc/resolv.conf
        !            34: #resolv-file=
        !            35: 
        !            36: # By  default,  dnsmasq  will  send queries to any of the upstream
        !            37: # servers it knows about and tries to favour servers to are  known
        !            38: # to  be  up.  Uncommenting this forces dnsmasq to try each query
        !            39: # with  each  server  strictly  in  the  order  they   appear   in
        !            40: # /etc/resolv.conf
        !            41: #strict-order
        !            42: 
        !            43: # If you don't want dnsmasq to read /etc/resolv.conf or any other
        !            44: # file, getting its servers from this file instead (see below), then
        !            45: # uncomment this.
        !            46: #no-resolv
        !            47: 
        !            48: # If you don't want dnsmasq to poll /etc/resolv.conf or other resolv
        !            49: # files for changes and re-read them then uncomment this.
        !            50: #no-poll
        !            51: 
        !            52: # Add other name servers here, with domain specs if they are for
        !            53: # non-public domains.
        !            54: #server=/localnet/192.168.0.1
        !            55: 
        !            56: # Example of routing PTR queries to nameservers: this will send all
        !            57: # address->name queries for 192.168.3/24 to nameserver 10.1.2.3
        !            58: #server=/3.168.192.in-addr.arpa/10.1.2.3
        !            59: 
        !            60: # Add local-only domains here, queries in these domains are answered
        !            61: # from /etc/hosts or DHCP only.
        !            62: #local=/localnet/
        !            63: 
        !            64: # Add domains which you want to force to an IP address here.
        !            65: # The example below send any host in double-click.net to a local
        !            66: # web-server.
        !            67: #address=/double-click.net/127.0.0.1
        !            68: 
        !            69: # --address (and --server) work with IPv6 addresses too.
        !            70: #address=/www.thekelleys.org.uk/fe80::20d:60ff:fe36:f83
        !            71: 
        !            72: # Add the IPs of all queries to yahoo.com, google.com, and their
        !            73: # subdomains to the vpn and search ipsets:
        !            74: #ipset=/yahoo.com/google.com/vpn,search
        !            75: 
        !            76: # You can control how dnsmasq talks to a server: this forces
        !            77: # queries to 10.1.2.3 to be routed via eth1
        !            78: # server=10.1.2.3@eth1
        !            79: 
        !            80: # and this sets the source (ie local) address used to talk to
        !            81: # 10.1.2.3 to 192.168.1.1 port 55 (there must be a interface with that
        !            82: # IP on the machine, obviously).
        !            83: # server=10.1.2.3@192.168.1.1#55
        !            84: 
        !            85: # If you want dnsmasq to change uid and gid to something other
        !            86: # than the default, edit the following lines.
        !            87: #user=
        !            88: #group=
        !            89: 
        !            90: # If you want dnsmasq to listen for DHCP and DNS requests only on
        !            91: # specified interfaces (and the loopback) give the name of the
        !            92: # interface (eg eth0) here.
        !            93: # Repeat the line for more than one interface.
        !            94: #interface=
        !            95: # Or you can specify which interface _not_ to listen on
        !            96: #except-interface=
        !            97: # Or which to listen on by address (remember to include 127.0.0.1 if
        !            98: # you use this.)
        !            99: #listen-address=
        !           100: # If you want dnsmasq to provide only DNS service on an interface,
        !           101: # configure it as shown above, and then use the following line to
        !           102: # disable DHCP and TFTP on it.
        !           103: #no-dhcp-interface=
        !           104: 
        !           105: # On systems which support it, dnsmasq binds the wildcard address,
        !           106: # even when it is listening on only some interfaces. It then discards
        !           107: # requests that it shouldn't reply to. This has the advantage of
        !           108: # working even when interfaces come and go and change address. If you
        !           109: # want dnsmasq to really bind only the interfaces it is listening on,
        !           110: # uncomment this option. About the only time you may need this is when
        !           111: # running another nameserver on the same machine.
        !           112: #bind-interfaces
        !           113: 
        !           114: # If you don't want dnsmasq to read /etc/hosts, uncomment the
        !           115: # following line.
        !           116: #no-hosts
        !           117: # or if you want it to read another file, as well as /etc/hosts, use
        !           118: # this.
        !           119: #addn-hosts=/etc/banner_add_hosts
        !           120: 
        !           121: # Set this (and domain: see below) if you want to have a domain
        !           122: # automatically added to simple names in a hosts-file.
        !           123: #expand-hosts
        !           124: 
        !           125: # Set the domain for dnsmasq. this is optional, but if it is set, it
        !           126: # does the following things.
        !           127: # 1) Allows DHCP hosts to have fully qualified domain names, as long
        !           128: #     as the domain part matches this setting.
        !           129: # 2) Sets the "domain" DHCP option thereby potentially setting the
        !           130: #    domain of all systems configured by DHCP
        !           131: # 3) Provides the domain part for "expand-hosts"
        !           132: #domain=thekelleys.org.uk
        !           133: 
        !           134: # Set a different domain for a particular subnet
        !           135: #domain=wireless.thekelleys.org.uk,192.168.2.0/24
        !           136: 
        !           137: # Same idea, but range rather then subnet
        !           138: #domain=reserved.thekelleys.org.uk,192.68.3.100,192.168.3.200
        !           139: 
        !           140: # Uncomment this to enable the integrated DHCP server, you need
        !           141: # to supply the range of addresses available for lease and optionally
        !           142: # a lease time. If you have more than one network, you will need to
        !           143: # repeat this for each network on which you want to supply DHCP
        !           144: # service.
        !           145: #dhcp-range=192.168.0.50,192.168.0.150,12h
        !           146: 
        !           147: # This is an example of a DHCP range where the netmask is given. This
        !           148: # is needed for networks we reach the dnsmasq DHCP server via a relay
        !           149: # agent. If you don't know what a DHCP relay agent is, you probably
        !           150: # don't need to worry about this.
        !           151: #dhcp-range=192.168.0.50,192.168.0.150,255.255.255.0,12h
        !           152: 
        !           153: # This is an example of a DHCP range which sets a tag, so that
        !           154: # some DHCP options may be set only for this network.
        !           155: #dhcp-range=set:red,192.168.0.50,192.168.0.150
        !           156: 
        !           157: # Use this DHCP range only when the tag "green" is set.
        !           158: #dhcp-range=tag:green,192.168.0.50,192.168.0.150,12h
        !           159: 
        !           160: # Specify a subnet which can't be used for dynamic address allocation,
        !           161: # is available for hosts with matching --dhcp-host lines. Note that
        !           162: # dhcp-host declarations will be ignored unless there is a dhcp-range
        !           163: # of some type for the subnet in question.
        !           164: # In this case the netmask is implied (it comes from the network
        !           165: # configuration on the machine running dnsmasq) it is possible to give
        !           166: # an explicit netmask instead.
        !           167: #dhcp-range=192.168.0.0,static
        !           168: 
        !           169: # Enable DHCPv6. Note that the prefix-length does not need to be specified
        !           170: # and defaults to 64 if missing/
        !           171: #dhcp-range=1234::2, 1234::500, 64, 12h
        !           172: 
        !           173: # Do Router Advertisements, BUT NOT DHCP for this subnet.
        !           174: #dhcp-range=1234::, ra-only 
        !           175: 
        !           176: # Do Router Advertisements, BUT NOT DHCP for this subnet, also try and
        !           177: # add names to the DNS for the IPv6 address of SLAAC-configured dual-stack 
        !           178: # hosts. Use the DHCPv4 lease to derive the name, network segment and 
        !           179: # MAC address and assume that the host will also have an
        !           180: # IPv6 address calculated using the SLAAC alogrithm.
        !           181: #dhcp-range=1234::, ra-names
        !           182: 
        !           183: # Do Router Advertisements, BUT NOT DHCP for this subnet.
        !           184: # Set the lifetime to 46 hours. (Note: minimum lifetime is 2 hours.)
        !           185: #dhcp-range=1234::, ra-only, 48h
        !           186: 
        !           187: # Do DHCP and Router Advertisements for this subnet. Set the A bit in the RA
        !           188: # so that clients can use SLAAC addresses as well as DHCP ones.
        !           189: #dhcp-range=1234::2, 1234::500, slaac
        !           190: 
        !           191: # Do Router Advertisements and stateless DHCP for this subnet. Clients will
        !           192: # not get addresses from DHCP, but they will get other configuration information.
        !           193: # They will use SLAAC for addresses.
        !           194: #dhcp-range=1234::, ra-stateless
        !           195: 
        !           196: # Do stateless DHCP, SLAAC, and generate DNS names for SLAAC addresses
        !           197: # from DHCPv4 leases.
        !           198: #dhcp-range=1234::, ra-stateless, ra-names
        !           199: 
        !           200: # Do router advertisements for all subnets where we're doing DHCPv6
        !           201: # Unless overriden by ra-stateless, ra-names, et al, the router 
        !           202: # advertisements will have the M and O bits set, so that the clients
        !           203: # get addresses and configuration from DHCPv6, and the A bit reset, so the 
        !           204: # clients don't use SLAAC addresses.
        !           205: #enable-ra
        !           206: 
        !           207: # Supply parameters for specified hosts using DHCP. There are lots
        !           208: # of valid alternatives, so we will give examples of each. Note that
        !           209: # IP addresses DO NOT have to be in the range given above, they just
        !           210: # need to be on the same network. The order of the parameters in these
        !           211: # do not matter, it's permissible to give name, address and MAC in any
        !           212: # order.
        !           213: 
        !           214: # Always allocate the host with Ethernet address 11:22:33:44:55:66
        !           215: # The IP address 192.168.0.60
        !           216: #dhcp-host=11:22:33:44:55:66,192.168.0.60
        !           217: 
        !           218: # Always set the name of the host with hardware address
        !           219: # 11:22:33:44:55:66 to be "fred"
        !           220: #dhcp-host=11:22:33:44:55:66,fred
        !           221: 
        !           222: # Always give the host with Ethernet address 11:22:33:44:55:66
        !           223: # the name fred and IP address 192.168.0.60 and lease time 45 minutes
        !           224: #dhcp-host=11:22:33:44:55:66,fred,192.168.0.60,45m
        !           225: 
        !           226: # Give a host with Ethernet address 11:22:33:44:55:66 or
        !           227: # 12:34:56:78:90:12 the IP address 192.168.0.60. Dnsmasq will assume
        !           228: # that these two Ethernet interfaces will never be in use at the same
        !           229: # time, and give the IP address to the second, even if it is already
        !           230: # in use by the first. Useful for laptops with wired and wireless
        !           231: # addresses.
        !           232: #dhcp-host=11:22:33:44:55:66,12:34:56:78:90:12,192.168.0.60
        !           233: 
        !           234: # Give the machine which says its name is "bert" IP address
        !           235: # 192.168.0.70 and an infinite lease
        !           236: #dhcp-host=bert,192.168.0.70,infinite
        !           237: 
        !           238: # Always give the host with client identifier 01:02:02:04
        !           239: # the IP address 192.168.0.60
        !           240: #dhcp-host=id:01:02:02:04,192.168.0.60
        !           241: 
        !           242: # Always give the host with client identifier "marjorie"
        !           243: # the IP address 192.168.0.60
        !           244: #dhcp-host=id:marjorie,192.168.0.60
        !           245: 
        !           246: # Enable the address given for "judge" in /etc/hosts
        !           247: # to be given to a machine presenting the name "judge" when
        !           248: # it asks for a DHCP lease.
        !           249: #dhcp-host=judge
        !           250: 
        !           251: # Never offer DHCP service to a machine whose Ethernet
        !           252: # address is 11:22:33:44:55:66
        !           253: #dhcp-host=11:22:33:44:55:66,ignore
        !           254: 
        !           255: # Ignore any client-id presented by the machine with Ethernet
        !           256: # address 11:22:33:44:55:66. This is useful to prevent a machine
        !           257: # being treated differently when running under different OS's or
        !           258: # between PXE boot and OS boot.
        !           259: #dhcp-host=11:22:33:44:55:66,id:*
        !           260: 
        !           261: # Send extra options which are tagged as "red" to
        !           262: # the machine with Ethernet address 11:22:33:44:55:66
        !           263: #dhcp-host=11:22:33:44:55:66,set:red
        !           264: 
        !           265: # Send extra options which are tagged as "red" to
        !           266: # any machine with Ethernet address starting 11:22:33:
        !           267: #dhcp-host=11:22:33:*:*:*,set:red
        !           268: 
        !           269: # Give a fixed IPv6 address and name to client with 
        !           270: # DUID 00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2
        !           271: # Note the MAC addresses CANNOT be used to identify DHCPv6 clients.
        !           272: # Note also the they [] around the IPv6 address are obilgatory.
        !           273: #dhcp-host=id:00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2, fred, [1234::5] 
        !           274: 
        !           275: # Ignore any clients which are not specified in dhcp-host lines
        !           276: # or /etc/ethers. Equivalent to ISC "deny unknown-clients".
        !           277: # This relies on the special "known" tag which is set when
        !           278: # a host is matched.
        !           279: #dhcp-ignore=tag:!known
        !           280: 
        !           281: # Send extra options which are tagged as "red" to any machine whose
        !           282: # DHCP vendorclass string includes the substring "Linux"
        !           283: #dhcp-vendorclass=set:red,Linux
        !           284: 
        !           285: # Send extra options which are tagged as "red" to any machine one
        !           286: # of whose DHCP userclass strings includes the substring "accounts"
        !           287: #dhcp-userclass=set:red,accounts
        !           288: 
        !           289: # Send extra options which are tagged as "red" to any machine whose
        !           290: # MAC address matches the pattern.
        !           291: #dhcp-mac=set:red,00:60:8C:*:*:*
        !           292: 
        !           293: # If this line is uncommented, dnsmasq will read /etc/ethers and act
        !           294: # on the ethernet-address/IP pairs found there just as if they had
        !           295: # been given as --dhcp-host options. Useful if you keep
        !           296: # MAC-address/host mappings there for other purposes.
        !           297: #read-ethers
        !           298: 
        !           299: # Send options to hosts which ask for a DHCP lease.
        !           300: # See RFC 2132 for details of available options.
        !           301: # Common options can be given to dnsmasq by name:
        !           302: # run "dnsmasq --help dhcp" to get a list.
        !           303: # Note that all the common settings, such as netmask and
        !           304: # broadcast address, DNS server and default route, are given
        !           305: # sane defaults by dnsmasq. You very likely will not need
        !           306: # any dhcp-options. If you use Windows clients and Samba, there
        !           307: # are some options which are recommended, they are detailed at the
        !           308: # end of this section.
        !           309: 
        !           310: # Override the default route supplied by dnsmasq, which assumes the
        !           311: # router is the same machine as the one running dnsmasq.
        !           312: #dhcp-option=3,1.2.3.4
        !           313: 
        !           314: # Do the same thing, but using the option name
        !           315: #dhcp-option=option:router,1.2.3.4
        !           316: 
        !           317: # Override the default route supplied by dnsmasq and send no default
        !           318: # route at all. Note that this only works for the options sent by
        !           319: # default (1, 3, 6, 12, 28) the same line will send a zero-length option
        !           320: # for all other option numbers.
        !           321: #dhcp-option=3
        !           322: 
        !           323: # Set the NTP time server addresses to 192.168.0.4 and 10.10.0.5
        !           324: #dhcp-option=option:ntp-server,192.168.0.4,10.10.0.5
        !           325: 
        !           326: # Send DHCPv6 option. Note [] around IPv6 addresses.
        !           327: #dhcp-option=option6:dns-server,[1234::77],[1234::88]
        !           328: 
        !           329: # Send DHCPv6 option for namservers as the machine running 
        !           330: # dnsmasq and another.
        !           331: #dhcp-option=option6:dns-server,[::],[1234::88]
        !           332: 
        !           333: # Ask client to poll for option changes every six hours. (RFC4242)
        !           334: #dhcp-option=option6:information-refresh-time,6h
        !           335: 
        !           336: # Set the NTP time server address to be the same machine as
        !           337: # is running dnsmasq
        !           338: #dhcp-option=42,0.0.0.0
        !           339: 
        !           340: # Set the NIS domain name to "welly"
        !           341: #dhcp-option=40,welly
        !           342: 
        !           343: # Set the default time-to-live to 50
        !           344: #dhcp-option=23,50
        !           345: 
        !           346: # Set the "all subnets are local" flag
        !           347: #dhcp-option=27,1
        !           348: 
        !           349: # Send the etherboot magic flag and then etherboot options (a string).
        !           350: #dhcp-option=128,e4:45:74:68:00:00
        !           351: #dhcp-option=129,NIC=eepro100
        !           352: 
        !           353: # Specify an option which will only be sent to the "red" network
        !           354: # (see dhcp-range for the declaration of the "red" network)
        !           355: # Note that the tag: part must precede the option: part.
        !           356: #dhcp-option = tag:red, option:ntp-server, 192.168.1.1
        !           357: 
        !           358: # The following DHCP options set up dnsmasq in the same way as is specified
        !           359: # for the ISC dhcpcd in
        !           360: # http://www.samba.org/samba/ftp/docs/textdocs/DHCP-Server-Configuration.txt
        !           361: # adapted for a typical dnsmasq installation where the host running
        !           362: # dnsmasq is also the host running samba.
        !           363: # you may want to uncomment some or all of them if you use
        !           364: # Windows clients and Samba.
        !           365: #dhcp-option=19,0           # option ip-forwarding off
        !           366: #dhcp-option=44,0.0.0.0     # set netbios-over-TCP/IP nameserver(s) aka WINS server(s)
        !           367: #dhcp-option=45,0.0.0.0     # netbios datagram distribution server
        !           368: #dhcp-option=46,8           # netbios node type
        !           369: 
        !           370: # Send an empty WPAD option. This may be REQUIRED to get windows 7 to behave.
        !           371: #dhcp-option=252,"\n"
        !           372: 
        !           373: # Send RFC-3397 DNS domain search DHCP option. WARNING: Your DHCP client
        !           374: # probably doesn't support this......
        !           375: #dhcp-option=option:domain-search,eng.apple.com,marketing.apple.com
        !           376: 
        !           377: # Send RFC-3442 classless static routes (note the netmask encoding)
        !           378: #dhcp-option=121,192.168.1.0/24,1.2.3.4,10.0.0.0/8,5.6.7.8
        !           379: 
        !           380: # Send vendor-class specific options encapsulated in DHCP option 43.
        !           381: # The meaning of the options is defined by the vendor-class so
        !           382: # options are sent only when the client supplied vendor class
        !           383: # matches the class given here. (A substring match is OK, so "MSFT"
        !           384: # matches "MSFT" and "MSFT 5.0"). This example sets the
        !           385: # mtftp address to 0.0.0.0 for PXEClients.
        !           386: #dhcp-option=vendor:PXEClient,1,0.0.0.0
        !           387: 
        !           388: # Send microsoft-specific option to tell windows to release the DHCP lease
        !           389: # when it shuts down. Note the "i" flag, to tell dnsmasq to send the
        !           390: # value as a four-byte integer - that's what microsoft wants. See
        !           391: # http://technet2.microsoft.com/WindowsServer/en/library/a70f1bb7-d2d4-49f0-96d6-4b7414ecfaae1033.mspx?mfr=true
        !           392: #dhcp-option=vendor:MSFT,2,1i
        !           393: 
        !           394: # Send the Encapsulated-vendor-class ID needed by some configurations of
        !           395: # Etherboot to allow is to recognise the DHCP server.
        !           396: #dhcp-option=vendor:Etherboot,60,"Etherboot"
        !           397: 
        !           398: # Send options to PXELinux. Note that we need to send the options even
        !           399: # though they don't appear in the parameter request list, so we need
        !           400: # to use dhcp-option-force here.
        !           401: # See http://syslinux.zytor.com/pxe.php#special for details.
        !           402: # Magic number - needed before anything else is recognised
        !           403: #dhcp-option-force=208,f1:00:74:7e
        !           404: # Configuration file name
        !           405: #dhcp-option-force=209,configs/common
        !           406: # Path prefix
        !           407: #dhcp-option-force=210,/tftpboot/pxelinux/files/
        !           408: # Reboot time. (Note 'i' to send 32-bit value)
        !           409: #dhcp-option-force=211,30i
        !           410: 
        !           411: # Set the boot filename for netboot/PXE. You will only need
        !           412: # this is you want to boot machines over the network and you will need
        !           413: # a TFTP server; either dnsmasq's built in TFTP server or an
        !           414: # external one. (See below for how to enable the TFTP server.)
        !           415: #dhcp-boot=pxelinux.0
        !           416: 
        !           417: # The same as above, but use custom tftp-server instead machine running dnsmasq
        !           418: #dhcp-boot=pxelinux,server.name,192.168.1.100
        !           419: 
        !           420: # Boot for Etherboot gPXE. The idea is to send two different
        !           421: # filenames, the first loads gPXE, and the second tells gPXE what to
        !           422: # load. The dhcp-match sets the gpxe tag for requests from gPXE.
        !           423: #dhcp-match=set:gpxe,175 # gPXE sends a 175 option.
        !           424: #dhcp-boot=tag:!gpxe,undionly.kpxe
        !           425: #dhcp-boot=mybootimage
        !           426: 
        !           427: # Encapsulated options for Etherboot gPXE. All the options are
        !           428: # encapsulated within option 175
        !           429: #dhcp-option=encap:175, 1, 5b         # priority code
        !           430: #dhcp-option=encap:175, 176, 1b       # no-proxydhcp
        !           431: #dhcp-option=encap:175, 177, string   # bus-id
        !           432: #dhcp-option=encap:175, 189, 1b       # BIOS drive code
        !           433: #dhcp-option=encap:175, 190, user     # iSCSI username
        !           434: #dhcp-option=encap:175, 191, pass     # iSCSI password
        !           435: 
        !           436: # Test for the architecture of a netboot client. PXE clients are
        !           437: # supposed to send their architecture as option 93. (See RFC 4578)
        !           438: #dhcp-match=peecees, option:client-arch, 0 #x86-32
        !           439: #dhcp-match=itanics, option:client-arch, 2 #IA64
        !           440: #dhcp-match=hammers, option:client-arch, 6 #x86-64
        !           441: #dhcp-match=mactels, option:client-arch, 7 #EFI x86-64
        !           442: 
        !           443: # Do real PXE, rather than just booting a single file, this is an
        !           444: # alternative to dhcp-boot.
        !           445: #pxe-prompt="What system shall I netboot?"
        !           446: # or with timeout before first available action is taken:
        !           447: #pxe-prompt="Press F8 for menu.", 60
        !           448: 
        !           449: # Available boot services. for PXE.
        !           450: #pxe-service=x86PC, "Boot from local disk"
        !           451: 
        !           452: # Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.
        !           453: #pxe-service=x86PC, "Install Linux", pxelinux
        !           454: 
        !           455: # Loads <tftp-root>/pxelinux.0 from TFTP server at 1.2.3.4.
        !           456: # Beware this fails on old PXE ROMS.
        !           457: #pxe-service=x86PC, "Install Linux", pxelinux, 1.2.3.4
        !           458: 
        !           459: # Use bootserver on network, found my multicast or broadcast.
        !           460: #pxe-service=x86PC, "Install windows from RIS server", 1
        !           461: 
        !           462: # Use bootserver at a known IP address.
        !           463: #pxe-service=x86PC, "Install windows from RIS server", 1, 1.2.3.4
        !           464: 
        !           465: # If you have multicast-FTP available,
        !           466: # information for that can be passed in a similar way using options 1
        !           467: # to 5. See page 19 of
        !           468: # http://download.intel.com/design/archives/wfm/downloads/pxespec.pdf
        !           469: 
        !           470: 
        !           471: # Enable dnsmasq's built-in TFTP server
        !           472: #enable-tftp
        !           473: 
        !           474: # Set the root directory for files available via FTP.
        !           475: #tftp-root=/var/ftpd
        !           476: 
        !           477: # Make the TFTP server more secure: with this set, only files owned by
        !           478: # the user dnsmasq is running as will be send over the net.
        !           479: #tftp-secure
        !           480: 
        !           481: # This option stops dnsmasq from negotiating a larger blocksize for TFTP
        !           482: # transfers. It will slow things down, but may rescue some broken TFTP
        !           483: # clients.
        !           484: #tftp-no-blocksize
        !           485: 
        !           486: # Set the boot file name only when the "red" tag is set.
        !           487: #dhcp-boot=tag:red,pxelinux.red-net
        !           488: 
        !           489: # An example of dhcp-boot with an external TFTP server: the name and IP
        !           490: # address of the server are given after the filename.
        !           491: # Can fail with old PXE ROMS. Overridden by --pxe-service.
        !           492: #dhcp-boot=/var/ftpd/pxelinux.0,boothost,192.168.0.3
        !           493: 
        !           494: # If there are multiple external tftp servers having a same name
        !           495: # (using /etc/hosts) then that name can be specified as the
        !           496: # tftp_servername (the third option to dhcp-boot) and in that
        !           497: # case dnsmasq resolves this name and returns the resultant IP
        !           498: # addresses in round robin fasion. This facility can be used to
        !           499: # load balance the tftp load among a set of servers.
        !           500: #dhcp-boot=/var/ftpd/pxelinux.0,boothost,tftp_server_name
        !           501: 
        !           502: # Set the limit on DHCP leases, the default is 150
        !           503: #dhcp-lease-max=150
        !           504: 
        !           505: # The DHCP server needs somewhere on disk to keep its lease database.
        !           506: # This defaults to a sane location, but if you want to change it, use
        !           507: # the line below.
        !           508: #dhcp-leasefile=/var/lib/misc/dnsmasq.leases
        !           509: 
        !           510: # Set the DHCP server to authoritative mode. In this mode it will barge in
        !           511: # and take over the lease for any client which broadcasts on the network,
        !           512: # whether it has a record of the lease or not. This avoids long timeouts
        !           513: # when a machine wakes up on a new network. DO NOT enable this if there's
        !           514: # the slightest chance that you might end up accidentally configuring a DHCP
        !           515: # server for your campus/company accidentally. The ISC server uses
        !           516: # the same option, and this URL provides more information:
        !           517: # http://www.isc.org/files/auth.html
        !           518: #dhcp-authoritative
        !           519: 
        !           520: # Run an executable when a DHCP lease is created or destroyed.
        !           521: # The arguments sent to the script are "add" or "del",
        !           522: # then the MAC address, the IP address and finally the hostname
        !           523: # if there is one.
        !           524: #dhcp-script=/bin/echo
        !           525: 
        !           526: # Set the cachesize here.
        !           527: #cache-size=150
        !           528: 
        !           529: # If you want to disable negative caching, uncomment this.
        !           530: #no-negcache
        !           531: 
        !           532: # Normally responses which come from /etc/hosts and the DHCP lease
        !           533: # file have Time-To-Live set as zero, which conventionally means
        !           534: # do not cache further. If you are happy to trade lower load on the
        !           535: # server for potentially stale date, you can set a time-to-live (in
        !           536: # seconds) here.
        !           537: #local-ttl=
        !           538: 
        !           539: # If you want dnsmasq to detect attempts by Verisign to send queries
        !           540: # to unregistered .com and .net hosts to its sitefinder service and
        !           541: # have dnsmasq instead return the correct NXDOMAIN response, uncomment
        !           542: # this line. You can add similar lines to do the same for other
        !           543: # registries which have implemented wildcard A records.
        !           544: #bogus-nxdomain=64.94.110.11
        !           545: 
        !           546: # If you want to fix up DNS results from upstream servers, use the
        !           547: # alias option. This only works for IPv4.
        !           548: # This alias makes a result of 1.2.3.4 appear as 5.6.7.8
        !           549: #alias=1.2.3.4,5.6.7.8
        !           550: # and this maps 1.2.3.x to 5.6.7.x
        !           551: #alias=1.2.3.0,5.6.7.0,255.255.255.0
        !           552: # and this maps 192.168.0.10->192.168.0.40 to 10.0.0.10->10.0.0.40
        !           553: #alias=192.168.0.10-192.168.0.40,10.0.0.0,255.255.255.0
        !           554: 
        !           555: # Change these lines if you want dnsmasq to serve MX records.
        !           556: 
        !           557: # Return an MX record named "maildomain.com" with target
        !           558: # servermachine.com and preference 50
        !           559: #mx-host=maildomain.com,servermachine.com,50
        !           560: 
        !           561: # Set the default target for MX records created using the localmx option.
        !           562: #mx-target=servermachine.com
        !           563: 
        !           564: # Return an MX record pointing to the mx-target for all local
        !           565: # machines.
        !           566: #localmx
        !           567: 
        !           568: # Return an MX record pointing to itself for all local machines.
        !           569: #selfmx
        !           570: 
        !           571: # Change the following lines if you want dnsmasq to serve SRV
        !           572: # records.  These are useful if you want to serve ldap requests for
        !           573: # Active Directory and other windows-originated DNS requests.
        !           574: # See RFC 2782.
        !           575: # You may add multiple srv-host lines.
        !           576: # The fields are <name>,<target>,<port>,<priority>,<weight>
        !           577: # If the domain part if missing from the name (so that is just has the
        !           578: # service and protocol sections) then the domain given by the domain=
        !           579: # config option is used. (Note that expand-hosts does not need to be
        !           580: # set for this to work.)
        !           581: 
        !           582: # A SRV record sending LDAP for the example.com domain to
        !           583: # ldapserver.example.com port 389
        !           584: #srv-host=_ldap._tcp.example.com,ldapserver.example.com,389
        !           585: 
        !           586: # A SRV record sending LDAP for the example.com domain to
        !           587: # ldapserver.example.com port 389 (using domain=)
        !           588: #domain=example.com
        !           589: #srv-host=_ldap._tcp,ldapserver.example.com,389
        !           590: 
        !           591: # Two SRV records for LDAP, each with different priorities
        !           592: #srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,1
        !           593: #srv-host=_ldap._tcp.example.com,ldapserver.example.com,389,2
        !           594: 
        !           595: # A SRV record indicating that there is no LDAP server for the domain
        !           596: # example.com
        !           597: #srv-host=_ldap._tcp.example.com
        !           598: 
        !           599: # The following line shows how to make dnsmasq serve an arbitrary PTR
        !           600: # record. This is useful for DNS-SD. (Note that the
        !           601: # domain-name expansion done for SRV records _does_not
        !           602: # occur for PTR records.)
        !           603: #ptr-record=_http._tcp.dns-sd-services,"New Employee Page._http._tcp.dns-sd-services"
        !           604: 
        !           605: # Change the following lines to enable dnsmasq to serve TXT records.
        !           606: # These are used for things like SPF and zeroconf. (Note that the
        !           607: # domain-name expansion done for SRV records _does_not
        !           608: # occur for TXT records.)
        !           609: 
        !           610: #Example SPF.
        !           611: #txt-record=example.com,"v=spf1 a -all"
        !           612: 
        !           613: #Example zeroconf
        !           614: #txt-record=_http._tcp.example.com,name=value,paper=A4
        !           615: 
        !           616: # Provide an alias for a "local" DNS name. Note that this _only_ works
        !           617: # for targets which are names from DHCP or /etc/hosts. Give host
        !           618: # "bert" another name, bertrand
        !           619: #cname=bertand,bert
        !           620: 
        !           621: # For debugging purposes, log each DNS query as it passes through
        !           622: # dnsmasq.
        !           623: #log-queries
        !           624: 
        !           625: # Log lots of extra information about DHCP transactions.
        !           626: #log-dhcp
        !           627: 
        !           628: # Include another lot of configuration options.
        !           629: #conf-file=/etc/dnsmasq.more.conf
        !           630: #conf-dir=/etc/dnsmasq.d

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