IPsec protocols were originally defined in RFC 1825 through RFC 1829, which were published in 1995.A security association is simply the bundle of algorithms and parameters (such as keys) that is being used to encrypt and authenticate a particular flow in one direction.
IPsec VPN with Manual Keys Configuration Overview
ipsec key generate - Technical Documentation - SupportRFC 4304: Extended Sequence Number (ESN) Addendum to IPsec Domain of Interpretation (DOI) for Internet Security Association and Key Management Protocol (ISAKMP).
This ESP was originally derived from the US Department of Defense SP3D protocol, rather than being derived from the ISO Network-Layer Security Protocol (NLSP).The type of content that was protected is indicated by the Next Header field.Existing IPsec implementations usually include ESP, AH, and IKE version 2.A pre-shared key (PSK) or shared secret is a string of text a VPN (virtual private network) or other service.
RFC 4806: Online Certificate Status Protocol (OCSP) Extensions to IKEv2.This gives the communicating parties a way to generate fresh session keys without additional key sharing, making it practical to change session keys frequently.A monotonic strictly increasing sequence number (incremented by 1 for every packet sent) to prevent replay attacks.RFC 7383: Internet Key Exchange Protocol Version 2 (IKEv2) Message Fragmentation.I am trying to understand why do we really use those pre-shared keys when creating a IPSec tunnel.
RFC 4306: Internet Key Exchange (IKEv2) Protocol (obsoleted by RFC 5996 ).RFC 5386: Better-Than-Nothing Security: An Unauthenticated Mode of IPsec.In IPsec it provides origin authenticity, integrity and confidentiality protection of packets.
Tunnel vision: Choosing a VPN -- SSL VPN vs. IPSec VPNAddressing and Routing for VPNs Pre-shared Key Authentication for L2TP over IPSec Router-to-Router VPN Connections.RFC 5856: Integration of Robust Header Compression over IPsec Security Associations.
Categories: IPsec Internet protocols Internet layer protocols Cryptographic protocols Tunneling protocols Network layer protocols Hidden categories: Pages using RFC magic links Articles with DMOZ links Wikipedia articles with GND identifiers.RFC 4478: Repeated Authentication in Internet Key Exchange (IKEv2) Protocol.
RFC 4835: Cryptographic Algorithm Implementation Requirements for Encapsulating Security Payload (ESP) and Authentication Header (AH) (obsoleted by RFC 7321 ).A monotonically increasing sequence number (incremented by 1 for every packet sent) to protect against replay attacks.From all the reading that I have done the DH group creates the keys.Encryption provides confidentiality in the connection and preshared key that only you and the other party knows provides the authentication.In part 4 of his five-part series on the Cisco implementation of IPSec, Andrew Mason describes the Internet Key Exchange (IKE).
RFC 5857: IKEv2 Extensions to Support Robust Header Compression over IPsec.RFC 3715: IPsec-Network Address Translation (NAT) Compatibility Requirements.The IPsec Encapsulating Security Payload (ESP) is a direct derivative of the SP3 protocol.
Indeed, each sender can have multiple security associations, allowing authentication, since a receiver can only know that someone knowing the keys sent the data.RFC 6467: Secure Password Framework for Internet Key Exchange Version 2 (IKEv2).RFC 5930: Using Advanced Encryption Standard Counter Mode (AES-CTR) with the Internet Key Exchange version 02 (IKEv2) Protocol.
However, in Tunnel Mode, where the entire original IP packet is encapsulated with a new packet header added, ESP protection is afforded to the whole inner IP packet (including the inner header) while the outer header (including any outer IPv4 options or IPv6 extension headers) remains unprotected.RFC 2401: Security Architecture for the Internet Protocol (IPsec overview) (obsoleted by RFC 4301 ).RFC 5996: Internet Key Exchange Protocol Version 2 (IKEv2) (obsoleted by RFC 7296 ).