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Encapsulating Security Payload (ESP) is a member of the IPsec protocol suite. It provides origin authenticity through source authentication , data integrity through hash functions and confidentiality through encryption protection for IP packets .
Encapsulating Security Payload (ESP) 50: Carries encrypted data for secure communication Destination Options (before upper-layer header) 60: Options that need to be examined only by the destination of the packet Mobility (currently without upper-layer header) 135: Parameters used with Mobile IPv6: Host Identity Protocol: 139
Establishment of Encapsulating Security Payload (ESP) communication in transport mode. The IP protocol number for ESP is 50 (compare TCP's 6 and UDP's 17). At this point, a secure channel has been established, but no tunneling is taking place. Negotiation and establishment of L2TP tunnel between the SA endpoints.
Generic Routing Encapsulation: RFC 2784, RFC 2890: 0x30 48 DSR Dynamic Source Routing Protocol RFC 4728: 0x31 49 BNA Burroughs Network Architecture 0x32 50 ESP Encapsulating Security Payload: RFC 4303: 0x33 51 AH Authentication Header: RFC 4302: 0x34 52 I-NLSP Integrated Net Layer Security Protocol: TUBA 0x35 53 SwIPe SwIPe: RFC 5237: 0x36 54 NARP
Standard Mobility support: There is a standard extension for IKEv2 named [rfc:4555 Mobility and Multihoming Protocol] (MOBIKE) (see also, IPsec) used to support mobility and multihoming for it and Encapsulating Security Payload (ESP). By use of this extension IKEv2 and IPsec can be used by mobile and multihomed users.
This works like port numbers in TCP and UDP connections. What it means is that there could be different SAs used to provide security to one connection. An SA could therefore act as a set of rules. Carried in Encapsulating Security Payload (ESP) header or Authentication Header (AH), its length is 32 bits. [1]
ESP Encapsulating Security Payload over IP or IPSec; ... Protocol Encapsulation Chart - A PDF file illustrating the relationship between common protocols and the OSI ...
This requirement will help to make IPsec implementations more interoperable between devices from different vendors. The IPsec Authentication Header (AH) and the Encapsulating Security Payload header (ESP) are implemented as IPv6 extension headers. [29]