[SOLVED] Can't get NTP to work on HP Printers with

TCP/UDP Ports -> Port 123 Port 49000 - 50000. Port 123. Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time. Official. Port. Protocol (TCP/UDP) Title. UDP 123 - Port Protocol Information and Warning! Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) but unlike TCP on Port 123, UDP Port 123 is connectionless and does not guarantee reliable communication; it’s up to the application that received the message on Port 123 to process any errors and verify correct delivery. List of TCP and UDP port numbers - Wikipedia 248 rows

Dec 18, 2016

Jul 20, 2020 Open TCP/UDP Port 123 - Linksys Community

UDP 123 - Port Protocol Information and Warning!

How to allow timesync over UDP port 123 (SNTP) and TCP Sep 14, 2009 How to check UDP port status open or not. - Open Port Oct 10, 2018