# vpndemo

**Repository Path**: freelw/vpndemo

## Basic Information

- **Project Name**: vpndemo
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-03-26
- **Last Updated**: 2021-03-26

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# vpn demo
## 功能
* 将一台拥有公网ip的服务器和一台能访问公网的服务器通过tunnel连接到一个虚拟局域网中
## 编译    
* 直接make生成两个可执行文件 server 和 client

## 配置ip
修改vpnrc文件中的环境变量


	export VPN_CLIENT_IP=172.20.10.151
	export VPN_SERVER_IP=172.20.10.150
	export SERVER_REAL_IP=211.159.147.17
	export VPN_MASK=24
含义：

* VPN_CLIENT_IP 客户端局域网ip
* VPN_SERVER_IP 服务端局域网ip
* VPN_MASK	子网掩码
* SERVER_REAL_IP 服务端的公网ip

## 运行方法
先启动服务端

	[root@VM-0-11-centos vpndemo]# ./start_server.sh
	sleeping 5s...

再启动客户端

	[root@VM-0-15-centos vpndemo]# ./start_client.sh
	sleeping 5s...

## ping测试
在172.20.10.151上

	[root@VM-0-15-centos vpndemo]# ping 172.20.10.150
	PING 172.20.10.150 (172.20.10.150) 56(84) bytes of data.
	64 bytes from 172.20.10.150: icmp_seq=1 ttl=64 time=2.52 ms
	64 bytes from 172.20.10.150: icmp_seq=2 ttl=64 time=2.57 ms
	64 bytes from 172.20.10.150: icmp_seq=3 ttl=64 time=2.54 ms
	64 bytes from 172.20.10.150: icmp_seq=4 ttl=64 time=2.55 ms

## tcp测试
在172.20.10.151上

	[root@VM-0-15-centos vpndemo]# nc -lk 9001
	hello
	hi vpn demo!

在172.20.10.150上

	[root@VM-0-11-centos vpndemo]# nc 172.20.10.151 9001
	hello
	hi vpn demo!

## 架构图

	+-------------------------------------+                      +--------------------------------------------------+
	|                                     |                      |                                                  |
	|                                     |                      |                                                  |
	|  +--------+                         |                      |                        +---------------------+   |
	|  |        |	 port:1234            |       socket         |                        |                     |   |
	|  | server |  <------------------------------------------------------------------->  |      client         |   |
	|  |        |                         |                      |                        |                     |   |
	|  | listen |  <---------+            |                      |           +--------->  |      connect        |   |
	|  |        |            |            |                      |           |            |                     |   |
	|  |  1234  |   +------------------+  |                      |  +------------------+  | 211.159.147.17:1234 |   |
	|  |        |   |       tun0       |  |                      |  |       tun0       |  |                     |   |
	|  +--------+   | 172.20.10.150/24 |  |                      |  | 172.20.10.151/24 |  +---------------------+   |
	|               +------------------+  |                      |  +------------------+                            |
	|                        ^            |                      |           ^                                      |
	|                        |            |                      |           |                                      |
	|                        |            |                      |           |                                      |
	|               +------------------+  |                      |   +------------------+                           |
	|               |    nc conncet    |  |                      |   |    nc listen     |                           |
	|               |172.20.10.151 9001|  |                      |   |      9001        |                           |
	|               +------------------+  |                      |   +------------------+                           |
	+-------------------------------------+                      +--------------------------------------------------+