This protocol specification defines methods to encapsulate and
decapsulate IPsec Encapsulating Security Payload (ESP) packets inside
UDP packets for the purpose of traversing Network Address Translators.
ESP encapsulation can be used in both IPv4 and IPv6. ESP
encapsulation is used whenever negotiated by the Internet Key Exchange
Working Group Summary
The IPsec Working Group came to consensus on this document.
This document was reviewed by Russell Housley for the IESG.