Re: setting up NTPd

["Jeff Silberberg" <jsilberberg mindspring com>]

Grrrrrrrrrrrrrr......

    Just learned about /etc/sysconfig/iptables which may be the problem..

    I have been looking at Firewall setup when it might be in the box
itself..

    JMS..

----- Original Message -----
From: "Bret Hughes" <bhughes elevating com>
To: <redhat-list redhat com>
Sent: Wednesday, October 01, 2003 5:29 PM
Subject: Re: setting up NTPd


> On Wed, 2003-10-01 at 15:38, Jeff Silberberg wrote:
> > So,
> >
> > This is right ??
> >
> > [root vc1 root]# ntpq -p
> >      remote           refid      st t when poll reach   delay   offset
jitter
> >
============================================================================
==
> >  LOCAL(0)        LOCAL(0)        10 l    3   64    1    0.000    0.000
0.008
> >  ns1.usg.edu     0.0.0.0         16 u    -   64    0    0.000    0.000
4000.00
> >  ns2.usg.edu     0.0.0.0         16 u    -   64    0    0.000    0.000
4000.00
> >  cs.columbia.edu 0.0.0.0         16 u    -   64    0    0.000    0.000
4000.00
> >
>
> ok .  you are not reaching the servers at all
>
> Is there a firewall between you and the servers?
>
> try ntpq -p ns1.usg.edu
>
> here is what I got on a machine with direct access to the net. I am
> going to preformat the output
>
> [bhughes bretsony bhughes]$ ntpq -p ns1.usg.edu
>      remote           refid      st t when poll reach   delay   offset
jitter
>
============================================================================
==
> +reaper.twc.weat .CDMA.           1 u 1071 1024  377   34.480    0.705
0.580
> +ntp0.mcs.anl.go 0.0.0.0          1 u  496 1024  377   17.060    0.367
0.440
>  152.1.58.124    0.0.0.0         16 -    - 1024    0    0.000    0.000
16000.0
> *navobs1.gatech. .PSC.            1 u 1093 1024  377    2.760   -0.597
0.640
> -209.195.3.50    reaper.twc.weat  2 u  600 1024  377   37.020   -1.918
0.930
> [bhughes bretsony bhughes]$
>
> this tells us that ns1.usg.edu is currently synced to
navobs1.gatech.[edu?]
>
> hmm lets see the ips
>
> [bhughes bretsony bhughes]$ ntpq -pn ns1.usg.edu
>      remote           refid      st t when poll reach   delay   offset
jitter
>
============================================================================
==
> +216.133.140.77  .CDMA.           1 u  468 1024  377   33.870   -0.020
0.550
> +140.221.8.88    0.0.0.0          1 u  917 1024  377   17.060    0.367
0.440
>  152.1.58.124    0.0.0.0         16 -    - 1024    0    0.000    0.000
16000.0
> *130.207.244.240 .PSC.            1 u  489 1024  377    1.560    0.346
0.660
> -209.195.3.50    216.133.140.77   2 u 1020 1024  377   37.020   -1.918
0.930
> [bhughes bretsony bhughes]$
>
>
> [bhughes bretsony bhughes]$ dig -x 130.207.244.240
>
> ; <<>> DiG 9.2.1 <<>> -x 130.207.244.240
> ;; global options:  printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24751
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
>
> ;; QUESTION SECTION:
> ;240.244.207.130.in-addr.arpa. IN PTR
>
> ;; ANSWER SECTION:
> 240.244.207.130.in-addr.arpa. 85802 IN PTR navobs1.gatech.edu.
>
> yup that was a good guess.  Anyway the ntpq documentation page explains
> all this better than I can but suffice it to say that this machine is
> pretty damn close to the top of the food chain.
>
> Trouble is you can't talk to it.  find out why,  Usually firewall issues
> port 123 udp and tcp is what I usually open up.  I don'tremember if it
> uses both or not but lets get it working before we get to semantics.
>
> there is also a debugging techniques page on my 7.3 machine in
>  /usr/share/doc/ntp-4.1.1/
>
> HTH
>
> Bret
>
>
>
>
>
> --
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request redhat com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list