Network Time Protocol | NTP Port | gps ntp
Public NTP | Google Developers The Network Time Protocol (NTP) is used by hundreds of millions of computers and devices to synchronize their clocks over the Internet. If your computer sets its own clock, it likely uses NTP. If your computer sets its own clock, it likely uses NTP. Internet Time Service Firewall information | NIST tcp port 13, which is used by the NIST client software by default and by other programs that use the "daytime" protocol. tcp port 37 and udp port 37, which are used by DATE, RDATE, SDATE and by other programs that use the "time" protocol. Network Time Protocol (NTP) Issues Troubleshooting and NTP uses User Datagram Protocol (UDP) port 123. Create ACL 101: access-list 101 permit udp any any eq 123 access-list 101 permit udp any eq 123 any NTP packets usually have a source and destination port of 123, so this helps: permit udp any eq 123 any eq 123 ; Use this ACL in order to limit output from the debug ip packet command:
Troubleshoot Network Time Protocol (NTP) - Cisco
NTP 13(B), FLAGS, PENNANTS AND CUSTOMS, was developed under the direction of the Commander, Naval Telecommunications Command, and is promulgated for use by the U.S. Navy and Coast Guard. Network Time Protocol, NTPv3, NTPv4, Time Servers NTP uses UDP for transport and port 123 for both source and destination. Clock Synchronisation Algorithm. The clock synchronisation algorithm is used by the NTP client when synchronising its clock with an NTP server. The client needs the Round Trip Delay Time and the Offset. NTP port needed to open on firewall Solutions | Experts
pool.ntp.org: How do I setup NTP to use the pool?
Port(s) Protocol Service Details Source; 123 : udp: NTP: Network Time Protocol (NTP) - used for time synchronization Security Concerns: It provides both information and possible avenue of attack for intruders. Info gathered can include system uptime, time since reset, time server pkt, I/O & memory statistics and ntp peer list. Network Time Protocol | NTP Port | gps ntp