shell脚本把一些请求量非常高的ip给拒绝掉

#!/bin/bash
block_ip()
{
t1=`date -d "-1 min" +%Y:%H:%M`
log=/data/logs/access_log
 
egrep "$t1:[0-9]+" $log > /tmp/tmp_last_min.log
awk ‘{print $1}‘ /tmp/tmp_last_min.log |sort -n |uniq -c|sort -n |awk ‘$1>100 {print $2}‘ > /tmp/bad_ip.list
n=`wc -l /tmp/bad_ip.list|awk ‘{print $1}‘`
if [ $n -ne 0 ]
then
    for ip in `cat /tmp/bad_ip.list`
    do
    iptables -I INPUT -s $ip -j REJECT
    done
fi
}
 
unblock_ip()
{
    iptables -nvL INPUT|sed ‘1d‘ |awk ‘$1<5 {print $8}‘ > /tmp/good_ip.list
    n=`wc -l /tmp/good_ip.list|awk ‘{print $1}‘`
    if [ $n -ne 0 ]
    then
    for ip in `cat /tmp/good_ip.list`
    do
    iptables -D INPUT -s $ip -j REJECT
    done
    fi
    iptables -Z
}
 
t=`date +%M`
if [ $t == "00" ] || [ $t == "30" ]
then
   unblock_ip
   block_ip
else
   block_ip
fi