Slow while connecting to XINETD servers

1. Check the file /etc/sysconfig/network-scripts/ifcfg-eth0 first, then the file /etc/resolvconf/run/interface/eth0. If the service resolvconf is running, check /etc/resolvconf/resolv.conf.d/tail to make sure only 127.0.0.1 is listed as nameserver (named running on the localhost). Otherwise run the following commands to stop resolvconf then edit /etc/resolv.conf
   service resolvconf stop
chkconfig --del resolvconf


2. Add a reverse lookup zone for 192.168.1.0 to /etc/named.conf of the nameserver
   zone "1.168.192.in-addr.arpa" {
type master;
file "reverse/named.intranet";
};
   Then run the following command:
   service named restart