过滤web异常访问ip并封禁脚本

#!/bin/bash
logfile=/data/nginx/log/access.log
d1=`date -d "-1 minute" +%H%M`
d2=`date +%M`
ipt=/sbin/iptables
ips=/data/tmp/ips.txt
ban()
{
 grep '$d1:' $logfile|awk '{print $1}'|sort -n|uniq -c|sort -n > $ips
 for i in `awk '$1>100 {print $2}' $ips`
 do
 $ipt -I INPUT -p tcp --dport 80 -s $i -j REJECT
 echo "`date +%F-%T` $i" >> /tmp/badip.log
 done
}
unban()
{
 for a in `$ipt -nvL INPUT --line-numbers |grep '0.0.0.0/0'|awk '$2<10 {print $1}'|sort -nr`
 do 
 $ipt -D INPUT $a
 done
 $ipt -Z
}
if [ $d2 -eq "00" ] || [ $d2 -eq "30" ];
 then unban ban else
 ban
fi