OpenVPN Protocol

This highly configurable open-source VPN provides support for both site-to-site and client-to-side connections, and is the best all-round VPN protocol

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What is OpenVPN?

OpenVPN is a versatile and highly configurable VPN protocol with the ability to run on both TCP and UDP ports. Written by James Yonan, it offers up to AES 256-bit encryption, supports all major operating systems, and circumvents the most restrictive of firewalls.

Furthermore, it uses the OpenSSL library and SSLv3/TLSv1 protocols as well as allows peers to authenticate one another with pre-shared keys, certificates, or passwords. The open-source nature of OpenVPN is also a huge plus as it is backed by a community of developers.

Key Features of OpenVPN

Full Anonymity

OpenVPN can run over UDP or TCP tunnels, due to which your Internet traffic cannot be detected over Deep Packet Inspection (DPI)

Fast Speed

The TCP tunnel transport support on the OpenVPN protocol used by PureVPN lets users seamless online gaming, video conferencing, audio conferencing, & more.

High Security

OpenVPN keeps all your communications secure by using various methods, such as shared keys, HMAC authentication, and 256-bit encryption via OpenSSL.

Beats Firewalls

It can be run on any port between 1 and 65535. This multi-port functionality makes OpenVPN ideal for bypassing firewalls.

Perfect Forward Secrecy

The PFS feature in OpenVPN adds an extra layer of security to your VPN connection with complete secrecy and data integrity.

More Portable

Since it is implemented in the user space and only requires the TUN/TAP virtual network driver, OpenVPN is more portable and secure than other protocols.

OpenVPN Protocol Comparison

OpenVPN vs IKEv2 vs L2TP vs PPTP vs SSTP

The following is an in-depth comparison of OpenVPN against other common VPN protocols.

Encryption 256-bit 256-bit 256-bit 256-bit 128-bit
Security OpenVPN can be considered extremely securewhen used in conjunction with robust cipher andephemeral keys Latest VPN protocol which implements IPSec and is highly secure Can be considered as secure as OpenVPN when used in conjunction with robust cipher and ephemeral keys IPSec over L2TP, when properly implemented, has no major known vulnerabilities PPTP implementation has several known security vulnerabilities
Stability Stable Connection Highly stable and consistent connection once established Stable, but more so on Windows Stable Connection Unstable and may disconnect frequently
Speed Great speed across long distances and on connections with high latency Faster than other VPN protocols due to MOBIIKE support, which makes it stable and resilient Faster than PPTP and L2TP L2TL/IPSec is still fast, despite tunneling overhead, due to high encryption/decryption efficiency. Fastest VPN protocol because of basic encryption
Supported OS Windows OS iOS (Manual) Android Mac OS X (Manual) And More... Windows OS iOS Android (Manual) Mac OS X (Manual) BlackBerry (Manual) Windows OS iOS (Not Supported) Android (Not Supported) MAC OS X And More... Windows OS iOS (Manual) Android (Manual) Mac OS X (Manual) And More... All Platforms (Manual)
Conclusion Good speed, strong security, native support for most OS. Fast speed, strong security, the only VPN protocol supported by Blackberry Safer and faster than PPTP and L2TP, ideal for Windows OS, can easily bypass firewalls Easy-to-setup, stable, and secure Highly recommended for bypassing geo- restrictions quickly, but isn’t the best option for security

PureVPN offers support for all major VPN protocols and platforms.

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Pros & Cons of OpenVPN Protocol

OpenVPN Advantages

  • It is backed by the open-source community that catches and fixes any security issues promptly.
  • Capable of bypassing any firewall as it supports multiple ports.
  • Extremely secure as it uses up to AES 256-bit encryption.
  • Provides the best blend of both security and speed.
  • Compatible with major operating systems, including Windows, Mac, Linux, Android, and iOS.

OpenVPN Disadvantages

  • Requires third-party software and applications to run on every OS as it cannot be configured directly.
  • Setup is not easy and requires technical knowledge.
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How to Use OpenVPN

  • Subscribe to PureVPN
  • Download PureVPN Android app for your device
  • Launch the app and select your desired mode
  • Enjoy secure and speedy OpenVPN connection!
openvpn android
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For manual configuration on your preferred devices, check out these guides.

  • Subscribe to PureVPN
  • Download PureVPN Windows app for your device
  • Launch the app and go to Settings
  • Select the OpenVPN Protocol
  • Enjoy secure and speedy OpenVPN connection!
openvpn windows
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For manual configuration on your preferred devices, check out these guides.

How to Select the Best VPN Protocol?

Automatic Selection

PureVPN is all about ease of use. Our app can automatically select the VPN protocol most suitable for your connection. So, connect and rest assured that you are protected by the most advanced technology.

Manual Selection

However, you can also configure your VPN connection to use a different protocol. You should take a look at our comparison chart of all VPN protocols for a clear understanding of each has to offer. If you are still unsure about which one to use, it is recommended that you try these VPN protocols in the following order:

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Frequently Asked Questions

To put it simply, encryption refers to the process of converting plaintext data or information into indecipherable form in order to prevent unauthorized access. Similarly, VPN encryption protects all your data by scrambling it and making it gibberish to the prying eyes of hackers, service providers, governments, and corporations. PureVPN uses Advanced Encryption Standard (AES) with 256-bit keys, also referred to as AES-256. This encryption standard is used by the US government and banks as well as security experts around the world for protecting classified information. Furthermore, it is impossible to crack in theory due to an outrageously large number of possible combinations.
OpenVPN utilizes a client-server mode of operation to ensure safe communication between the client’s device and the Internet. The connection is composed of two tiers where the client connects to the server, which, in turn, connects it to the Internet. The client, as a result, assumes the identity of the server itself and also uses it physical location, thereby masking its actual identity. While the OpenSSL library is used for encrypting both data and control channels, the VPN protocol also employs pre-shared keys, passwords, and certificates for security. OpenVPN can be run on multiple ports and uses both UDP and TCP for transmission. Moreover, it allows the client to go through HTTP, NAT, as well as firewalls.
UDP is the acronym for User Datagram Protocol. Since it does not perform error correction, packets are received without any retries or acknowledgements. This makes UDP faster, but less reliable.
TCP is the acronym for Transmission Control Protocol. Unlike UDP, TCP performs error correction and its retransmission mechanism ensures packets are sent reliably at both ends. The increased reliability, however, results in increased latency.
If speed is your primary concern, then UDP is better for playing games, VoIP communications, streaming media, etc. TCP, on the other hand, will slow down your connection depending on various network factors. For this reason, you should switch to TCP only if you are experiencing connection issues or connecting to a nearby VPN server.
  • TCP = Reliable
  • UDP = Fast
OpenVPN uses UDP port 53 and TCP port 80 for transmission. In addition, it can also transmit data through other TCP ports of the range 5500 – 55000.
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