虛擬私人網路(英語:virtual private network,縮寫:VPN)將專用網路延伸到公共網路上,使使用者能夠在共享或公共網路上傳送和接收資料,就像他們的計算裝置直接連接到專用網路上一樣。VPN的好處包括增加專用網路的功能、安全性和管理,它提供了對公共網路上無法存取的資源存取通常用於遠端辦公人員。加密很常見但不是VPN連接的原生部分。 VPN是通過使用專用線路或在現有網路上使用隧道協定建立一個虛擬的對等連接而形成的。可從公共 Internet 獲得的 VPN可以提供廣域網路 (WAN) 的一些好處。 從使用者的角度來看,可以遠端存取專用網路中可用的資源。

n2n VPN


n2n is a layer-two peer-to-peer virtual private network (VPN) which allows users to exploit features typical of P2P applications at network instead of application level. This means that users can gain native IP visibility (e.g. two PCs belonging to the same n2n network can ping each other) and be reachable with the same network IP address regardless of the network where they currently belong. In a nutshell, as OpenVPN moved SSL from application (e.g. used to implement the https protocol) to network protocol, n2n moves P2P from application to network level.

In order to start using n2n, two elements are required:

A virtual network shared between multiple edge nodes in n2n is called a community. A single supernode can relay multiple communities and a single computer can be part of multiple communities at the same time. An encryption key can be used by the edge nodes to encrypt the packets within their community.

n2n tries to establish a direct peer-to-peer connection via udp between the edge nodes when possible. When this is not possible (usually due to special NAT devices), the supernode is also used to relay the packets.




Download: https://github.com/ntop/n2n


sudo dpkg -i n2n_3.0.0-1038_amd64.deb
sudo apt install -f

One-liner command in foreground.

# On Linux, change the community, encrypt key and tun IP to your own
# edge -c <community> -k <encrypt key> -a <tun IP address> -l <supernode host:port> -f
sudo edge -c my-community -k my-secret -a -l n2n.lucktu.com:10090 -f

Run as service in background.

# Generate the config file
sudo cp /etc/n2n/edge.conf.sample /etc/n2n/edge.conf

# Start the edge
sudo systemctl start edge
sudo systemctl enable edge
sudo supernode -p 10090



Freelan is a free, open-source, multi-platform, peer-to-peer VPN software that abstracts a LAN over the Internet. It works on Windows, Linux and Mac OSX.

Whether you want to connect the computers of your family, play an old LAN-only game with your friends, or give a privileged access to your private network to your collaborators, freelan will do the job perfectly.

FreeLAN is free all-around VPN open-source software for Windows, Linux, and macOS that can be used to create three types of VPN:


Download: https://www.freelan.org/download.html


sudo apt update
sudo apt install freelan


  1. 下載 Visual C++
  2. 下載 freelan-2.2.0-amd64-install.exe

One-liner command in foreground.

# On PC#1, which is correctly configured to allow access to the 12000/UDP from the internet.
# By default, the listen port is 12000/UDP and the tun_tap.ip_address is
freelan --security.passphrase "my_secret"

# On PC#2
freelan --security.passphrase "my_secret" --tap_adapter.ipv4_address_prefix_length --fscp.contact <IP-to-PC1>:12000



Outline 讓所有使用者都能執行自己專屬的 VPN,以更安全的方式存取無審查的開放網路。透過 Outline 執行專屬 VPN 伺服器不但使存取網路變得更安全,網路連線也較不容易遭人蓄意封鎖。