[ntp:questions] change in behavior from RHEL 5 to Ubuntu 9.10

Aaron Bennett systemspoet at gmail.com
Wed Jun 2 18:51:26 UTC 2010


Hi,

I'm puzzling through an odd discrepancy between ntpd on CentOS 5 to
Ubuntu 9.10 -- to wit, with this exact same config on both os's:


restrict default ignore
restrict 127.0.0.1
restrict 140.232.0.0 mask 255.255.0.0 nomodify
restrict 10.0.0.0 mask 255.0.0.0 nomodify
server 0.us.pool.ntp.org iburst
server 1.us.pool.ntp.org iburst
server 2.us.pool.ntp.org iburst
server us.pool.ntp.org iburst
server 0.north-america.pool.ntp.org iburst
server 1.north-america.pool.ntp.org iburst
server 2.north-america.pool.ntp.org iburst
server north-america.pool.ntp.org iburst
server pool.ntp.org iburst
restrict 0.us.pool.ntp.org nomodify nopeer notrap noquery
restrict 1.us.pool.ntp.org nomodify nopeer notrap noquery
restrict 2.us.pool.ntp.org nomodify nopeer notrap noquery
restrict us.pool.ntp.org nomodify nopeer notrap noquery
restrict 0.north-america.pool.ntp.org nomodify nopeer notrap noquery
restrict 1.north-america.pool.ntp.org nomodify nopeer notrap noquery
restrict 2.north-america.pool.ntp.org nomodify nopeer notrap noquery
restrict north-america.pool.ntp.org nomodify nopeer  notrap noquery
restrict pool.ntp.org nomodify nopeer notrap noquery
driftfile /var/lib/ntp/drift

-----

It works -- and has worked, for years, on CentOS 5 (ntp 4.2.2).  On
Ubuntu 9.10 (ntp 4.2.4), all but one of the peer's stay in ".INIT."
mode.

Here's what I see on CentOS:
# ntpq -pn
     remote           refid      st t when poll reach   delay
offset  jitter
==============================================================================
-169.229.70.95   128.32.206.55    3 u  122  128  357  106.503
-4.578   1.546
-169.229.70.201  169.229.128.214  3 u  104  128  377  105.284
1.438   2.655
-206.217.214.4   140.142.16.34    2 u  101  128  377   55.606
14.680   1.750
*207.171.7.152   164.67.62.212    2 u   37  128  377   84.264
4.750   2.255
-173.203.202.87  128.138.188.172  2 u  251  128  376   43.650
8.790   1.185
+190.120.228.181 207.171.30.106   2 u  108  128  377   60.998
5.141   1.975
+129.174.93.11   198.82.1.203     3 u   47  128  377   13.673
7.280   2.511
-216.45.57.38    69.36.224.15     2 u  114  128  377   90.174
11.289   1.775
-169.229.70.183  169.229.128.214  3 u   45  128  377  105.451
3.820   2.095


Here's what I see on Ubuntu:

# ntpq -pn
     remote           refid      st t when poll reach   delay
offset  jitter
==============================================================================
 64.113.32.2     .INIT.          16 u    -   64    0    0.000
0.000   0.000
*198.186.191.229 64.147.116.229   2 u   19   64  353   94.492
0.525   1.091
 66.7.96.2       .INIT.          16 u    -   64    0    0.000
0.000   0.000
 69.65.40.29     .INIT.          16 u    -   64    0    0.000
0.000   0.000
 87.117.229.237  .INIT.          16 u    -   64    0    0.000
0.000   0.000
 72.14.183.39    .INIT.          16 u    -   64    0    0.000
0.000   0.000
 75.144.70.35    .INIT.          16 u    -   64    0    0.000
0.000   0.000
 38.229.71.1     .INIT.          16 u    -   64    0    0.000
0.000   0.000
 64.73.32.134    .INIT.          16 u    -   64    0    0.000
0.000   0.000

>From what I just read at http://support.ntp.org/bin/view/Support/AccessRestrictions#Section_6.5.1.1.3.
, it looks like if you use 'restrict default ignore' then "You must
use an IP address on the restrict line" -- can that be right?   If so,
how can you do that and still use the pool servers?

thanks,

Aaron Bennett




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