NwLogPlayer is a utility that simulates syslog traffic. In the hosted environment, NwLogPlayer.exe is a command line utility located on the RSA Security Analytics Client machine in the following directory:
C:\Program Files\NetWitness\NetWitness 9.8
NwLogPlayer is also located on the Log Decoder host in /usr/bin.
At the command line, type nwlogplayer.exe -h to list the available options, as reproduced here: