#!/bin/bash

function _gen_ntp_keys() {

cnt=`cat /etc/ntp/keys | grep MD5 | wc -l`

if [[ $cnt -eq 0 ]]; then

olddir=`pwd`

cd /tmp/

rm -rf ntpkey*

ntp-keygen -M

cat `ls ntpkey* | head -1` | grep MD5 > /etc/ntp/keys

rm -rf ntpkey*

cd $olddir

fi

}

function _install_and_configure_ntp() {

service ntpd stop

local file=/etc/ntp.conf

local line=""

_gen_ntp_keys

echo "restrict default kod nomodify notrap nopeer noquery" > $file

echo "restrict 0.0.0.0 mask 0.0.0.0 kod nomodify notrap nopeer noquery notrust" >> $file

echo "restrict 127.0.0.1 mask 255.255.0.0 kod" >> $file

echo "restrict 127.0.0.1" >> $file

echo "server 127.127.1.0 fudge" >> $file

echo "127.127.1.0 stratum 8" >> $file

echo "keys /etc/ntp/keys" >> $file

echo "trustedkey 1 2 3 4 5 6 7 8 9 10" >> $file

service ntpd restart

chkconfig ntpd on

}

function setup_ntp() {

_install_and_configure_ntp

}