If I need my 7206 to get timing from these configured servers, what should the access-group statement be set to (peer, serve, serve-only, or query-only)?
ntp server 18.104.22.168
ntp server 22.214.171.124
ntp server 126.96.36.199
ntp server 188.8.131.52
ntp server 184.108.40.206
ntp server 220.127.116.11
ntp server 18.104.22.168
ntp server 22.214.171.124
ntp server 126.96.36.199
When I try these 4 possible configurations only "peer" works. With this statement in place it syncs up to the other time servers but allows any client to grab timing from it as well. It seems to me I would want "query-only" for the servers I'm grabbing timing from and "serve-only" for the clients I want to allow to get timing from me. It doesn't work that way.
How can I make sure my router hasn't given any privileges to servers I'm connected to our my clients?
Configuring an NTP Access Group
The access list-based restriction scheme allows you to grant or deny certain access privileges to an entire network, a subnet within a network, or a host within a subnet. To define an NTP access group, use the following command in global configuration mode:
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