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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
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