Difference Between IKEv1 and IKEv2

--> IKEv1 requires symmetric authentication (both have to use the same method of authentication), whereas IKEv2 uses Asymmetric Authentication ( Means one side RSA, another side can be pre-shared-key). --> IKEv2 allows you to use separate keys for each direction which provides more security compared to IKEv1.

1. What is the difference between IKE Phase 1 and 2?
2. Is IKEv2 compatible with IKEv1?
3. Is IKEv1 insecure?
4. How does IKEv2 have less overhead than IKEv1?
5. At what protocol does Ike works?
6. What is IKEv2 protocol?
7. Is main mode IKEv1?
8. Does IKEv2 use aggressive mode?
9. What is difference between main mode and aggressive mode?
10. Is IKEv1 deprecated?
11. Is PPTP VPN secure?
12. Is IPsec still secure?

What is the difference between IKE Phase 1 and 2?

Phase 1 Security Associations are used to protect IKE messages that are exchanged between two IKE peers, or security endpoints. Phase 2 Security Associations are used to protect IP traffic, as specified by the security policy for a specific type of traffic, between two data endpoints.

Is IKEv2 compatible with IKEv1?

IKEv2 is not an update to IKEv1; in fact, IKEv2 is not backward compatible with IKEv1. Just think of IKEv2 as a revamp of the IKE protocol in general.

Is IKEv1 insecure?

Though this discovery is quite disputed in the internet security industry, though it is worth considering when choosing a VPN protocol. As mentioned above, the recent discovery of key-reuse vulnerability over IKEv1 makes the protocol really insecure.

How does IKEv2 have less overhead than IKEv1?

IKEv2 has less overhead. With less overhead, it offers improved SA setup latency. Multiple requests are allowed in transit (for example, when a multiple of child-SAs are set up in parallel). IKEv2 has a reduced SA delay.

At what protocol does Ike works?

Internet Key Exchange (IKE) is the protocol used to set up a secure, authenticated communications channel between two parties. IKE typically uses X. 509 PKI certificates for authentication and the Diffie–Hellman key exchange protocol to set up a shared session secret.

What is IKEv2 protocol?

IKEv2 (Internet Key Exchange version 2) is a VPN encryption protocol that handles request and response actions. It makes sure the traffic is secure by establishing and handling the SA (Security Association) attribute within an authentication suite – usually IPSec since IKEv2 is basically based on it and built into it.

Is main mode IKEv1?

IKEv1 Phase 1 Main mode has three pairs of messages (total six messages) between IPSec peers. IKE Phase 1 Aggressive Mode has only three message exchanges. The purpose of IKEv1 Phase 1 is to establish IKE SA. IKEv1 Phase 2 (Quick Mode) has only three messages.

Does IKEv2 use aggressive mode?

IKEv2 uses four messages; IKEv1 uses either nine messages (in main mode) or six messages (in aggressive mode).

What is difference between main mode and aggressive mode?

Main Mode uses a six-way handshake where parameters are exchanged in multiple rounds with encrypted authentication information. Aggressive Mode uses a three-way handshake where the VPN sends the hashed PSK to the client in a single unencrypted message.

Is IKEv1 deprecated?

IKEv1 is deprecated and MUST NOT be deployed. Systems running IKEv1 should be upgraded and reconfigured to run IKEv2. Systems that support IKEv1 but not IKEv2 are most likely also unsuitable candidates for continued operation. ... IKEv1 systems must be upgraded or replaced by IKEv2 systems.

Is PPTP VPN secure?

PPTP has many known security issues, and it's likely the NSA (and probably other intelligence agencies) are decrypting these supposedly “secure” connections. That means attackers and more repressive governments would have an easier way to compromise these connections. Yes, PPTP is common and easy to set up.

Is IPsec still secure?

VPN encryption prevents third parties from reading your data as it passes through the internet. IPSec and SSL are the two most popular secure network protocol suites used in Virtual Private Networks, or VPNs. IPSec and SSL are both designed to secure data in transit through encryption.