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