# /etc/ntp.conf, configuration for ntpd; see ntp.conf( 5 ) for help

driftfile /var/lib/ntp/ntp.drift


# Enable this if you want statistics to be logged.
statsdir /var/log/ntpstats/

statistics loopstats peerstats clockstats
filegen loopstats file loopstats type day enable
filegen peerstats file peerstats type day enable
filegen clockstats file clockstats type day enable


# You do need to talk to an NTP server or two (or three).
server ntp1.imvp.ru
server ntp2.imvp.ru
server ntp3.imvp.ru
server ntp21.imvp.ru
server time-a.nist.gov
server NTP1.NL.NET
server ntp.ubuntu.com


# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
# details.  The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions>
# might also be helpful.
#
# Note that "restrict" applies to both servers and clients, so a configuration
# that might be intended to block requests from certain clients could also end
# up blocking replies from your own upstream servers.

# By default, exchange time with everybody, but don't allow configuration.
restrict - 4  default kod notrap nomodify nopeer noquery
restrict - 6  default kod notrap nomodify nopeer noquery

# Local users may interrogate the ntp server more closely.
restrict  127 . 0 . 0 . 1 
restrict :: 1 

# Clients from this (example!) subnet have unlimited access, but only if
# cryptographically authenticated.
#restrict  192 . 168 . 123 . 0  mask  255 . 255 . 255 . 0  notrust


# If you want to provide time to your local subnet, change the next line.
# (Again, the address is an example only.)
#broadcast  192 . 168 . 123 . 255 

# If you want to listen to time broadcasts on your local subnet, de-comment the
# next lines.  Please do this only if you trust everybody on the network!
#disable auth
#broadcastclient

sudo iptables -A INPUT -p udp --dport  123  -j ACCEPT

sa@box:~$ sudo ntpdate -b ntp1.imvp.ru
 16  Sep  08 : 32 : 49  ntpdate[ 10583 ]: no server suitable for synchronization found

netstat -tln