A popular open source VPN app is OpenVPN. This software is licensed under GNU GPL and allows you to connect devices like client server or point installed behind NAT firewalls without making changes to settings. The developer of OpenVPN is James Jonah,ovpn file
To create a secure control channel, the program uses the free OpenSSL library. Meanwhile, the work uses a full set of zeros applied in this library. For added security, OpenVPN can use the HMAC license, increasing encryption speed - hardware acceleration.
Today, the software is widely used in Unix-like OpenBSD, Solaris, FreeBSD, GNU / Linux, NetBSD, QNX, and MacOS X systems, as well as Windows.
License options
The program provides authentication of several types:
By login and password. To establish a connection, you need a server certificate, but a client certificate may not be created.
Certificate Authentication This method allows you to make the most flexible settings.
With a key already installed. This is the simplest implementation.
Network
All network operations within OpenVPN are done either through UDP or via TCP port. The program works through most proxy servers, including HTTP, as well as NAT and other network filters. Network settings can also be obtained from the server by the client, especially IP addresses, connection parameters, and routing settings.
OpenVPN technology uses the TUN / TAP driver, where two types of network interfaces are implemented: IP-tunnel TUN (Layer 3 based) and Ethernet TAP (Layer 2 based)), and the program can use LZO compression to compress the sent data. Version 2.0 makes it possible to create multiple tunnels at the same time, unlike its predecessor, which created one tunnel per process.
With UDP and TCP Unified, OpenVPN can compete with IPsec if your internet provider blocks VPN protocols.
Practice test
Our VPN service fully supports work on OpenVPN technology. To connect, you need to install OpenVPN client software and download configuration files. You can do this by simply entering your code on the VPN page in the section and selecting the appropriate items.
Report
