On Nov 20, 2007 2:05 PM, Engineer, Gaurav <gaurav.engineer at 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