# mnordhoff:
#
# Simple client ntp.conf for NTP 4.2.4. See also ntp.conf.4.2.6.
#
# Uses my NTP servers along with Ubuntu's.
#
# Acts as a loosely rate-limited server. Public status queries are enabled.
#
# Based on Ubuntu Oneiric's 4.2.6.p2+dfsg-1ubuntu12 file, with my minimum
# updates. (Yes, 4.2.6. It doesn't use any 4.2.6-specific features.)

# /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

# Specify one or more NTP servers.

# mnordhoff: My servers.
server tick.mattnordhoff.com iburst
server ntp2.mattnordhoff.com iburst
# mnordhoff: My pool, in case I add more servers.
server ntp.mattnordhoff.com iburst

# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for
# more information.
#
# mnordhoff: The 2 pool is IPv6-enabled, so prefer it.
#server 0.ubuntu.pool.ntp.org
#server 1.ubuntu.pool.ntp.org
server 2.ubuntu.pool.ntp.org
#server 3.ubuntu.pool.ntp.org

# Use Ubuntu's ntp server as a fallback.
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.
# mnordhoff: Allow status queries and turn on rate-limiting.
restrict -4 default kod notrap nomodify nopeer limited # noquery
restrict -6 default kod notrap nomodify nopeer limited # 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

# mnordhoff: Rate-limit abusive users
# Values are 2 ** N seconds.
# 2 (4 seconds) on average, 0 (1 second) ever.
discard average 2 minimum 0