similar to: chronyd configuration as a local ntp server

AFAIK the only thing needed to make your host an NTP server using chrony is to set the allow line to the network address in CIDR format of the network you want to be served, and uncomment it. The restart chronyd. You also need to ensure that port 123 (NTP) is open to your internal network on your filrewall. I have a CentOS 6 box that is an NTP server for my network. CentOS 7 works the same

'Modern' NTP allows for all sorts of updates to NTP servers, with all sorts of attacks. So to prevent even local hosts from making changes to your NTP server, there is the restrict instead of allow command. Its intent is to limit what the server will accept from a host in the address range instead of allowing any command from within that range. I use this on my Centos6 servers. I

On Mon, Dec 26, 2016 at 11:04:22PM -0500, Robert Moskowitz wrote: > This is for centos 7 that has chronyd 2.1.1 > > I am looking into how to use chronyd as my local ntp server. > > On my old servers with ntpd I had local access control lines like: > > restrict 192.168.128.0 mask 255.255.255.0 nomodify notrap > > > But in looking for documentation on chronyd I did

On 5/24/2015 12:22 PM, Gordon Messmer wrote: > On 05/24/2015 11:41 AM, Kirk Bocek wrote: >> to activate your selected daemon. I just used the new systemd commands, >> thinking that would be enough. So I tried that and rebooted. Nope, same >> problem: > > chronyd and ntpd both use UDP port 123, so each will terminate the > other when it starts. If both are enabled,

Robert, If your NTP server will be on 7/24, I would uninstall chrony and install ntpd which is still included in CentOS 7. Configure as usual. For the differences between chrony and ntpd reference: http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-between-ntpd-and-chronyd/ Essentially, chrony is more for laptops with intermittant network connections, and ntpd is better suited to

Hi, As Centos 7 and Fedora defaults to chronyd [2] , should I use ntpd for some reason [3] ? I based my configurations on [1] which use ntpd ... but I thinking change for chronyd , change ntp deamons could outage the samba service and client computers ? Thanks [1] https://negativo17.org/samba-4-active-directory-with-bind-dlz-zones-dynamic-dns-updates-windows-static-rpc-2/ [2]

> > > Forgot to mention, are sure your time sync over AD is working correctly. > One to add to you list, check times of server and clients, (* yes again, > if needed just to be sure). > Yes, I have double check that time is correctly being synced. FYI, Rowland, the process outlined in the wiki for using chronyd does not work on Ubuntu 18.04 (my AD DC is on Ubuntu, but my file

Hallo, what is the standard way to sync time under Centos 7. ntp or chrony. Thanks for a short hint. Ralf

I have read: http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-between-ntpd-and-chronyd/ My server is up all the time and will serve time to internal systems (via DHCP options). Caveat is that my server is an armv7 (Cubieboard2) which does not have an RTC (no battery). So whenever the system boots, the time is ZERO (Dec 31, 1969 or some such). Chrony fixes this really fast;

Hi, the instructions for "Time Synchronisation - SELinux Labeling and Policy" on https://wiki.samba.org/index.php/Time_Synchronisation_-_SELinux_Labeling_and_Policy don't seem to work on CentOS 8. Using chrony I tried to adapt them (with very limited SELinux knowledge) like this: chcon -u system_u -t chronyd_exec_t /var/lib/samba/ntp_signd semanage fcontext -a -t chronyd_exec_t

On Thu, 2019-10-24 at 16:27 +0100, Rowland penny via samba wrote: > On 24/10/2019 16:10, S?rgio Basto via samba wrote: > > Hi, > > As Centos 7 and Fedora defaults to chronyd [2] , should I use ntpd > > for > > some reason [3] ? I based my configurations on [1] which use ntpd > > ... > > but I thinking change for chronyd , change ntp deamons could outage >

On 05/02/17 16:15, Richard wrote: > >> Date: Sunday, February 05, 2017 10:26:05 -0500 >> From: Robert Moskowitz <rgm at htt-consult.com> >> >> I have read: >> http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-bet >> ween-ntpd-and-chronyd/ >> >> My server is up all the time and will serve time to internal >> systems (via

On Sunday, 3 June 2018 16:32:12 CEST Rowland Penny via samba wrote: > On Sun, 3 Jun 2018 17:11:47 +0300 > > Alexei Rozenvaser <alexei.roz at gmail.com> wrote: > > On Sun, Jun 3, 2018 at 4:51 PM Rowland Penny via samba > > > > <samba at lists.samba.org> wrote: > > > On Sun, 3 Jun 2018 16:29:04 +0300 > > > > > > Alexei Rozenvaser

> Date: Sunday, February 05, 2017 10:26:05 -0500 > From: Robert Moskowitz <rgm at htt-consult.com> > > I have read: > http://thegeekdiary.com/centos-rhel-7-chrony-vs-ntp-differences-bet > ween-ntpd-and-chronyd/ > > My server is up all the time and will serve time to internal > systems (via DHCP options). > > Caveat is that my server is an armv7

Hi All, Just noticed a funny time jump on a testing CentOS 7 VM. Specifically the system time jumps around by a few hours during system boot. The below is a selection from /var/log/messages during boot: Jan 19 12:49:57 arr-data-dev chronyd[716]: Frequency -0.829 +/- 0.007 ppm read from /var/lib/chrony/drift Jan 19 12:49:57 arr-data-dev polkitd[720]: Started polkitd version 0.112 Jan 19

My Centos7 system does not have a battery for the clock (like most armv7 SOCs), thus I rely on that at some point in boot time, chronyd sets the time. If a file is updated prior to chronyd accomplishing its task (or network connectivity is down), the file ends up with a timestamp of "Dec 31 1969". I notice that occasionally, after a reboot, /etc/aliases.db reverts to this time,

On Sat Feb 10 15:31:47 2024 Mark Foley <mfoley at novatec-inc.com> wrote: > > On Sat, Feb 10, 2024 at 2:20?PM Mark Foley via samba > <samba at lists.samba.org> wrote: > > Does chrony have to be built in some special way to enable ntp-signd? > > Needs to be configured with "--enable-ntp-signd". I may have to build from sources. I downloaded from the

On Tue, May 28, 2019 at 11:44:35AM +1000, Jobst Schmalenbach wrote: > On Mon, May 27, 2019 at 06:32:19AM +0200, Ralf Prengel (ralf.prengel at rprengel.de) wrote: > > > > Hallo, > > > > what is the standard way to sync time under Centos 7. > > ntp or chrony. > > YMMV. > > I have used NTP for many, many years so I am familiar with it and also have ALL

After our office upgraded to Windows 10, time sync stopped working with the Windows workstations. This used to work fine with Windows 7 and still works with linux domain members (although that's not surprising). The Windows 10 workstations ended up operating off the CMOS clock. We didn't notice this for a long time since the CMOS clock drift is slow, but after several months users started

On 5/23/2015 11:22 PM, Luigi Rosa wrote: > Kirk Bocek wrote on 24/05/2015 04:37: >> So I've built my first CentOS 7 host and am learning all the new ways >> of doing >> things. I setup and enabled ntpd but after a reboot I get: > > In CentOS 7 is bettere to use chrony, here's an howto > > http://linoxide.com/linux-command/chrony-time-sync/ > So