Nothing more.
Server address
ntp.habibur.com
You can use this server in your devices like routers or DVRs to sync time. And it's working. Running from another machine.
[habib@msi nbis]$ sudo ntpdate -u ntp.habibur.com
{"time":"2021-05-14T01:40:57.451933+0600","offset":0.035927,"precision":0.029076,"host":"ntp.habibur.com","ip":"143.198.203.171","stratum":3,"leap":"no-leap","adjusted":false}
[habib@msi nbis]$