This document outlines a solution for the Mobile IPv4 (MIPv4) and IPsec coexistence problem for enterprise users. The solution consists of an applicability statement for using Mobile IPv4 and IPsec for session mobility in corporate remote access scenarios@ and a required mechanism for detecting the trusted internal network securely.
RFC 5265-2008 history
2008RFC 5265-2008 Mobile IPv4 Traversal across IPsec-Based VPN Gateways