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 at lmco.com> wrote: > This worked like a charm. Thanks for all the help! > > > -----Original Message----- > From: Nicolas Sahlqvist [mailto:nicco77 at 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 at 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 at centos.org [mailto:centos-bounces at 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 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 > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > >