Is IPsec faster than IKEv2?

The big question for the coming IETF standards meeting in Prague, is whether to standardize IPSec or IKEv2 as the IETF IPsec standard.

The question is not a technical one, but a political one. The two protocols are fundamentally different, and the advantages and disadvantages of each have been debated for years.

I had a chance to try out the new version of OpenVPN today, and I was surprised to find that OpenVPN 2.2 seems to be faster than previous versions. Is this a bug, or is it actually faster?

The problem with OpenVPN 2.2 is that it has many different commands. The new v2.2 syntax is a little less intuitive than previous versions. So, I'm going to explain how to set up the VPN tunnel with OpenVPN 2.2 in three different ways:

In addition, I'll explain what each command does, and why you should use each command, even if the syntax is a little strange. OpenVPN 2.2 Syntax Here is the OpenVPN 2.2 syntax: # OpenVPN 2.2 configuration file. # Port number of the TCP/UDP OpenVPN port. # Address of the remote server, default is tun0 # If you want to connect to the server on your local network, specify your # subnet. # Example: 10.8.0/24 # Use IP and not FQDN. # For more information, visit # # Local address # By default, the server will bind to the IP address configured in the OS # with the interface tun0 # For example, if the interface is eth0, specify the IP address # 192.168.

Is IKEv2 better than OpenVPN?

In his OpenVPN article, Ben Smith says IKEv2 is a better and more secure option than OpenVPN.

That certainly sounds like a claim IKEv2 proponents would make, since it appears to support things OpenVPN does not, but I want to know the pros and cons of both protocols before I commit to changing from OpenVPN to IKEv2. I have been using OpenVPN for years now, and it works well for my purposes. Is IKEv2 superior?

1 Answer.
IKEv2 is the modern successor to the older, more complex IPSec. It's much less complicated and easier to set up.

OpenVPN, in its current configuration (the version provided with the default OS installation) is a simplified version of IPSec (RFC 2401/2409), with a few features removed, and a few new features added. Here's a quick list of the main differences: IKEv2 supports IPv6. IKEv2 uses UDP instead of TCP (and even then only for a subset of the communication protocol). IKEv2 is simpler to configure. IKEv2 has a higher level of security and complexity (to ensure security). IKEv2 offers a better (more consistent and reliable) experience than OpenVPN, especially when it comes to troubleshooting (it's easier to diagnose and resolve issues because you can see exactly what's going on). IKEv2 uses TLS instead of UDP. OpenVPN was originally designed as a replacement for IPSec (which is why it supports the original authentication mechanisms like MD5, SHA1, etc) and to that end it supports pretty much everything IPSec supports, including NAT-traversal and client-certificate-based authentication. In contrast, IKEv2 is designed from the ground-up as a modern replacement for IPSec. Its support of NAT-traversal was built into its design, and it also includes an optional "virtual NAT" mode that works in much the same way.

The VPN Protocols. OpenVPN and IKEv2 are not "protocols", they're just standardised communication mechanisms that implement VPN functionality.

Is OpenVPN better than IPsec?

IPsec (IP security) is a protocol developed by the IETF and widely used for securing IP based networks. It's the de facto standard for securing corporate and government networks (as well as consumer networks - eg. Residential Wi-Fi). IPsec is very secure and can be used to form end-to-end secured tunnels (eg between two ISPs, or between an ISP and a company data center).

While it has become commonplace to use IPsec to secure data transmission across a corporate network, for most of us (non-enterprise users), it doesn't make sense to secure the network traffic coming out of our internet-connected personal devices (eg home computers, tablets, phones). For most of us, it's perfectly fine to use open or web-based VPN solutions to do this. While a VPN endpoint would likely have to be hardened with access control to prevent the kind of attack described above, for most people there is no business case for deploying end-to-end secured tunnels as opposed to using VPN connections to do end-to-end network traffic.

While both technologies (IPsec and VPN) use tunneling to do the work of protecting data flows, the main difference between IPsec and OpenVPN is how they achieve this tunneling. IPsec works by encrypting data before it leaves the source, and then decrypting the data when it arrives at its destination. However, because this is done on a peer to peer basis (which results in a single point of failure), IPsec only allows one end of the connection to do the decryption. On the other hand, OpenVPN and similar software are designed to encrypt all traffic end-to-end (eg between the VPN server to the company network), and then to send the data on its way. As this happens in a client to server manner, there's no reliance on a peer to peer connection and so there's no single point of failure.

Because of this fundamental difference between the types of tunneling used, what the VPN endpoints should be doing, and how they do it, we're going to focus on comparing these different solutions in terms of their pros and cons. We will start with OpenVPN, but then will look at IPsec.

Which VPN solution is more secure, IKEv2 or IPsec?

Question: I have some VPN related questions, and I was hoping that someone could help me figure this out.

If you connect to a VPN server for a connection, how secure is the VPN? For example, say you have a router that supports both IPSec and IKEv2. Let's say the VPN provider uses IPSec, but you set up your computer to use IKEv2. If someone manages to hijack your traffic, can they still see what information is going out over the VPN? Also, if the VPN is compromised, what are the chances that they could see your private data? As part of the VPN handshake, IKEv2 provides authentication of the server. That means that the VPN client needs to have authentication to trust the server.

If your VPN server uses OpenVPN with SHA2-512-CBC, there are some nice details about this in the OpenVPN Handbook on the Authentication chapter.