Ping & traceroute
If you suspect a network problem between the monitoring system and your server, it’s helpful to have a traceroute from your NTP server to the monitoring system. You can traceroute to the monitoring network using 184.108.40.206 and 2604:1380:2:6000::15.
You can ping or traceroute from the monitoring network using HTTP, with:
curl http://trace.ntppool.org/traceroute/220.127.116.11 curl http://trace.ntppool.org/ping/18.104.22.168