在安装成功后，运行了一段时间发现DNS服务无法正常提供，后研究发现DNS服务所在主机无法PING访问外网，提示：connect: Network is unreachable，经研究查阅资料后解决：（配置CentOS网卡信息）
NM_CONTROLLED=no
自定义配置文件dnsmasq.conf
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#dnsmasq config, for a complete example, see: # http://oss.segetech.com/intra/srv/dnsmasq.conf #log all dns queries log-queries #dont use hosts nameservers no-resolv #use cloudflare as default nameservers, prefer 1^4 server=114.114.114.114 server=223.6.6.6 strict-order #serve all .company queries using a specific nameserver server=/company/10.0.0.1 #explicitly define host-ip mappings address=/myhost.company/10.0.0.2 address=/a.abc.ef/10.1.0.1 address=/b.abc.ef/10.2.0.2
# # /etc/dnsmasq.conf (0644): server dnsmasq configuration #
# 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.
# 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) # uneccessarily. If you have a dial-on-demand link they also stop # these requests from bringing up the link uneccessarily.
# Never forward plain names (without a dot or domain part) domain-needed # Never forward addresses in the non-routed address spaces. bogus-priv
# 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. # 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 doubleclick.net to a local # webserver. #address=/doubleclick.net/127.0.0.1
# 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=eth1 # 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= # 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 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
# 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
# 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 with a network-id, so that # some DHCP options may be set only for this network. #dhcp-range=red,192.168.0.50,192.168.0.150
# 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 permissble to give name,adddress 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 the machine which says it's 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 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,net:red
# Send extra options which are tagged as "red" to # any machine with ethernet address starting 11:22:33: #dhcp-host=11:22:33:*:*:*,net:red
# Ignore any clients which are specified in dhcp-host lines # or /etc/ethers. Equivalent to ISC "deny unkown-clients". # This relies on the special "known" tag which is set when # a host is matched. #dhcp-ignore=#known
# Send extra options which are tagged as "red" to any machine whose # DHCP vendorclass string includes the substring "Linux" #dhcp-vendorclass=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=red,accounts
# Send extra options which are tagged as "red" to any machine whose # MAC address matches the pattern. #dhcp-mac=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
# 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 net: part must precede the option: part. #dhcp-option = net: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 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 #dhcp-option=47 # empty netbios scope.
# 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 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 BOOTP. 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
# Enable dnsmasq's built-in TFTP server #enable-tftp
# Set the root directory for files availble via FTP. #tftp-root=/var/ftpd
# 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
# Set the boot file name only when the "red" tag is set. #dhcp-boot=net:red,pxelinux.red-net
# An example of dhcp-boot with an external server: the name and IP # address of the server are given after the filename. #dhcp-boot=/var/ftpd/pxelinux.0,boothost,192.168.0.3
# 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 slighest 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/index.pl?/sw/dhcp/authoritative.php #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 form /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
# 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 289 #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 289 (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"