UDP DDoS Null Route script

#!/bin/bash
#
# Create databuckets
Phase1=/tmp/DDOS.log; touch $Phase1
Phase2=/root/DDOS_IP.log; touch $Phase2

# Extract IP addresses
cat /var/log/syslog | grep "UDP: bad checksum" | sed 's/:/ /g' | awk {'print $13'} >> $Phase1

cat $Phase1 | sort --unique >> $Phase2

# Null route
for i in $( cat $Phase2 ); do
ip route add $i via 127.0.0.1; done