Kiss of Death packet is sent by the server when multiple
NTP client packets are received with less spacing than two seconds in between. This is the case when “
kod” parameter is in the configuration of the
NTP server. At the time of standardizing that rule the (probably just implicit) assumption was that there is only one single
NTP client behind one client IP address. I believe that this assumption is less and less true due to the widespread use of
NAT. Client packets may interleave from multiple, different NTP clients behind the same NATed IP address, without respect of the required two seconds spacing in between.
I do not put the
kod option in the configuration of the
NTP servers I am managing. What is your take on that?