防止服务器被外网的IP地址ssh连接或扫描试探
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![]() | 问题:给朋友的一个安全类脚本,为了防止被其他IP通过ssh手段连接服务器或受到的骚扰。 以下是在CentOS release 6.3 x64系统一个外网论坛上测试的结果。 # cat hosts_deny.sh ----------------------------------------------------------------------- #!/bin/bash #Host.deny Shell Script #2013-08-24 cat/var/log/secure| awk'/Failed/{print $(NF-3)}'| sort| uniq-c | awk'{print $2 "=" $1;}'> /tmp/black_ip.txt DEFINE=10 fori in`cat/tmp/black_ip.txt` do IP=`echo$i | awk-F= '{print $1}'` NUM=`echo$i | awk-F= '{print $2}'` if[ $NUM -gt $DEFINE ] then grep$IP /etc/hosts.deny > /dev/null if[ $? -gt 0 ] then echo"sshd:$IP">> /etc/hosts.deny fi fidone -----------------------------------------------------------------------# crontab -l */1* * * * sh /shell_script/hosts_deny.sh -----------------------------------------------------------------------# grep sshd /etc/hosts.deny sshd:116.10.202.163 sshd:116.10.202.169 sshd:118.26.203.66 sshd:119.80.39.55 sshd:202.203.194.45 sshd:219.148.36.20 sshd:60.190.219.98 sshd:61.155.177.58 sshd:67.205.111.20 sshd:70.34.202.31 sshd:77.65.0.86 | |
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