Hi;

i want to run (netstat -an | grep ":80 "| awk '{print $5}'|cut -d":" -f1 | sort |uniq -c | sort -nr | head -20 | grep -v -E "127.0.0.1|0.0.0.0") <-- this command every 30 second and if result is higher than 30 automaticly drop that ip adres.

[root@xxx ]# netstat -an | grep ":80 "| awk '{print $5}'|cut -d":" -f1 | sort |uniq -c | sort -nr | head -20 | grep -v -E "127.0.0.1|0.0.0.0"
141 xx.yy.152.87
72 yy.xx.146.110
67 xx.yy.136.9
46 yy.xx.41.60
42 yy.xx.223.140
32 xx.xx.140.90
21 yy.xx.45.169
7 xx.xx.245.75

result > 20 : which ips

141 xx.yy.152.87
72 yy.xx.146.110
67 xx.yy.136.9
46 yy.xx.41.60
42 yy.xx.223.140
32 xx.xx.140.90
21 yy.xx.45.169

i want to ban (drop) that ip adresses with automaticly every 30 second
How can i do this ?