IPSec VPN: everything you need to know about this feature – LeBigData.fr

Guarantors of the stability and reliability of the service used, VPN protocols are a feature that should not be overlooked with regard to an anonymous and secure connection. However, not all solutions achieve the same level of security and do not offer the same confidentiality conditions. For its part, the Internet Protocol Security (IPSec) VPN guarantees cryptographic security as well as optimal authentication of the origin of the data, integrity, confidentiality and anti-replay.

To offer a confidentiality, integrity and authentication mechanism that meets user requirements, VPN software publishers must integrate into their solution tunneling protocols. These will make it possible to create a virtual tunnel on publicly shared networks which will ensure encryption at the source of network traffic. But also the circulation of data transferred and received by a user between his device and the server Free VPN or paying.

Thus, the choice of a VPN protocol plays a key role not only in browsing security, but also in the speed and efficient transmission of data on the web. Recommended by the National Security Agency (NSA) and the Cybersecurity and Infrastructure Security Agency (CISA), IPSec VPN is a suite of protocols that establish encrypted connections between devices. More details.

IPSec VPN: what is it and how does it work?

Standardized in 1995 by theInternet Engineering Task Force (IETF), IPSec is a set of secure communication protocols specially designed to protect network flows. Concretely, this functionality makes it possible to establish a private and encrypted communication between remote entities. This is to secure data sent over public and unsecured networks while authenticating the provenance of IP packets.

To do this, IPSec VPN connections pass through a number of steps.

First of all, secure transmission protocols (SA) ensure the exchange of keys necessary for the encryption and decryption of messages sent and received between devices.

Next, IPSec breaks down the data sent into data packets containing payloads (the actual data sent) and an IP header (information about that data).

Once the decomposition is done, VPN IPSec authenticates the origin of each packet thanks to the AH protocol. In parallel, the ESP protocol (Encapsulating Security Protocol) encrypts payloads and IP header to keep data sent secure and private.

In effect, the data packets therefore contain both authentication and encryption information.

Finally, the UDP transport protocol will allow the transmission of identified and encrypted data packets to their destination. Once arrived at their destination, the packets are decrypted to allow applications and browsers to use the data sent.

What about VPN solutions that support IPSec?

While there are many communication protocols on the market today, a number of VPN providers have chosen to integrate the IPSec protocol into their solution.


With 5585 industry-leading VPN servers, NordVPN lets you choose an ultra-secure remote server in 59 countries around the world that relays your data securely over the internet. As a result, it not only ensures your online security, but also your anonymity and browsing comfort. Especially since this VPN uses NGE (Next Generation Encryption) in IKEv2/IPSec to provide you with high performance cryptographic algorithms and keys.

Discover our NordVPN review for more details.


In addition to providing you with the cheapest premium VPN on the market, Surfshark allows you to bypass geographical censorship so that you can fully enjoy all the content posted on your favorite SVOD platforms. In terms of security, this VPN also combines the positive points by offering the ultimate in technology to guarantee the protection of your internet browsing. The solution notably supports the IKEv2/IPSec protocol to guarantee you stability and speed. This also allows you to change networks on demand.

Discover our Surfshark review to know more.


Considered one of the best VPNs available on the market today, CyberGhost guarantees the maximum protection of your data thanks to the most stable and fastest communication protocol ever known: IKEv2/IPSec. This protocol is so effective that even the most advanced threats would take years to infiltrate your network. Moreover, it allowsexchange data and stream seamlessly.

Check out our Cyberghost review for more details.

In general, IPSec is a level 3 protection layer which makes it possible to secure the TCP/IP connection thanks to the authentication and encryption of IP packets. Concretely, this protocol suite creates a private tunnel that will encrypt the payloads, encapsulate another IP packet and transfer them through the Internet. In detail, an IPSec VPN will help protect your network traffic against a number of threats such as replay attacks. This while guaranteeing the authentication and encryption of data before transmission.

In addition, the IPSec VPN has the advantage of being compatible with the majority of network equipment as well as configurations using NAT.

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IPSec VPN: everything you need to know about this feature – LeBigData.fr

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