Dec 18, 2016

May 08, 2019 Opening UDP port 123 - Cisco Community Re: Opening UDP port 123 Thanks for the info. At this point, I don't think it's a problem with the firewall blocking any ports, as this hasn't been a problem in the past and at … ntp-info NSE Script - Nmap nmap -sU -p 123 --script ntp-info Script Output PORT STATE SERVICE VERSION 123/udp open ntp NTP v4.2.4p4@1.1520-o | ntp-info: | receive time stamp: Sat Dec 12 16:22:41 2009 | version: ntpd 4.2.4p4@1.1520-o Wed May 13 21:06:31 UTC 2009 (1) | processor: x86_64 | system: Linux/2.6.24-24-server | stratum: 2 |_ refid:

Oct 21, 2019 · UDP messages are generally broadcast over a network to anyone who is listening on the specified UDP port. This makes it perfect for housekeeping type messages that relate to running the network itself. It’s also perfect for voice-over-IP streaming, online video games and streaming broadcasts.

Solved: Hi , To test if any port is active or opened by firewall or not, we can use telnet if port is tcp. How to check if the port to be verified is udp one.will telnet work? Thanks! networking - How to check if port 123 is ready for time UDP port 123 (ntp service): LISTENING or FILTERED. UDP port 123 (ntp service): LISTENING or FILTERED. I am not sure if the port is available for time sync or not. But our team has confirmed that no firewall should be blocking that. It is not showing "LISTENING" because it is a UDP port?

NTP Server Test

248 rows UDP 123 - Port Protocol Information and Warning! UDP Port 123 may use a defined protocol to communicate depending on the application. A protocol is a set of formalized rules that explains how data is communicated over a network. Think of it as the language spoken between computers to help them communicate more efficiently.