UNIX for Dummies Questions & Answers

How to provide a client exclusive access to the NTP device or NTP server.

Example:
1. Configured md5 authentication for a subnet added below restriction line to the subnet as below in ntp.conf file. Also configured the keys and md5 authentication working .

Code:

restrict 192.168.1.0 mask 255.255.255.0 nomodify noquery nopeer notrust

Question 1: Now how to provide just plain exclusive (non md5 authentication) to some of the IPs from the subnet.

Code:

192.168.1.10
192.168.1.20

Question 2: Any order to follow in ntp.conf file. Which will be precedence over the other.

Can you please let me know.

Appreciate your help.

It's simply

Code:

restrict 192.168.1.10
restrict 192.168.1.20

If no restriction follows then everything is allowed.
I have only seen the host restrictions after the net restrictions, but I think the order does not matter.
In most LUnix OS the following command shows if/how it works

Code:

ntpq -p

But you need to allow localhost in ntp.conf

Code:

restrict 127.0.0.1