How the Windows Time Service Works | Microsoft Docs

22.14. Configure the Firewall to Allow Incoming NTP To enable NTP to pass through the firewall, using the graphical tool system-config-firewall, issue the following command as root: ~]# system-config-firewall The Firewall Configuration window opens. Select Other Ports from the list on the left. Click Add.The Port and Protocol window opens. Click on one of the port numbers and start typing 123.Select the “ port 123 ” entry with udp as the How to Configure NTP Server on Windows Server 2019 Jan 09, 2020 NIST Internet Time Service

How to Use Nmap to Scan for Open Ports {Updated 2020}

This is because all NTP servers need access to User Datagram Protocol (UDP) port 123, and as long as the Windows Time service is running on the Windows Server 2003 operating system, port 123 remains reserved by Windows Time. List of TCP and UDP port numbers - Wikipedia 248 rows How to configure NTP and DST - Hikvision

Solved: NTP port opening! - The Meraki Community

Tap the NTP tab to enter the NTP Settings interface. Check the Enable NTP checkbox to enable this feature. Configure the following NTP settings: Interval(min): Time interval between the two synchronizing actions with the NTP server. The unit is minute. NTP Server: IP address of the NTP server. NTP Port: Port of NTP server. ISC ntpd (the ntp package) will open UDP 123 on all your interfaces regardless of what you do with it. Firewall or port filter is blocking NTP packages. Make sure that firewall settings in Windows enable UDP protocol in both ways (inbound/outbound) on port 123. Read more Some w32time versions coming with Windows XP or Windows Server 2003 may be unable to query the time from NTP servers. A workaround for the recognized problem is to change I switched to a machine with an RS232 port and also found version 4.2.5. NTP now opens port COM1 with no problem. However, status shows that it doesn't seem to be reading from GPS since all values (jitter, offset etc) are 0. Any suggestions? Jack This site uses cookies for analytics, personalized content and ads. By continuing to browse this site, you agree to this use. Learn more