Port 123NTP
Network Time Protocol
About Port 123
NTP synchronizes clocks between computer systems over packet-switched networks. Accurate time synchronization is critical for logging, authentication, and distributed systems.
Security NotesNTP servers can be exploited for amplification DDoS attacks. Restrict NTP service to known clients and disable the monlist command.
Total Hosts
68.6K
TLS Encrypted
12.6%
Vulnerable Hosts
1.9K
Countries
10+
Top Services
| http | 58,921 |
| https | 3,962 |
| http-proxy | 1,305 |
| ssh | 837 |
| telnet | 666 |
| ssl/http | 535 |
| mysql | 339 |
| mongodb | 189 |
| ftp | 172 |
| rtsp | 164 |
Top Countries
| 35,396 | |
| 4,615 | |
| 3,024 | |
| 2,146 | |
| 1,676 | |
| 1,527 | |
| 1,399 | |
| 1,075 | |
| 950 | |
| 912 |
Top Products
| Tengine | 5,257 |
| gws | 3,137 |
| OpenSSH | 778 |
| Apache HTTP Server | 720 |
| nginx | 626 |
| Nginx | 492 |
| IIS | 442 |
| Microsoft ASP.NET | 437 |
| Plex Media Server httpd | 340 |
| MySQL | 314 |