Ok, so it was indeed the firewall, thanks for letting me know! :)
(CCing the centos list in order to close the subject there too)
- Nicolas
On Nov 20, 2007 3:23 PM, Engineer, Gaurav gaurav.engineer@lmco.com wrote:
This worked like a charm. Thanks for all the help!
-----Original Message----- From: Nicolas Sahlqvist [mailto:nicco77@gmail.com] Sent: Tuesday, November 20, 2007 8:36 AM To: Engineer, Gaurav Subject: Re: [CentOS] ntp queries not being answered
Hi Gaurav,
You can check the output of "iptables -L -n" or use "setup" and check out what "Security Level" is set to under "Firewall configuration". In case it's enabled, you can disable it or add "Other ports" under "Customize".
- Nicolas
On Nov 20, 2007 2:20 PM, Engineer, Gaurav gaurav.engineer@lmco.com wrote:
Thanks for the reply Nicolas.
I was thinking it was something dealing with security that might be the problem. Unfortunately, I am totally new to Centos and linux. We
have another team that is responsible for loading processors with the
OS.
So nothing was done besides the initial base loading of the SW and configuring the IP address.
Can you please tell me how to deactivate the firewall (iptables) on the linux box? How to activate the ntp port?
-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Nicolas Sahlqvist Sent: Tuesday, November 20, 2007 8:14 AM To: CentOS mailing list Subject: Re: [CentOS] ntp queries not being answered
On Nov 20, 2007 2:05 PM, Engineer, Gaurav gaurav.engineer@lmco.com wrote:
Hello All,
My name is Gaurav, and I am tasked with configuring a linux box with
NTP.
I am having a problem that I hope you can help me with.
We have installed CentOS V5 on 1 processor down in the lab. The rest
of the
processors on the network are AIX boxes versions 3.2.5 and 5.2. I
worked
through the entire initial NTP configuration; setup the /etc/ntp.conf
file
to point to the server, etc.
Now when I run the ntpdate -d <address of server> on the linux box I
get all
the right information.
Also, when I run the same command with the address for another
non-linux box
(AIX): ntpdate -d <address of non-linux box> I get all the right
information
again.
The problem is that the linux box does not answer queries of the
command to
it.
So if I enter the following on the non-linux box:
Ntpdate -d <address of linux box>... all the values for offset, etc.
are all
zeroed out. So the linux box is not passing any information back to
the
querying processor, even though the command works the other way
(executed on
the linux box querying the non-linux box). Also, I don't see the
usual
"transmit....recieve" pattern for the command.... just the
"transmit...transmit...".
Are there any reasons that the box can query the server and other
boxes
successfully, but not answer queries sent to it?
And in an effort to troubleshoot, I have commented out everything in
the
/etc/ntp.conf file except the server address to see if there was
something
in that file causing the problems, but that didn't work either.
Do you have any information on this that could help me? Anything at
all
would be appreciated.
Hi Gaurav,
Have you ensured that the firewall (iptables) are deactivated or got the ntp port open for ntp queries from the AIX boxes?
- Nicolas
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
-
Nicolas Sahlqvist