Xinetd

IP6M uses Xinetd for some services needed by DOCSIS specification. The installer enables the following services:

• UDP Time Server
• Atftpd daemon

After installing xinetd  package:

apt install xinetd

time server can be enabled in the 

/etc/xinetd.d/time

file at the UDP section:

# This is the udp version.
service time
{
    disable      = no
    type         = INTERNAL
    id           = time-dgram
    socket_type  = dgram
    protocol     = udp
    user         = root
    wait         = yes
}

setting the "disable" variable to "no" and restarting the xinetd service:

$ sudo service xinetd restart

Service can be tested with the "rdate" command:

$ sudo apt install rdate

$ sudo rdate -u localhost
Tue Oct  8 20:42:34 CEST 2019

Rdate has to return current server time.