I wanted to configure a user's home router to synchronize its time with a Network Time Protocol (NTP) server, so that its log entries would have accurate time stamps. Since the user had a Comcast-provided connection to the Internet, I decided to use a Comcast NTP server. The one that I used is ntp01.inflow.pa.bo.comcast.net [68.87.96.5].
If you want to verify that a NTP server is available and responding to NTP queries, you can go to Query NTP server and enter the Fully Qualified Domain Name (FQDN) or IP address of the system to be queried to submit an NTP query to the system from that site. If the queried system is responding to NTP requests, you will see something similar to the following:
Output of NTP server at 68.87.96.5
ntpdate
30 Nov 16:12:42 ntpdate[23942]: ntpdate 4.1.1@1.786 Tue Sep 23 17:37:40 UTC 2003 (1) server 68.87.96.5, stratum 2, offset 0.001361, delay 0.10997 30 Nov 16:12:42 ntpdate[23942]: adjust time server 68.87.96.5 offset 0.001361 sec
If you see "stratum 0" displayed on the results page, the system is not responding to NTP queries. The offset and delay values will be zero as well in that case.
You can find a list of publicly accessible NTP servers at NTP.Servers Web .
