NTP - rlaich/avctrec GitHub Wiki

Configure NTP settings (Setup local NTP server in CentOS )

  1. vi /etc/ntp.conf

    server 127.127.1.0

    fudge 127.127.1.0 statum 10

    restrict 127.0.0.1

    restrict -6 ::1

  2. service ntpd restart

Configure iptables

  1. iptables -A INPUT -p all -i eth0 --dport 123 -j ACCEPT

  2. Mark icmp

    vi /etc/sysconfig/iptables

    #-A INPUT -j REJECT --reject-with icmp-host-prohibited

    #-A FORWARD -j REJECT --reject-with icmp-host-prohibited

  3. service iptables save

    service iptables restart