jaesing.blogg.se - Check point vpn tunnel encrytion

#Check point vpn tunnel encrytion software

Lifetime: Specifies the lifetime of the Phase. This shared key is used to protect Phase 2 negotiations, unless PFS (Perfect forward secrecy) for Phase 2 is enabled, which causes the gateway to run DH again in Phase 2 to generate a new shared key for encryption.Īuthentication method: Can be either a pre-shared Key or a Certificate Through math they arrive at a symmetric shared key. DH starts by exchanging public and private keys. It is used in IPsec for authentication.Įncryption Algorithm: It is used for encryption (DES, 3DES, AES).ĭiffie-Hellman (DH): The Diffie-Hellman (DH) key exchange algorithm is a method used to make a shared encryption key available to two entities without an exchange of the key. No other party cannot predict the function value in advance. Contains nonce values from the initiator and the responder. Hash Algorithm: Hash is a pseudo-random function (PRFs).

Phase 1 Includes: Hash algorithm, Encryption Algorithm, Diffie-Hellman (DH), Authentication Method and Lifetime of the IKE Phase 1 tunnel. Asymmetric encryption is used to build a first phase, since it is more secure (but more CPU intensive) The main purpose of phase 1 is to establish a secure connection and authenticate peers. Internet Key Exchange (IKE) is the protocol used to set up a secure authenticated communication between peers NAT Traversal is used to overcome NAT, since ESP doesn’t support NAT, the technology adds a fake UDP port 4500 header on each IPsec packet

Authentication - via Digital Signatures or Pre-shared key (PSK)Įncapsulates all data.

Data Integrity – via hashing (method that guarantees the data was not changed).

IPsec (IP Security) – is a secure network protocol suite that is used for authentication and encryption over the Internet Protocol (3rd Layer of the OSI model). There are different ways how these functions can be done, but we are going to be exploring IPsec.

A session key is generated, which is used for encryption and decryption of the traffic.

Peers agree on what protocols will be used for encryption, what subnets will be used etc.

Peers have to authenticate each other to make sure the encrypted traffic is sent to a proper destination.

There are main stages how VPN session is being established. When you are setting up client-to-site connection, you define an encryption domain on one side, and define clients that will have access to these encryption domains. If we are connecting a remote user to access corporate resources, that type of connection is called client-to-siteĭevices that are performing encryption and decryption are called peers.Īn administrator defines an Encryption domain (hosts, networks and other objects that have to go to the VPN tunnel). If we are connecting a whole site to another site, that type of connection is called site-to-site. VPN connection is also private, thus the traffic should be encrypted. VPN (Virtual Private Network) – is a logical connection designed to interconnect networks that are physically not in the same location. Therefore, in today’s post I want to discuss the following topics

#Check point vpn tunnel encrytion software

I have been working as a Technical Support for Check Point Software Technologies in a VPN team. I want to share some of my expertise that might be helpful. My name is Evgenii, and I have been working with networking products for years.