輕量級的DNS服務器--DNSmasq
阿新 • • 發佈:2017-07-05
輕量級的dns服務器--dnsmasq
簡介:
dnsmasq時一款輕量級的DNS服務器,同時也是開源項目,配置簡單快捷,Dnsmasq提供DNS緩存和DHCP服務功能。作為域名解析服務器(DNS),dnsmasq可以通過緩存DNS請求來提高對訪問過的網址的連接速度。作為DHCP服務器,dnsmasq可以為局域網電腦提供內網ip地址和路由,DNS和DHCP兩個功能可以同時或分別單獨實現。dnsmasq輕量且易配置,此外它還自帶了一個PXE服務器以及對郵件服務器的mx記錄的支持,jabber的srv記錄的支持等。
部署環境:
Centos 6.5 x86_64操作系統
dnsmasq時base源中的軟件包,可以直接安裝部署:
# yum list | grep dnsmasq dnsmasq.x86_64 2.48-17.el6 @base dnsmasq-utils.x86_64 2.48-17.el6 base
安裝dnsmasq軟件包:
#yum -y install dnsmasq
操作之前先做備份:
# cp /etc/dnsmasq.conf /etc/dnsmasq.conf.bak
#查看dnsmasq的安裝文件路徑:
# rpm -ql dnsmasq /etc/dbus-1/system.d/dnsmasq.conf /etc/dnsmasq.conf #主配置文件 /etc/dnsmasq.d /etc/rc.d/init.d/dnsmasq /usr/sbin/dnsmasq /usr/share/doc/dnsmasq-2.48 /usr/share/doc/dnsmasq-2.48/CHANGELOG /usr/share/doc/dnsmasq-2.48/COPYING /usr/share/doc/dnsmasq-2.48/DBus-interface /usr/share/doc/dnsmasq-2.48/FAQ /usr/share/doc/dnsmasq-2.48/doc.html /usr/share/doc/dnsmasq-2.48/setup.html /usr/share/man/man8/dnsmasq.8.gz /var/lib/dnsmasq
將本地的resolv解析文件配置指向本機:
#echo ‘nameserver 127.0.0.1‘ > /etc/resolv.conf
copy一份作為dnsmasq的解析配置文件:
cp /etc/resolv.conf /etc/resolv.dnsmasq.conf echo ‘nameserver 8.8.8.8‘ > /etc/resolv.dnsmasq.conf
dnsmasq使用到的配置文件如下:
# cat /etc/dnsmasq.conf | grep -v ‘^#‘ | grep -v ‘^$‘ resolv-file=/etc/resolv.dnsmasq.conf strict-order interface=eth0 listen-address=192.168.30.131,127.0.0.1 bind-interfaces addn-hosts=/etc/hosts #域名映射文件
其他兩個配置文件的內容:
[[email protected] etc]# cat /etc/resolv.conf nameserver 127.0.0.1 [[email protected] etc]# cat /etc/resolv.dnsmasq.conf nameserver 8.8.8.8 #4個8谷歌的dns服務器,可能會比較慢 nameserver 114.114.114.114
添加域名映射
# cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.30.128 sh-puppet-master.com 192.168.30.130 sh-puppet-node1.com 192.168.30.131 sh-puppet-node2.com
啟動dnsmasq服務:
# /etc/init.d/dnsmasq restart Shutting down dnsmasq: [ OK ] Starting dnsmasq: [ OK ]
測試查看域名解析的ip:
# dig sh-puppet-node2.com
為了防止本地域名可能會和公網上的一些域名重復,所以改為127.0.0.1.
[[email protected] ~]# cat /etc/resolv.conf ; generated by /sbin/dhclient-script search shjygw com #nameserver 202.96.209.5 nameserver 127.0.0.1 [[email protected] ~]# cat /etc/resolv.dnsmasq.conf nameserver 127.0.0.1
測試ping百度發現不ok,但是不影響內網域名解析:
[[email protected] ~]# ping www.baidu.com
ping: unknown host
www.baidu.com
說明:圖片毀壞就不展示了,有空補上.
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輕量級的DNS服務器--DNSmasq