I do have question if I may....I have a NTP server configured on my LAN that is synced by GPS...so I configured the router to get it's time from the server(192.168.0.1) but I keep getting the message: %NTP-4-PEERUNREACH: Peer 192.168.0.1 is unreachable.
Here is my config file:ATTACHED
I have looked at the config that you posted and I do not see any particular errors that would impact NTP.
I will disagree somewhat with my colleague Hieu and observe that I believe that the original access list entry is ok. His entry is ok as well. This is because NTP is one of the few protocols in which the source port and the destination port are exactly the same value.
I wonder about your statement in the original post in which you mention that the NTP server is synced by GPS. This leads me to assume that the NTP server is not a Cisco device (since I am not aware of any of them that sync to GPS) and I wonder what kind of device and what OS it is. I wonder if it is a Windows server? If it is a Windows server is it running the native MS time service or is it running some other software for NTP?
Be aware that by default Windows servers maintain time by a different protocol than NTP and do not serve as NTP servers for network devices.
Perhaps you can clarify what kind of machine this is and what time software that it is running?