Finally, we are going to open the UDP Port 123 as it is used for the Network Time Protocol (NTP). To do so, you can follow the steps mentioned below. This will open the UDP Port 123 which will ...

For details about port numbers, see TCP/IP port ... NNTP 119 Usenet newsgroups NNTPS 563 Usenet (secure) IRC 194 Chat NTP 123 Network time of day SNMP 161,162 Network management CMIP 163,164 ...