setup dnsmasq on CentOS6

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　　yum -y install dnsmasq
　　groupadd -r dnsmasq
　　useradd -r -g dnsmasq dnsmasq
　　vi /etc/dnsmasq.conf
　　listen-address=127.0.0.1,192.168.2.5
　　port=53
　　bind-interfaces
　　user=dnsmasq
　　group=dnsmasq
　　pid-file=/var/run/dnsmasq.pid
　　domain-needed
　　bogus-priv
　　no-hosts
　　dns-forward-max=150
　　cache-size=1000
　　neg-ttl=3600
　　resolv-file=/etc/resolv.dnsmasq
　　no-poll
　　vi /etc/resolv.dnsmasq
　　nameserver 192.168.2.1
　　vi /etc/resolv.conf
　　nameserver 127.0.0.1
　　service dnsmasq start; chkconfig dnsmasq on
　　Appendix I – Full configuration file
　　#
　　# Configuration file for dnsmasq acting as a caching nameserver.
　　#
　　# 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.
　　#
　　# Updated versions of this configuration file may be available at:
　　#
　　#   http://www.g-loaded.eu/2010/09/18/caching-nameserver-using-dnsmasq/
　　#
　　#
　　# Basic server configuration
　　#
　　listen-address=127.0.0.1
　　port=53
　　bind-interfaces
　　user=dnsmasq
　　group=dnsmasq
　　pid-file=/var/run/dnsmasq.pid
　　#
　　# Logging
　　#
　　#log-facility=/var/log/dnsmasq.log
　　#log-queries
　　#
　　# Name resolution options
　　#
　　domain-needed
　　bogus-priv
　　no-hosts
　　dns-forward-max=150
　　cache-size=1000
　　#no-negcache
　　neg-ttl=3600
　　resolv-file=/etc/resolv.dnsmasq
　　no-poll
　　Appendix II – Logging to file
　　Before dnsmasq starts logging to file it is required to set the path to the logfile in the log-facility option inside /etc/dnsmasq.conf.
　　log-facility=/var/log/dnsmasq.log
　　To ensure proper rotation of the log file you should use the following logrotate configuration:
　　/var/log/dnsmasq.log {
　　monthly
　　missingok
　　notifempty
　　delaycompress
　　sharedscripts
　　postrotate

[ ! -f /var/run/dnsmasq.pid ] || kill -USR2 `cat /var/run/dnsmasq.pid`

　　endscript
　　create 0640 dnsmasq dnsmasq
　　}
　　Save the above configuration in /etc/logrotate.d/dnsmasq
　　please refer : http://www.g-loaded.eu/2010/09/18/caching-nameserver-using-dnsmasq/