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端口转发/iptables-pf.sh

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+#!/usr/bin/env bash
+PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
+export PATH
+
+#=================================================
+#	System Required: CentOS/Debian/Ubuntu
+#	Description: iptables Port forwarding
+#	Version: 1.1.1
+#	Author: Toyo
+#	Blog: https://doub.io/wlzy-20/
+#=================================================
+sh_ver="1.1.1"
+
+Green_font_prefix="\033[32m" && Red_font_prefix="\033[31m" && Green_background_prefix="\033[42;37m" && Red_background_prefix="\033[41;37m" && Font_color_suffix="\033[0m"
+Info="${Green_font_prefix}[信息]${Font_color_suffix}"
+Error="${Red_font_prefix}[错误]${Font_color_suffix}"
+Tip="${Green_font_prefix}[注意]${Font_color_suffix}"
+
+check_iptables(){
+	iptables_exist=$(iptables -V)
+	[[ ${iptables_exist} = "" ]] && echo -e "${Error} 没有安装iptables，请检查 !" && exit 1
+}
+check_sys(){
+	if [[ -f /etc/redhat-release ]]; then
+		release="centos"
+	elif cat /etc/issue | grep -q -E -i "debian"; then
+		release="debian"
+	elif cat /etc/issue | grep -q -E -i "ubuntu"; then
+		release="ubuntu"
+	elif cat /etc/issue | grep -q -E -i "centos|red hat|redhat"; then
+		release="centos"
+	elif cat /proc/version | grep -q -E -i "debian"; then
+		release="debian"
+	elif cat /proc/version | grep -q -E -i "ubuntu"; then
+		release="ubuntu"
+	elif cat /proc/version | grep -q -E -i "centos|red hat|redhat"; then
+		release="centos"
+    fi
+	#bit=`uname -m`
+}
+install_iptables(){
+	iptables_exist=$(iptables -V)
+	if [[ ${iptables_exist} != "" ]]; then
+		echo -e "${Info} 已经安装iptables，继续..."
+	else
+		echo -e "${Info} 检测到未安装 iptables，开始安装..."
+		if [[ ${release}  == "centos" ]]; then
+			yum update
+			yum install -y iptables
+		else
+			apt-get update
+			apt-get install -y iptables
+		fi
+		iptables_exist=$(iptables -V)
+		if [[ ${iptables_exist} = "" ]]; then
+			echo -e "${Error} 安装iptables失败，请检查 !" && exit 1
+		else
+			echo -e "${Info} iptables 安装完成 !"
+		fi
+	fi
+	echo -e "${Info} 开始配置 iptables !"
+	Set_iptables
+	echo -e "${Info} iptables 配置完毕 !"
+}
+Set_forwarding_port(){
+	read -e -p "请输入 iptables 欲转发至的 远程端口 [1-65535] (支持端口段 如 2333-6666, 被转发服务器):" forwarding_port
+	[[ -z "${forwarding_port}" ]] && echo "取消..." && exit 1
+	echo && echo -e "	欲转发端口 : ${Red_font_prefix}${forwarding_port}${Font_color_suffix}" && echo
+}
+Set_forwarding_ip(){
+		read -e -p "请输入 iptables 欲转发至的 远程IP(被转发服务器):" forwarding_ip
+		[[ -z "${forwarding_ip}" ]] && echo "取消..." && exit 1
+		echo && echo -e "	欲转发服务器IP : ${Red_font_prefix}${forwarding_ip}${Font_color_suffix}" && echo
+}
+Set_local_port(){
+	echo -e "请输入 iptables 本地监听端口 [1-65535] (支持端口段 如 2333-6666)"
+	read -e -p "(默认端口: ${forwarding_port}):" local_port
+	[[ -z "${local_port}" ]] && local_port="${forwarding_port}"
+	echo && echo -e "	本地监听端口 : ${Red_font_prefix}${local_port}${Font_color_suffix}" && echo
+}
+Set_local_ip(){
+	read -e -p "请输入 本服务器的 网卡IP(注意是网卡绑定的IP，而不仅仅是公网IP，回车自动检测外网IP):" local_ip
+	if [[ -z "${local_ip}" ]]; then
+		local_ip=$(wget -qO- -t1 -T2 ipinfo.io/ip)
+		if [[ -z "${local_ip}" ]]; then
+			echo "${Error} 无法检测到本服务器的公网IP，请手动输入"
+			read -e -p "请输入 本服务器的 网卡IP(注意是网卡绑定的IP，而不仅仅是公网IP):" local_ip
+			[[ -z "${local_ip}" ]] && echo "取消..." && exit 1
+		fi
+	fi
+	echo && echo -e "	本服务器IP : ${Red_font_prefix}${local_ip}${Font_color_suffix}" && echo
+}
+Set_forwarding_type(){
+	echo -e "请输入数字 来选择 iptables 转发类型:
+ 1. TCP
+ 2. UDP
+ 3. TCP+UDP\n"
+	read -e -p "(默认: TCP+UDP):" forwarding_type_num
+	[[ -z "${forwarding_type_num}" ]] && forwarding_type_num="3"
+	if [[ ${forwarding_type_num} == "1" ]]; then
+		forwarding_type="TCP"
+	elif [[ ${forwarding_type_num} == "2" ]]; then
+		forwarding_type="UDP"
+	elif [[ ${forwarding_type_num} == "3" ]]; then
+		forwarding_type="TCP+UDP"
+	else
+		forwarding_type="TCP+UDP"
+	fi
+}
+Set_Config(){
+	Set_forwarding_port
+	Set_forwarding_ip
+	Set_local_port
+	Set_local_ip
+	Set_forwarding_type
+	echo && echo -e "——————————————————————————————
+	请检查 iptables 端口转发规则配置是否有误 !\n
+	本地监听端口    : ${Green_font_prefix}${local_port}${Font_color_suffix}
+	服务器 IP\t: ${Green_font_prefix}${local_ip}${Font_color_suffix}\n
+	欲转发的端口    : ${Green_font_prefix}${forwarding_port}${Font_color_suffix}
+	欲转发 IP\t: ${Green_font_prefix}${forwarding_ip}${Font_color_suffix}
+	转发类型\t: ${Green_font_prefix}${forwarding_type}${Font_color_suffix}
+——————————————————————————————\n"
+	read -e -p "请按任意键继续，如有配置错误请使用 Ctrl+C 退出。" var
+}
+Add_forwarding(){
+	check_iptables
+	Set_Config
+	local_port=$(echo ${local_port} | sed 's/-/:/g')
+	forwarding_port_1=$(echo ${forwarding_port} | sed 's/-/:/g')
+	if [[ ${forwarding_type} == "TCP" ]]; then
+		Add_iptables "tcp"
+	elif [[ ${forwarding_type} == "UDP" ]]; then
+		Add_iptables "udp"
+	elif [[ ${forwarding_type} == "TCP+UDP" ]]; then
+		Add_iptables "tcp"
+		Add_iptables "udp"
+	fi
+	Save_iptables
+	clear && echo && echo -e "——————————————————————————————
+	iptables 端口转发规则配置完成 !\n
+	本地监听端口    : ${Green_font_prefix}${local_port}${Font_color_suffix}
+	服务器 IP\t: ${Green_font_prefix}${local_ip}${Font_color_suffix}\n
+	欲转发的端口    : ${Green_font_prefix}${forwarding_port_1}${Font_color_suffix}
+	欲转发 IP\t: ${Green_font_prefix}${forwarding_ip}${Font_color_suffix}
+	转发类型\t: ${Green_font_prefix}${forwarding_type}${Font_color_suffix}
+——————————————————————————————\n"
+}
+View_forwarding(){
+	check_iptables
+	forwarding_text=$(iptables -t nat -vnL PREROUTING|tail -n +3)
+	[[ -z ${forwarding_text} ]] && echo -e "${Error} 没有发现 iptables 端口转发规则，请检查 !" && exit 1
+	forwarding_total=$(echo -e "${forwarding_text}"|wc -l)
+	forwarding_list_all=""
+	for((integer = 1; integer <= ${forwarding_total}; integer++))
+	do
+		forwarding_type=$(echo -e "${forwarding_text}"|awk '{print $4}'|sed -n "${integer}p")
+		forwarding_listen=$(echo -e "${forwarding_text}"|awk '{print $11}'|sed -n "${integer}p"|awk -F "dpt:" '{print $2}')
+		[[ -z ${forwarding_listen} ]] && forwarding_listen=$(echo -e "${forwarding_text}"| awk '{print $11}'|sed -n "${integer}p"|awk -F "dpts:" '{print $2}')
+		forwarding_fork=$(echo -e "${forwarding_text}"| awk '{print $12}'|sed -n "${integer}p"|awk -F "to:" '{print $2}')
+		forwarding_list_all=${forwarding_list_all}"${Green_font_prefix}"${integer}".${Font_color_suffix} 类型: ${Green_font_prefix}"${forwarding_type}"${Font_color_suffix} 监听端口: ${Red_font_prefix}"${forwarding_listen}"${Font_color_suffix} 转发IP和端口: ${Red_font_prefix}"${forwarding_fork}"${Font_color_suffix}\n"
+	done
+	echo && echo -e "当前有 ${Green_background_prefix} "${forwarding_total}" ${Font_color_suffix} 个 iptables 端口转发规则。"
+	echo -e ${forwarding_list_all}
+}
+Del_forwarding(){
+	check_iptables
+	while true
+	do
+	View_forwarding
+	read -e -p "请输入数字 来选择要删除的 iptables 端口转发规则(默认回车取消):" Del_forwarding_num
+	[[ -z "${Del_forwarding_num}" ]] && Del_forwarding_num="0"
+	echo $((${Del_forwarding_num}+0)) &>/dev/null
+	if [[ $? -eq 0 ]]; then
+		if [[ ${Del_forwarding_num} -ge 1 ]] && [[ ${Del_forwarding_num} -le ${forwarding_total} ]]; then
+			forwarding_type=$(echo -e "${forwarding_text}"| awk '{print $4}' | sed -n "${Del_forwarding_num}p")
+			forwarding_listen=$(echo -e "${forwarding_text}"| awk '{print $11}' | sed -n "${Del_forwarding_num}p" | awk -F "dpt:" '{print $2}' | sed 's/-/:/g')
+			[[ -z ${forwarding_listen} ]] && forwarding_listen=$(echo -e "${forwarding_text}"| awk '{print $11}' |sed -n "${Del_forwarding_num}p" | awk -F "dpts:" '{print $2}')
+			Del_iptables "${forwarding_type}" "${Del_forwarding_num}"
+			Save_iptables
+			echo && echo -e "${Info} iptables 端口转发规则删除完成 !" && echo
+		else
+			echo -e "${Error} 请输入正确的数字 !"
+		fi
+	else
+		break && echo "取消..."
+	fi
+	done
+}
+Uninstall_forwarding(){
+	check_iptables
+	echo -e "确定要清空 iptables 所有端口转发规则 ? [y/N]"
+	read -e -p "(默认: n):" unyn
+	[[ -z ${unyn} ]] && unyn="n"
+	if [[ ${unyn} == [Yy] ]]; then
+		forwarding_text=$(iptables -t nat -vnL PREROUTING|tail -n +3)
+		[[ -z ${forwarding_text} ]] && echo -e "${Error} 没有发现 iptables 端口转发规则，请检查 !" && exit 1
+		forwarding_total=$(echo -e "${forwarding_text}"|wc -l)
+		for((integer = 1; integer <= ${forwarding_total}; integer++))
+		do
+			forwarding_type=$(echo -e "${forwarding_text}"|awk '{print $4}'|sed -n "${integer}p")
+			forwarding_listen=$(echo -e "${forwarding_text}"|awk '{print $11}'|sed -n "${integer}p"|awk -F "dpt:" '{print $2}')
+			[[ -z ${forwarding_listen} ]] && forwarding_listen=$(echo -e "${forwarding_text}"| awk '{print $11}'|sed -n "${integer}p"|awk -F "dpts:" '{print $2}')
+			# echo -e "${forwarding_text} ${forwarding_type} ${forwarding_listen}"
+			Del_iptables "${forwarding_type}" "${integer}"
+		done
+		Save_iptables
+		echo && echo -e "${Info} iptables 已清空 所有端口转发规则 !" && echo
+	else
+		echo && echo "清空已取消..." && echo
+	fi
+}
+Add_iptables(){
+	iptables -t nat -A PREROUTING -p "$1" --dport "${local_port}" -j DNAT --to-destination "${forwarding_ip}":"${forwarding_port}"
+	iptables -t nat -A POSTROUTING -p "$1" -d "${forwarding_ip}" --dport "${forwarding_port_1}" -j SNAT --to-source "${local_ip}"
+	echo "iptables -t nat -A PREROUTING -p $1 --dport ${local_port} -j DNAT --to-destination ${forwarding_ip}:${forwarding_port}"
+	echo "iptables -t nat -A POSTROUTING -p $1 -d ${forwarding_ip} --dport ${forwarding_port_1} -j SNAT --to-source ${local_ip}"
+	echo "${local_port}"
+	iptables -I INPUT -m state --state NEW -m "$1" -p "$1" --dport "${local_port}" -j ACCEPT
+}
+Del_iptables(){
+	iptables -t nat -D POSTROUTING "$2"
+	iptables -t nat -D PREROUTING "$2"
+	iptables -D INPUT -m state --state NEW -m "$1" -p "$1" --dport "${forwarding_listen}" -j ACCEPT
+}
+Save_iptables(){
+	if [[ ${release} == "centos" ]]; then
+		service iptables save
+	else
+		iptables-save > /etc/iptables.up.rules
+	fi
+}
+Set_iptables(){
+	echo -e "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
+	sysctl -p
+	if [[ ${release} == "centos" ]]; then
+		service iptables save
+		chkconfig --level 2345 iptables on
+	else
+		iptables-save > /etc/iptables.up.rules
+		echo -e '#!/bin/bash\n/sbin/iptables-restore < /etc/iptables.up.rules' > /etc/network/if-pre-up.d/iptables
+		chmod +x /etc/network/if-pre-up.d/iptables
+	fi
+}
+Update_Shell(){
+	sh_new_ver=$(wget --no-check-certificate -qO- -t1 -T3 "https://raw.githubusercontent.com/ToyoDAdoubiBackup/doubi/master/iptables-pf.sh"|grep 'sh_ver="'|awk -F "=" '{print $NF}'|sed 's/\"//g'|head -1)
+	[[ -z ${sh_new_ver} ]] && echo -e "${Error} 无法链接到 Github !" && exit 0
+	wget -N --no-check-certificate "https://raw.githubusercontent.com/ToyoDAdoubiBackup/doubi/master/iptables-pf.sh" && chmod +x iptables-pf.sh
+	echo -e "脚本已更新为最新版本[ ${sh_new_ver} ] !(注意：因为更新方式为直接覆盖当前运行的脚本，所以可能下面会提示一些报错，无视即可)" && exit 0
+}
+check_sys
+echo && echo -e " iptables 端口转发一键管理脚本 ${Red_font_prefix}[v${sh_ver}]${Font_color_suffix}
+  -- Toyo | doub.io/wlzy-20 --
+  
+ ${Green_font_prefix}0.${Font_color_suffix} 升级脚本
+————————————
+ ${Green_font_prefix}1.${Font_color_suffix} 安装 iptables
+ ${Green_font_prefix}2.${Font_color_suffix} 清空 iptables 端口转发
+————————————
+ ${Green_font_prefix}3.${Font_color_suffix} 查看 iptables 端口转发
+ ${Green_font_prefix}4.${Font_color_suffix} 添加 iptables 端口转发
+ ${Green_font_prefix}5.${Font_color_suffix} 删除 iptables 端口转发
+————————————
+注意：初次使用前请请务必执行 ${Green_font_prefix}1. 安装 iptables${Font_color_suffix}(不仅仅是安装)" && echo
+read -e -p " 请输入数字 [0-5]:" num
+case "$num" in
+	0)
+	Update_Shell
+	;;
+	1)
+	install_iptables
+	;;
+	2)
+	Uninstall_forwarding
+	;;
+	3)
+	View_forwarding
+	;;
+	4)
+	Add_forwarding
+	;;
+	5)
+	Del_forwarding
+	;;
+	*)
+	echo "请输入正确数字 [0-5]"
+	;;
+esac