This is an encrypted syslog amplifier for data diodes. It is used to send logs in a network with a higher security level.
For Syslog via data diode you need to enable UDP server in /etc/rsyslog.conf or inside the included config file /etc/rsyslog.d/remote.conf:
module(load="imudp") input(type="imudp" port="514" Address="127.0.0.1")
on the destination server. This is the syslog input for the concentrator where datadiode-syslog-deamplifier will send data to.
Client syslog daemons should send data into the datadiode-syslog-amplifier:
. @datadiode-amplifier-host-ip:1514
Similar settings for BSD syslog and syslog-ng if they are the choice over rsyslog.