How to configure IKEv2 VPN?

What is the difference between IKEv1 and IKEv2?

IPsec Security Protocols IKEv1 and IKEv2 support the exchange of security keys and are considered IPsec Security Protocols (hence the name). They both use a shared secret to establish a mutual authentication, authentication and confidentiality between the peers.

Difference between IPsec & SSL in the context of web server security - what's it all about? IPsec is a protocol that provides network-level security. It is widely used for communication over the Internet, for VPNs and in enterprise network infrastructure. IPsec also provides authentication of the parties to a communication.

How does SSL/TLS work? SSL/TLS is an encryption protocol which provides both confidentiality and authentication of the remote parties. Its purpose is to create an "encrypted tunnel" between a client and server, usually an HTTPS connection. The protocol works by encrypting all of the data sent over the connection using asymmetric encryption. That is, the encryption keys are different. SSL/TLS is often called "web encryption" because of the common use of HTTP, HTTPS, SMTP and IMAP.

What is the difference between SSL/TLS and IPSec? IPSec is a protocol that provides both confidentiality and authentication of the remote parties. It is used for VPNs, intranet networks and enterprise network infrastructure. IPSec also provides authentication of the parties to a communication. It is different from SSL/TLS because it is a two-way handshake protocol. That is, the traffic is encrypted on both the sending and receiving ends.

Difference between IPSec and SSL. One key difference between IPSec and SSL is the authentication process. With IPSec, a shared secret (the RSA algorithm) is exchanged. Once the parties have agreed to the shared secret, it is used to authenticate subsequent communications. With SSL, no secret is exchanged and only a session ID is used to authenticate the sender and receiver.

Does IKEv2 use TCP?

In IKEv2, does the payload of the exchange (in the IKESA) use TCP or UDP? For example, when I send a request to the other party, will the "payload" of the IKESA exchange use TCP or UDP? Does the payload of the exchange use TCP or UDP? The answer is no, because a UDP tunnel is used. In IKEv2 (and more generally in ISAKMP/IKE) the payload of an exchange (which is called SA) uses UDP, and the packet-size is always 64 bytes. In case of a TCP connection, the packet size could be 65.535 bytes.

In case of both protocols, the payload is encrypted with a key derived from the group exchange parameters. IKEv2 (and all of ISAKMP) use a UDP tunnel and is protected by IPsec. I don't know how the specific implementation does it, but you can easily find an implementation that does this, or you can look at the source code yourself.

So your payload data is not sent using TCP. As far as I know, it uses UDP, but I can't find any definitive sources to prove it. It's also possible to implement it using TCP, but not sure if it's necessary.

The draft version of the IKEv2 protocol standard says that the IKE message is a UDP packet. 2

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