I am trying to setup my Debian 6 (Squeeze) VM to act as a local time server for my network. I have it set to sync with
tock.usno.navy.mil which is a stratum 1 server.
I am having some problems finding any information on how to setup the ntp daemon to serve the time to clients requesting the time. I have looked through the ntpd man page and that was probably the best doc I found. support.ntp.org was pretty much useless to me, the documentation I found was talking more about how NTP works not how to configure a server.
I also noticed I am not getting anything in my logs about being synced with the server that I am listed.
Any help anyone can offer would be great, I am not sure what is wrong. I am sure it is something I am doing. I had a previous time server running but my SAN blew up and I was not making backups since it was for testing. So I have no old config to look at.
Here is a copy of
ntp.conf since there is nothing in here that has a any personal information I thought posting might help.
# /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 ntp.your-provider.example # pool.ntp.org maps to about 1000 low-stratum NTP servers. Your server will # pick a different set every time it starts up. Please consider joining the # pool: <http://www.pool.ntp.org/join.html> server tock.usno.navy.mil iburst # 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 restrict 10.0.0.0 mask 255.255.255.0 notrap nomodify # 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
Here the output from
root@ns01:/home/ns01# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== ntp1.usno.navy. .USNO. 1 u 43 64 1 34.747 -2891.0 1669.51
Output from iptables
Output from `iptables -L -n -v` Chain INPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain FORWARD (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes) pkts bytes target prot opt in out source destination
When I remove the line
restrict 10.0.0.0 mask 255.255.255.0 notrap nomodify from my config ntp seems to spring to life. This is what I see now when I look at
remote refid st t when poll reach delay offset jitter ============================================================================== -barricade.rack9 18.104.22.168 2 u 39 64 377 37.887 -2977.7 3.180 *gallifrey.chpc. 22.214.171.124 2 u 26 64 377 68.155 -2969.0 3.024 +clock.trit.net 126.96.36.199 2 u 2 64 377 83.146 -2972.0 3.756 +ntp1.Housing.Be 188.8.131.52 3 u 63 64 377 105.803 -2972.6 2.698
Test Desktop ifconfig output (requested by MadHatter)
eth0 Link encap:Ethernet HWaddr 08:00:27:59:2d:3a inet addr:10.0.0.21 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fe59:2d3a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:62103 errors:0 dropped:0 overruns:0 frame:0 TX packets:51822 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:10339609 (9.8 MiB) TX bytes:7249927 (6.9 MiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:56 errors:0 dropped:0 overruns:0 frame:0 TX packets:56 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:5066 (4.9 KiB) TX bytes:5066 (4.9 KiB)