ntp/ntp.conf

   1 #
   2 # /etc/ntp/ntp.conf: ntp configuration
   3 #
   4
   5 ###############################################################################
   6 # Default paths
   7
   8 logfile         /var/log/ntp.log
   9 pidfile         /var/run/ntp/ntpd.pid
  10 driftfile       /var/lib/ntp/ntp.drift
  11 #statsdir       /var/lib/ntp/stats/
  12
  13 ###############################################################################
  14 # Authentication stuff
  15 #
  16 # keys /etc/ntp/ntp.keys            # path for keys file
  17 # trustedkey 1 2 3 4 5 6 14 15  # define trusted keys
  18 # requestkey 15                 # key (7) for accessing server variables
  19 # controlkey 15                 # key (6) for accessing server variables
  20
  21 ###############################################################################
  22 # Undisciplined Local Clock. This is a fake driver intended for backup
  23 # and when no outside source of synchronized time is available.
  24
  25 server 127.127.1.0              # local clock (LCL)
  26 fudge  127.127.1.0 stratum 10   # LCL is unsynchronized
  27
  28
  29 ## Generic DCF77 clock on serial port (Conrad DCF77)
  30 ## Address:     127.127.8.u
  31 ## Serial Port: /dev/refclock-u
  32 ## Sample project: http://www.obbl-net.de/dcf77.html by Martin Opel
  33 ##
  34 ## u = Number of your serial port
  35 ##
  36 ## (create soft link /dev/refclock-0 to the particular ttyS?)
  37 ##
  38 # server 127.127.8.0 mode 5 prefer
  39
  40
  41 ###############################################################################
  42 # Specify the servers you are interested in
  43
  44 server ntps1-0.cs.tu-berlin.de prefer
  45 server ntps1-1.cs.tu-berlin.de
  46 server ntp1.ptb.de
  47 server ntp1.fau.de
  48
  49 ###############################################################################
  50 # Then we restrict the type of access you allow these servers.
  51 # Were not allowing them to modify or query our Linux NTP server
  52
  53 restrict default ignore notrust nomodify notrap
  54 restrict 127.0.0.1
  55 #restrict <YOUR_IP_HERE>
  56 restrict ntps1-0.cs.tu-berlin.de mask 255.255.255.255 nomodify notrap noquery
  57 restrict ntps1-1.cs.tu-berlin.de mask 255.255.255.255 nomodify notrap noquery
  58 restrict ntp1.ptb.de mask 255.255.255.255 nomodify notrap noquery
  59 restrict ntp1.fau.de mask 255.255.255.255 nomodify notrap noquery
  60
  61 # Now list the NTP clients on our home network which should be able to query
  62 # our server for the time (notice that the noquery has been removed)
  63
  64 #restrict 192.168.0.0 mask 255.255.255.0
  65
  66 # End of file