# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
restrict default kod nomodify notrap nopeer noquery
restrict -6 default kod nomodify notrap nopeer noquery

# Permit all access over the loopback interface.  This could
# be tightened as well, but to do so would effect some of
# the administrative functions.
restrict 127.0.0.1 
restrict -6 ::1

# Hosts on local network are less restricted.
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
#server 0.fedora.pool.ntp.org dynamic
#server 1.fedora.pool.ntp.org dynamic
#server 2.fedora.pool.ntp.org dynamic

#broadcast 192.168.1.255 key 42		# broadcast server
#broadcastclient			# broadcast client
#broadcast 224.0.1.1 key 42		# multicast server
#multicastclient 224.0.1.1		# multicast client
#manycastserver 239.255.254.254		# manycast server
#manycastclient 239.255.254.254 key 42	# manycast client

# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available. 
# server	127.127.1.0	# local clock
# fudge	127.127.1.0 stratum 10	

# Drift file.  Put this in a directory which the daemon can write to.
# No symbolic links allowed, either, since the daemon updates the file
# by creating a temporary in the same directory and then rename()'ing
# it to the file.
driftfile /var/lib/ntp/drift

# Key file containing the keys and key identifiers used when operating
# with symmetric key cryptography. 
# keys /etc/ntp/keys

# Specify the key identifiers which are trusted.
#trustedkey 4 8 42

# Specify the key identifier to use with the ntpdc utility.
#requestkey 8

# Specify the key identifier to use with the ntpq utility.
#controlkey 8

server ntp1.lsu.edu
restrict ntp1.lsu.edu mask 255.255.255.255 nomodify notrap noquery
server ntp2.lsu.edu
restrict ntp2.lsu.edu mask 255.255.255.255 nomodify notrap noquery
server ntp3.lsu.edu
restrict ntp3.lsu.edu mask 255.255.255.255 nomodify notrap noquery

###server ntp.alaska.edu
###server    199.165.76.11
###restrict  199.165.76.11  mask 255.255.255.255 nomodify notrap

###server clepsydra.dec.com
###server   204.123.2.5
###restrict 204.123.2.5 mask 255.255.255.255 nomodify notrap

##server clock.isc.org
##server   149.20.64.28
##restrict 149.20.64.28  mask 255.255.255.255 nomodify notrap

###server clock.via.net
###server   209.81.9.7
###restrict 209.81.9.7  mask 255.255.255.255 nomodify notrap

###server gpstime.trimble.com
###server  
###restrict  mask 255.255.255.255 nomodify notrap

####server montpelier.ilan.caltech.edu
#server   192.12.19.20
#restrict 192.12.19.20 mask 255.255.255.255 nomodify notrap

###server nist1.aol-ca.truetime.com
##server   207.200.81.113
##restrict 207.200.81.113 mask 255.255.255.255 nomodify notrap

###server nist1.datum.com
##server   50.17.184.107
##restrict 50.17.184.107 mask 255.255.255.255 nomodify notrap

#####server nist1-sj.glassey.com
##server   216.171.124.36
##restrict 216.171.124.36 mask 255.255.255.255 nomodify notrap

#####server ntp-cup.external.hp.com
##server   192.6.38.127
##restrict 192.6.38.127 mask 255.255.255.255 nomodify notrap

####ntp-aa.internet2.edu
###server 207.75.164.74
###restrict 207.75.164.74 mask 255.255.255.255 nomodify notrap

####server tick.gpsclock.com
#server   208.91.196.55
#restrict 208.91.196.55 mask 255.255.255.255 nomodify notrap

####server tick.ucla.edu
#server   164.67.62.194
#restrict 164.67.62.194 mask 255.255.255.255 nomodify notrap

###server timekeeper.isi.edu
###server   128.9.176.30
###restrict 128.9.176.30 mask 255.255.255.255 nomodify notrap

###server tock.gpsclock.com
##server   208.91.196.55
##restrict 208.91.196.55 mask 255.255.255.255 nomodify notrap

###server tick.cerias.purdue.edu
##server   128.10.254.7
##restrict 128.10.254.7 mask 255.255.255.255 nomodify notrap

###server usno.pa-x.dec.com
###server   204.123.2.72
###restrict 204.123.2.72 mask 255.255.255.255 nomodify notrap

###server navobs1.usnogps.navy.mil
###server   204.34.198.40
###restrict 204.34.198.40 mask 255.255.255.255 nomodify notrap

###server time-a.timefreq.bldrdoc.gov
###server   132.163.4.101
###restrict 132.163.4.101 mask 255.255.255.255 nomodify notrap

###server tick.usno.navy.mil
###server   192.5.41.40
###restrict 192.5.41.40 mask 255.255.255.255 nomodify notrap
# ipv6
###server ntp6a.rollernet.us
###server ntp6b.rollernet.us
## ipv6.tick.mattnordhoff.com
## ipv6.ntp2.mattnordhoff.com
## ipv6.dfw2.ntp.mattnordhoff.com
## ipv6.dfw1.ntp.mattnordhoff.com
## usanc01.sixxs.net
## usbos01.sixxs.net
## usqas01.sixxs.net
## usdal01.sixxs.net
## usphx01.sixxs.net
## usmia01.sixxs.net