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| #!/bin/bash | |
| IP=$1 | |
| result=`echo $IP | awk -F"\." ' $0 ~ /^([0-9]{1,3}\.){3}[0-9]{1,3}$/ && $1 <=255 && $2 <= 255 && $3 <= 255 && $4 <= 255 '` 2>/dev/null | |
| if [ "$result" = "" ]; then | |
| echo "IPv4 is invalid: $IP" | |
| exit 1 | |
| fi | |
| exit 0 |