[root@cnsz92vl09055 ~]# nmap -sU -p123 100.70.XX.XX
Starting Nmap 6.40 ( http://nmap.org ) at 2020-10-10 11:03 CST
Nmap scan report for 100.70.XX.XX
Host is up (0.00046s latency).
PORT STATE SERVICE
123/udp open|filtered ntp --->表示有问题
[root@cnsz92vl09055 ~]# nmap -sU -p123 100.65.XX.XX
Starting Nmap 6.40 ( http://nmap.org ) at 2020-10-10 11:03 CST
Nmap scan report for 100.65.XX.XX
Host is up (0.00034s latency).
PORT STATE SERVICE
123/udp open ntp -->正常
ntpstat 100.65.XX.XX
unsynchronised --->未正常同步
time server re-starting
polling server every 8 s
[root@cnsz92pl00318 data]# ntpstat 100.65.XX.XX
synchronised to NTP server (100.65.XX.XX) at stratum 5 --->正常同步
time correct to within 10 ms
polling server every 64 s
[root@cnsz92pl00318 data]#
ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
+100.65.XX.XX 100.67.XX.XX 4 u 9 64 377 0.157 2.213 0.111 --->正常输出
*100.65.XX.XX 100.67.XX.XX 4 u 8 64 377 0.132 2.154 0.135
service ntpd restart