The following uses the ubntmod.sh script to check a device then report if it is resolving DNS or not. ip=”192.168.1.” specifies the first part of the ip, the “for ((i=1; i<=254;i++))” tells it to go from 192.168.1.1 – 192.168.1.254, change the beginning and ending number if you want to change the ip range.

ip="192.168.1." && for ((i=10; i<=30;i++)); do if ( fping ${ip}$i -r1 | grep alive); then ./ubntmod.sh -i ${ip}${i} -e ; else echo ${ip}$i not alive; fi ; done 

Broken out for easier reading.

ip="192.168.1." 
for ((i=10; i<=30;i++))
do 
if ( fping ${ip}$i -r1 | grep alive); then 
./ubntmod.sh -i ${ip}${i} -e 
else echo ${ip}$i not alive
fi 
done 

If the script is able to log into the device and resolve DNS you should get

192.168.1.1 Resolves DNS