I configured autoshutdown 5.0.2 to check only one IP address, 192.168.2.4, by putting just this single address into the GUI "IP range" field. However, the script always checks the full range 192.168.2.2 ... 192.168.2.254; this is also the list in /tmp/autoshutdown/pinglist. If I delete that file, it is recreated. The /etc/autoshutdown.conf entry reads RANGE="192.168.2.4" which looks good for me.
A bug in creating the pinglist ? I tried to check /sbin/autoshutdown.sh on my own but unfortunately I am not a bash enthusiast... that syntax is beyond my skills , sorry.