computing, subsequent standards for NTP authentication remain in flux and these are the most common
requirements. They maintain the compatibility required of most NTP clients requiring authentication.
A standard ntp.keys file can be uploaded through this page. Simply choose the file to upload from your
local computer and allow the upload to complete. This is a one way transaction, there is no way to pull
the ntp.keys file from the TM2000B back to the local browser.
The allowed formats for the key file are as follows (this is the default key file in the device):
#
#ntp.keys file
#
#Two types of keys supported, MD5 and SHA1
#Line Format: Key # <space> Key Type <space> Key
#Key# is a positive integer number greater than 0
#Key Type is either (M)D5 or SHA(1)
#Key: For MD5 is a character string 1-32 character ASCII String, or for SHA a 40
character hex string
1 M tmachine
3 SHA1 D5C9F80F7B1220D9710049AE41FB5BB5B18D148E
A matching copy of the ntp.keys file will need to be entered on the client device, or remote server if the
Peer Time Server mode is being used.
If setting up a NTPD implementation, the ntp.conf file on the server will need to include directives to
load the key file and authorize them. There are many tutorials on the Internet that discuss setting up
authentication on the NTPD implementation. The minimum extra commands that get added to the
ntp.conf file are:
keys
,
trustedkey
, and the updates to the individual server lines. Other clients
supporting authentication will have other instructions to follow.
3.7.9 Set TM2000B time manually
This set of fields allows the TM2000B to have its time set manually from the web page. Entering the
UTC time of day, 24 hour mode, and clicking the Set Time button below the fields will set the time of
the TM2000B accordingly and enable the NTP server software to responds to requests from clients.
Holdover settings have no effect when the time has been set manually. If at any point GPS or Peer
NTP settings start getting time, then the manual mode will be ended.
Installation and Operations Manual | Page 14
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