%% You should probably cite draft-ietf-v6ops-ipsec-tunnels instead of this I-D. @techreport{tschofenig-v6ops-secure-tunnels-03, number = {draft-tschofenig-v6ops-secure-tunnels-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-tschofenig-v6ops-secure-tunnels/03/}, author = {Hannes Tschofenig}, title = {{Using IPsec to Secure IPv6-over-IPv4 Tunnels}}, pagetotal = 22, year = 2004, month = dec, day = 20, abstract = {This document gives guidance on securing IPv6-in-IPv4 tunnels using IPsec. No additional protocol extensions are described beyond those available with the IPsec framework. This document describes packet formats, IPsec security policy database for various scenarios, address configuration procedures, and the usage of the Extensible Authentication Procotol.}, }