# cat syslogemu.log | grep "DROP INVALID:" | awk '{print $10}' | cut -d= -f2 | sort | uniq -c | sort -n
...
     41 178.150.98.36
     45 66.249.71.173
     52 87.250.255.243
     93 95.108.158.233
root@:/var/log/ulog#