编辑 PVE 宿主机网卡文件
#在编辑文件之前建议先安装 vim
apt update && apt install vim -y
#然后编辑网卡配置文件
vim /etc/network/interfaces网卡配置文件内容如下：
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5)
source /etc/network/interfaces.d/*
auto lo
iface lo inet loopback
allow-hotplug enp1s0
iface enp4s0 inet manual
auto vmbr0
iface vmbr0 inet static
address 101.102.103.104/32
gateway 101.102.103.1
bridge-ports enp1s0
bridge-stp off
bridge-fd 0
auto vmbr1
iface vmbr1 inet static
address 192.168.1.1
netmask 255.255.255.0
bridge_ports none
bridge_stp off
bridge_fd 0
post-up echo 1 > /proc/sys/net/ipv4/ip_forward
post-up bash /root/iptables.config.sh
post-up iptables -t nat -A POSTROUTING -s '192.168.1.0/24' -o vmbr0 -j MASQUERADE
post-down iptables -t nat -D POSTROUTING -s '192.168.1.0/24' -o vmbr0 -j MASQUERADEPVE 宿主机的网卡名为 enp1s0，vmbr0 为独立IP虚拟机的桥接网卡，自行修改为正确的信息；vmbr1 为 NAT 虚拟机的桥接网卡，虚拟机可以使用的内网为 192.168.1.2-192.168.1.254 这些内网IP，网关为 192.168.1.1。
在 /root 目录下新建脚本文件 iptables.sh 脚本内容如下：
#! /bin/bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
#ConfFile
iptablesconf='https://cdn.otakusay.com/root/iptables.config.sh'
function rootness(){
if [[ $EUID -ne 0 ]]; then
echo "脚本需要以ROOT权限运行!"
exit 1
fi
}
function conf_list(){
cat $iptablesconf
}
function conf_add(){
if [ ! -f $iptablesconf ];then
echo "找不到配置文件!"
exit 1
fi
echo "请输入虚拟机的内网IP"
read -p "(Default: Exit):" confvmip
[ -z "$confvmip" ] && exit 1
echo
echo "虚拟机内网IP = $confvmip"
echo
while true
do
echo "请输入虚拟机的端口:"
read -p "(默认端口: 22):" confvmport
[ -z "$confvmport" ] && confvmport="22"
expr $confvmport + 0 &>/dev/null
if [ $? -eq 0 ]; then
if [ $confvmport -ge 1 ] && [ $confvmport -le 65535 ]; then
echo
echo "虚拟机端口 = $confvmport"
echo
break
else
echo "输入错误，端口范围应为1-65535!"
fi
else
echo "输入错误，端口范围应为1-65535!"
fi
done
echo
while true
do
echo "请输入宿主机的端口"
read -p "(默认端口: 8899):" natconfport
[ -z "$natconfport" ] && natconfport="8899"
expr $natconfport + 0 &>/dev/null
if [ $? -eq 0 ]; then
if [ $natconfport -ge 1 ] && [ $natconfport -le 65535 ]; then
echo
echo "宿主机端口 = $natconfport"
echo
break
else
echo "输入错误，端口范围应为1-65535!"
fi
else
echo "输入错误，端口范围应为1-65535!"
fi
done
echo "请输入转发协议:"
read -p "(tcp 或者 udp ,回车默认操作: 退出):" conftype
[ -z "$conftype" ] && exit 1
echo
echo "协议类型 = $conftype"
echo
iptablesshell="iptables -t nat -A PREROUTING -i vmbr0 -p $conftype --dport $natconfport -j DNAT --to-destination $confvmip:$confvmport"
if [ `grep -c "$iptablesshell" $iptablesconf` != '0' ]; then
echo "配置已经存在"
exit 1
fi
get_char(){
SAVEDSTTY=`stty -g`
stty -echo
stty cbreak
dd if=/dev/tty bs=1 count=1 2> /dev/null
stty -raw
stty echo
stty $SAVEDSTTY
}
echo
echo "回车继续，Ctrl+C退出脚本"
char=`get_char`
echo $iptablesshell >> $iptablesconf
runreturn=`$iptablesshell`
echo $runreturn
echo '配置添加成功'
}
function add_confs(){
rootness
conf_add
}
function del_conf(){
echo
while true
do
echo "请输入宿主机的端口"
read -p "(默认操作: 退出):" confserverport
[ -z "$confserverport" ] && exit 1
expr $confserverport + 0 &>/dev/null
if [ $? -eq 0 ]; then
if [ $confserverport -ge 1 ] && [ $confserverport -le 65535 ]; then
echo
echo "宿主机端口 = $confserverport"
echo
break
else
echo "输入错误，端口范围应为1-65535!"
fi
else
echo "输入错误，端口范围应为1-65535!"
fi
done
echo
iptablesshelldel=`cat $iptablesconf | grep "dport $confserverport"`
if [ ! -n "$iptablesshelldel" ]; then
echo "配置文件中没有该宿主机的端口"
exit 1
fi
iptablesshelldelshell=`echo ${iptablesshelldel//-A/-D}`
runreturn=`$iptablesshelldelshell`
echo $runreturn
sed -i "/$iptablesshelldel/d" $iptablesconf
echo '配置删除成功'
}
function del_confs(){
printf "你确定要删除配置吗？操作是不可逆的(y/n) "
printf "\n"
read -p "(默认: n):" answer
if [ -z $answer ]; then
answer="n"
fi
if [ "$answer" = "y" ]; then
rootness
del_conf
else
echo "配置删除操作取消"
fi
}
action=$1
case "$action" in
add)
add_confs
;;
list)
conf_list
;;
del)
del_confs
;;
*)
echo "参数错误! [${action} ]"
echo "用法: `basename $0` {add|list|del}"
;;
esac然后在 /root 目录下新建脚本配置文件 iptables.config.sh 脚本配置文件内容如下：
#!/usr/bin/env bash
使用方法：
上传脚本到宿主机 root 目录，赋予iptables.config.sh可执行权限 chmod +x iptables.config.sh
bash iptables.sh add #添加端口映射
bash iptables.sh del #删除端口映射