![]() ![]() 2- Did you try to disable your NTP Server’s firewall or open port for NTP (UDP port 123) Firewall where ntp server is running is 'down' / not running Yes my Workstation as other servers are getting sync from ntp. The Invert match box should remain checked. 1- Do you have route to your internal NTP Server -> Yes i get answer and 0 packetloss. This could be adapted to allow access to only a specific set of NTP servers by changing the Destination network from “LAN Address” to an alias containing the allowed NTP servers. Access to other NTP servers on port 123 is impossible. Now any NTP request made by internal clients to any external IP address will result in the query being answered by the firewall itself. Click the Windows Start button and enter cmd (no quotes) into the Windows search text box. If NTP requests to other NTP servers are blocked, such as in the Blocking NTP queries to external servers entirely, ensure the rule to pass NTP to 127.0.0.1 is above any rule that blocks NTP. How to Test an NTP Port Right-click your system clock located in the Windows task bar. Step 6: Configure Firewall so that client (s) can access NTP server Finally, it is time to configure your system’s UFW firewall that incoming connections can access the NTP server at UDP Port number 123. Redirect Target IP: Your Firewall's IP address - usually the same as your Computer's gateway sudo service ntp status The Active status verifies that your NTP server is up and running. Navigate to Firewall > NAT, Port Forward tabįill in the following fields on the port forward rule:ĭestination: Invert Match checked, LAN Address
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