禁止非中国IP访问服务器

#!/bin/bash

start() {
    # 创建ipset集合
    ipset create china hash:net
    # 下载中国IP地址段并添加到ipset集合中
    wget -P /tmp/ "https://www.ipdeny.com/ipblocks/data/countries/cn.zone"
    # 等待文件下载完成
    while [ ! -f /tmp/cn.zone ]; do
        sleep 1
    done
    cat /tmp/cn.zone | while read line; do ipset add china $line; done
    # 设置iptables规则
    iptables -A INPUT -m set --match-set china src -j ACCEPT
    iptables -A INPUT -j DROP
}

stop() {
    # 删除iptables规则
    iptables -D INPUT -m set --match-set china src -j ACCEPT
    iptables -D INPUT -j DROP
    # 删除ipset集合
    ipset destroy china
}

case "\$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
    *)
        echo "Usage: \$0 {start|stop|restart}"
        exit 1
        ;;
esac

exit 0

禁止指定国家ip访问服务器

#! /bin/bash

Green="\033[32m"
Font="\033[0m"

#root权限
root_need(){
    if [[ $EUID -ne 0 ]]; then
        echo "Error:This script must be run as root!" 1>&2
        exit 1
    fi
}

#封禁ip
block_ipset(){
check_ipset
#添加ipset规则
echo -e "${Green}请输入需要封禁的国家代码，如cn(中国)，注意字母为小写！${Font}"
read -p "请输入国家代码:" GEOIP
echo -e "${Green}正在下载IPs data...${Font}"
wget -P /tmp http://www.ipdeny.com/ipblocks/data/countries/$GEOIP.zone 2> /dev/null
#检查下载是否成功
    if [ -f "/tmp/"$GEOIP".zone" ]; then
	 echo -e "${Green}IPs data下载成功！${Font}"
    else
	 echo -e "${Green}下载失败，请检查你的输入！${Font}"
	 echo -e "${Green}代码查看地址：http://www.ipdeny.com/ipblocks/data/countries/${Font}"
    exit 1
    fi
#创建规则
ipset -N $GEOIP hash:net
for i in $(cat /tmp/$GEOIP.zone ); do ipset -A $GEOIP $i; done
rm -f /tmp/$GEOIP.zone
echo -e "${Green}规则添加成功，即将开始封禁ip！${Font}"
#开始封禁
iptables -I INPUT -p tcp -m set --match-set "$GEOIP" src -j DROP
iptables -I INPUT -p udp -m set --match-set "$GEOIP" src -j DROP
echo -e "${Green}所指定国家($GEOIP)的ip封禁成功！${Font}"
}

#解封ip
unblock_ipset(){
echo -e "${Green}请输入需要解封的国家代码，如cn(中国)，注意字母为小写！${Font}"
read -p "请输入国家代码:" GEOIP
#判断是否有此国家的规则
lookuplist=`ipset list | grep "Name:" | grep "$GEOIP"`
    if [ -n "$lookuplist" ]; then
        iptables -D INPUT -p tcp -m set --match-set "$GEOIP" src -j DROP
	iptables -D INPUT -p udp -m set --match-set "$GEOIP" src -j DROP
	ipset destroy $GEOIP
	echo -e "${Green}所指定国家($GEOIP)的ip解封成功，并删除其对应的规则！${Font}"
    else
	echo -e "${Green}解封失败，请确认你所输入的国家是否在封禁列表内！${Font}"
	exit 1
    fi
}

#查看封禁列表
block_list(){
	iptables -L | grep match-set
}

#检查系统版本
check_release(){
    if [ -f /etc/redhat-release ]; then
        release="centos"
    elif cat /etc/issue | grep -Eqi "debian"; then
        release="debian"
    elif cat /etc/issue | grep -Eqi "ubuntu"; then
        release="ubuntu"
    elif cat /etc/issue | grep -Eqi "centos|red hat|redhat"; then
        release="centos"
    elif cat /proc/version | grep -Eqi "debian"; then
        release="debian"
    elif cat /proc/version | grep -Eqi "ubuntu"; then
        release="ubuntu"
    elif cat /proc/version | grep -Eqi "centos|red hat|redhat"; then
        release="centos"
    fi
}

#检查ipset是否安装
check_ipset(){
    if [ -f /sbin/ipset ]; then
        echo -e "${Green}检测到ipset已存在，并跳过安装步骤！${Font}"
    elif [ "${release}" == "centos" ]; then
        yum -y install ipset
    else
        apt-get -y install ipset
    fi
}

#开始菜单
main(){
root_need
check_release
clear
echo -e "———————————————————————————————————————"
echo -e "${Green}Linux VPS一键屏蔽指定国家所有的IP访问${Font}"
echo -e "${Green}1、封禁ip${Font}"
echo -e "${Green}2、解封iP${Font}"
echo -e "${Green}3、查看封禁列表${Font}"
echo -e "———————————————————————————————————————"
read -p "请输入数字 [1-3]:" num
case "$num" in
    1)
    block_ipset
    ;;
    2)
    unblock_ipset
    ;;
    3)
    block_list
    ;;
    *)
    clear
    echo -e "${Green}请输入正确数字 [1-3]${Font}"
    sleep 2s
    main
    ;;
    esac
}
main