IP validation

if you have a list of ip to validate ,
you can use this little bash script ,
this will open your IP list ,
then test if all the 4 numbers that make a standard IP.are beeten 0 and 255

if the ip is valid then the script will return valid , else it will return : not valid

for IP_ADDRESS in `cat ip-list.txt` ; do
#this var is a test that will see if the number is beetween 1 and 254
test='([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])'
if [[ $IP_ADDRESS =~ ^$test\.$test\.$test\.$test$ ]]; then
echo "valid:     "$IP_ADDRESS
else
echo "not valid: "$IP_ADDRESS
exit
fi
done

after execution , you will get the following result :

valid:     127.0.0.1
valid:     8.8.8.8
valid:     82.48.250.6
valid:     230.230.230.230
not valid: 255.255.2301
valid:     8.8.4.4
not valid: 80.46.70.22.5
valid:     255.255.255.0
valid:     0.0.0.0

Tag: IP validation

BASH : IP validation