1、打开所有的服务云盾
2、通过防火墙策略限制对外扫描行为
请您依据您的server操作系统，下载相应的脚本执行，执行后您的防火墙策略会封禁对外发包的行为，确保您的主机不会再出现恶意发包的情况，为您进行兴许数据备份操作提供足够的时间。
Window2003的批处理文件下载地址：http://oss.aliyuncs.com/aliyunecs/windows2003_drop_port.bat
Window2008的批处理文件下载地址：http://oss.aliyuncs.com/aliyunecs/windows2008_drop_port.bat
Linux系统脚本：http://oss.aliyuncs.com/aliyunecs/linux_drop_port.sh
上述文件下载到机器内部直接运行就可以。
文件内容例如以下：
#!/bin/bash
#########################################
#Function: linux drop port
#Usage: bash linux_drop_port.sh
#Author: Customer Service Department
#Company: Alibaba Cloud Computing
#Version: 2.0
#########################################
check_os_release()
{
while true
do
os_release=$(grep "Red Hat Enterprise Linux Server release"/etc/issue 2>/dev/null)
os_release_2=$(grep "Red Hat Enterprise Linux Server release"/etc/redhat-release 2>/dev/null)
if [ "$os_release" ] && [ "$os_release_2" ]
then
if echo "$os_release"|grep "release 5" >/dev/null2>&1
then
os_release=redhat5
echo "$os_release"
elif echo "$os_release"|grep "release 6">/dev/null 2>&1
then
os_release=redhat6
echo "$os_release"
else
os_release=""
echo "$os_release"
fi
break
fi
os_release=$(grep "Aliyun Linux release" /etc/issue2>/dev/null)
os_release_2=$(grep "Aliyun Linux release" /etc/aliyun-release2>/dev/null)
if [ "$os_release" ] && [ "$os_release_2" ]
then
if echo "$os_release"|grep "release 5" >/dev/null2>&1
then
os_release=aliyun5
echo "$os_release"
elif echo "$os_release"|grep "release 6">/dev/null 2>&1
then
os_release=aliyun6
echo "$os_release"
else
os_release=""
echo "$os_release"
fi
break
fi
os_release=$(grep "CentOS release" /etc/issue 2>/dev/null)
os_release_2=$(grep "CentOS release" /etc/*release2>/dev/null)
if [ "$os_release" ] && [ "$os_release_2" ]
then
if echo "$os_release"|grep "release 5" >/dev/null2>&1
then
os_release=centos5
echo "$os_release"
elif echo "$os_release"|grep "release 6">/dev/null 2>&1
then
os_release=centos6
echo "$os_release"
else
os_release=""
echo "$os_release"
fi
break
fi
os_release=$(grep -i "ubuntu" /etc/issue 2>/dev/null)
os_release_2=$(grep -i "ubuntu" /etc/lsb-release2>/dev/null)
if [ "$os_release" ] && [ "$os_release_2" ]
then
if echo "$os_release"|grep "Ubuntu 10" >/dev/null2>&1
then
os_release=ubuntu10
echo "$os_release"
elif echo "$os_release"|grep "Ubuntu 12.04">/dev/null 2>&1
then
os_release=ubuntu1204
echo "$os_release"
elif echo "$os_release"|grep "Ubuntu 12.10">/dev/null 2>&1
then
os_release=ubuntu1210
echo "$os_release"
else
os_release=""
echo "$os_release"
fi
break
fi
os_release=$(grep -i "debian" /etc/issue 2>/dev/null)
os_release_2=$(grep -i "debian" /proc/version 2>/dev/null)
if [ "$os_release" ] && [ "$os_release_2" ]
then
if echo "$os_release"|grep "Linux 6" >/dev/null2>&1
then
os_release=debian6
echo "$os_release"
else
os_release=""
echo "$os_release"
fi
break
fi
os_release=$(grep "openSUSE" /etc/issue 2>/dev/null)
os_release_2=$(grep "openSUSE" /etc/*release 2>/dev/null)
if [ "$os_release" ] && [ "$os_release_2" ]
then
if echo "$os_release"|grep"13.1" >/dev/null 2>&1
then
os_release=opensuse131
echo "$os_release"
else
os_release=""
echo "$os_release"
fi
break
fi
break
done
}
exit_script()
{
echo -e "\033[1;40;31mInstall $1 error,will exit.\n\033[0m"
rm-f $LOCKfile
exit 1
}
config_iptables()
{
iptables -I OUTPUT 1 -p tcp -m multiport --dport21,22,23,25,53,80,135,139,443,445 -j DROP
iptables -I OUTPUT 2 -p tcp -m multiport --dport 1433,1314,1521,2222,3306,3433,3389,4899,8080,18186-j DROP
iptables -I OUTPUT 3 -p udp -j DROP
iptables -nvL
}
ubuntu_config_ufw()
{
ufwdeny out proto tcp to any port 21,22,23,25,53,80,135,139,443,445
ufwdeny out proto tcp to any port 1433,1314,1521,2222,3306,3433,3389,4899,8080,18186
ufwdeny out proto udp to any
ufwstatus
}
####################Start###################
#check lock file ,one time only let thescript run one time
LOCKfile=/tmp/.$(basename $0)
if [ -f "$LOCKfile" ]
then
echo -e "\033[1;40;31mThe script is already exist,please next timeto run this script.\n\033[0m"
exit
else
echo -e "\033[40;32mStep 1.No lock file,begin to create lock fileand continue.\n\033[40;37m"
touch $LOCKfile
fi
#check user
if [ $(id -u) != "0" ]
then
echo -e "\033[1;40;31mError: You must be root to run this script,please use root to execute this script.\n\033[0m"
rm-f $LOCKfile
exit 1
fi
echo -e "\033[40;32mStep 2.Begen tocheck the OS issue.\n\033[40;37m"
os_release=$(check_os_release)
if [ "X$os_release" =="X" ]
then
echo -e "\033[1;40;31mThe OS does not identify,So this script isnot executede.\n\033[0m"
rm-f $LOCKfile
exit 0
else
echo -e "\033[40;32mThis OS is $os_release.\n\033[40;37m"
fi
echo -e "\033[40;32mStep 3.Begen toconfig firewall.\n\033[40;37m"
case "$os_release" in
redhat5|centos5|redhat6|centos6|aliyun5|aliyun6)
service iptables start
config_iptables
;;
debian6)
config_iptables
;;
ubuntu10|ubuntu1204|ubuntu1210)
ufwenable <
/sbin/iptables -P INPUT ACCEPT
/sbin/iptables -F
/sbin/iptables -X
/sbin/iptables -Z
/sbin/iptables -A INPUT -i lo -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 22 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT
/sbin/iptables -A INPUT -p tcp --dport 8080 -j ACCEPT
/sbin/iptables -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
/sbin/iptables -A INPUT -m state --state ESTABLISHED -j ACCEPT
/sbin/iptables -P INPUT DROP
service iptables save
此步骤參考http://www.netingcn.com/aliyun-iptables.html
因为作为webserver来使用，所以对外要开放 80 port，另外肯定要通过ssh进行server管理，22 port也要对外开放。当然最好是把ssh服务的默认port改掉，在公网上会有非常多人试图破解password的。假设改动port。记得要把该port对外开发，否则连不上就悲剧了。
以下提供配置规则的具体说明：
第一步：清空全部规则 当Chain INPUT (policy DROP)时运行/sbin/iptables -F后，你将和server断开连接 全部在清空全部规则前把policy DROP该为INPUT，防止悲剧发生，小心小心再小心 /sbin/iptables -P INPUT ACCEPT 清空全部规则 /sbin/iptables -F /sbin/iptables -X 计数器置0 /sbin/iptables -Z 第二步：设置规则 同意来自于lo接口的数据包，假设没有此规则，你将不能通过127.0.0.1訪问本地服务，比如ping 127.0.0.1 /sbin/iptables -A INPUT -i lo -j ACCEPT 开放TCP协议22端口，以便能ssh，假设你是在有固定ip的场所。能够使用 -s 来限定client的ip /sbin/iptables -A INPUT -p tcp --dport 22 -j ACCEPT 开放TCP协议80端口供web服务 /sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT 10.241.121.15是另外一台server的内网ip，因为之间有通信，接受全部来自10.241.121.15的TCP请求 /sbin/iptables -A INPUT -p tcp -s 10.241.121.15 -j ACCEPT 接受ping /sbin/iptables -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT 这条规则參看：http://www.netingcn.com/iptables-localhost-not-access-internet.html /sbin/iptables -A INPUT -m state --state ESTABLISHED -j ACCEPT 屏蔽上述规则以为的全部请求，必不可少。否则防火墙没有不论什么过滤的功能 /sbin/iptables -P INPUT DROP 能够使用 iptables -L -n 查看规则是否生效
至此防火墙就算配置好，可是这是暂时的，当重新启动iptables或重新启动机器，上述配置就会被清空。要想永久生效，还须要例如以下操作：
/etc/init.d/iptables save 或 service iptables save 运行上述命令能够在文件 /etc/sysconfig/iptables 中看到配置
下面提供一个干净的配置脚本：
/sbin/iptables -P INPUT ACCEPT /sbin/iptables -F /sbin/iptables -X /sbin/iptables -Z /sbin/iptables -A INPUT -i lo -j ACCEPT /sbin/iptables -A INPUT -p tcp --dport 22 -j ACCEPT /sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT /sbin/iptables -A INPUT -p tcp -s 10.241.121.15 -j ACCEPT /sbin/iptables -A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT /sbin/iptables -A INPUT -m state --state ESTABLISHED -j ACCEPT /sbin/iptables -P INPUT DROP
最后运行 。先确保ssh连接没有问题，防止规则错误。导致无法连上server。由于没有save。重新启动server规则都失效，否则就仅仅有去机房才干改动规则了。也能够參考：ubuntu iptables 配置脚本来写一个脚本。
4、经常使用网络监控命令
（1） netstat -tunl：查看全部正在监听的port
[root@AY1407041017110375bbZ ~]# netstat -tunl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
udp 0 0 ip:123 0.0.0.0:*
udp 0 0 ip:123 0.0.0.0:*
udp 0 0 127.0.0.1:123 0.0.0.0:*
udp 0 0 0.0.0.0:123 0.0.0.0:* 当中123port用于NTP服务。
（2）netstat -tunp：查看全部已连接的网络连接状态，并显示其PID及程序名称。
[root@AY1407041017110375bbZ ~]# netstat -tunp
Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 96 ip:22 221.176.33.126:52699 ESTABLISHED 926/sshd
tcp 0 0 ip:34385 42.156.166.25:80 ESTABLISHED 1003/aegis_cli
依据上述结果，能够依据须要kill掉对应进程。
如:
kill -9 1003
（3）netstat -tunlp
（4）netstat经常使用选项说明：
-t: tcp
-u : udp
-l, --listening
Show only listening sockets. (These are omitted by default.)
-p, --program
Show the PID and name of the program to which each socket belongs.
--numeric , -n
Show numerical addresses instead of trying to determine symbolic host, port or user names.
5、改动ssh的监听port
（1）改动 /etc/ssh/sshd_config
原有的port 22
改为port 44
（2）重新启动服务
/etc/init.d/sshd restart
（3）查看情况
netstat -tunl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:44 0.0.0.0:* LISTEN
udp 0 0 ip:123 0.0.0.0:*
udp 0 0 ip:123 0.0.0.0:*
udp 0 0 127.0.0.1:123 0.0.0.0:*
udp 0 0 0.0.0.0:123 0.0.0.0:* 版权声明：本文博客原创文章，博客，未经同意，不得转载。