Symmetricom Time Server User Manual page 84

Chapter 4: Serial or Telnet I/O Functions
2. Edit the data in the "ntp.conf" file by adding or renaming servers from this list.
3. Edit the data in the "ntp.keys" file (see below).
4. Return the revised data to the unit by sending a "set" command:
The unit responds:
If you answer "y", the unit responds as follows, then resets:
As a safety feature, after sending this command, you have 10 seconds to respond
affirmatively (enter the letter "y") to the confirmation prompt, after which the unit
executes the command and resets. Within that 10 second time period, any other response,
including no response, results in the unit canceling the command.
When sending a "set" command, the last number in the unit response ("70" in this example)
represents file length. Depending on the parameters you configure, this number may vary.
Editing the MD5 keys on the NTP Server
NTP keys are needed if you are using NTP in broadcast mode with MD5 authentication.
This (and the following) section provide configuration guidelines. For a discussion of
using NTP in broadcast mode without MD5 authentication, see Appendix B.
The Broadcast mode adjusts its periodicity according to feedback from its broadcast
client. The periodicity will typically settle-out to about every 2 minutes. This activity is
not adjustable.
MD5 private keys have to be edited on both the NTP server and the NTP client. The
private keys are defined in the "ntp.keys" file.
4-70
The line below lists the currently trusted keys. See the NTP keys
file for the actual keys and their corresponding key numbers.
Keys 1 and 2 are listed as an example.
appear in the NTP keys file.
remember to change the keys on a regular basis.
trusted keys can be defined on this line.
trustedkey 1
F100 config set ntp host:192.168.1.14
dir:temp
Are you sure? (y/N)
Source file temp/ntp.conf bytes read: 70
Dest File/etc/ntp.conf bytes written:
Source file temp/ntp.keys bytes read: 70
Dest File/etc/ntp.keys bytes written:
Configuration files transferred successfully!
Note= to ensure maximum security,
2
TimeVault™ User's Manual
Extended Function Commands
All keys listed must
A maximum of 20
70
70
6000-100Ch4.fm Rev. D