There clearly is an issue with your network, either a local firewall, or some firewall in your router, or at your internet service providers. (some providers block NTP because with a wrong configuration it can be used as DDoS amplifier)
Rob On 10/19/22 20:05, Mahmood Naderan wrote: > Have no effect, please see below: > > $ chronyc sources > 210 Number of sources = 22 > MS Name/IP address Stratum Poll Reach LastRx Last sample > =============================================================================== > ^? prod-ntp-5.ntp4.ps5.cano> 0 10 0 - +0ns[ +0ns] +/- > 0ns > ^? prod-ntp-4.ntp1.ps5.cano> 0 10 0 - +0ns[ +0ns] +/- > 0ns ...