Meinberg LANTIME, Operating Instructions Manual

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NTP keys and certificates
The fourth and fifth section of the “Security“ page allow you to create the needed
crypto keys and certificates for secure NTP operation (please see NTP authentication
below).
The function “Generate new NTP public key“ is creating a new self-signed certificate
for the timeserver, which is automatically marked as “trusted“.
Important note: This certificate is depending on the hostname of your LANTIME, it
is mandatory to re-create the certificate after changing the hostname. The certificates
are build with the internal command “ntp-keygen -T” (ntp-keygen is part of the in-
stalled NTP suite). Your LANTIME is using the /etc/ntp/ directory for storing its
private and public keys (this is called the “keysdir”). Please refer to the chapter “NTP
Autokey” for further information (below).
The two options “Show NTP MD5 key“ and “Edit NTP MD5 keys“ allow you to
manage the symmetric keys used by NTP. More about that can be found in the
chapter about symmetric keys (below).
SNMP Parameter
In the last Section all parameters for SNMP can be configured. More information
you can find later in this manual.
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