iSCSI: IPsec tunnel / transport mode decision

["Ofer Biran" <BIRAN@il.ibm.com>]

I'd like to drive this open issue into group consensus. It seems to
me that the tendency was more toward making tunnel mode a MUST as iFCP
and FCIP did, mainly due the option of integrating an existing IPsec
chip/box with the iSCSI implementation offering. If we reach this decision,
we may choose even not to mention transport mode (as MAY or some other
recommending text).

There is an excellent analysis made by Bernard Aboba in Section
"5.1. Transport mode versus tunnel mode" of draft-ietf-ips-security-04
( http://www.ietf.org/internet-drafts/draft-ietf-ips-security-04.txt )
that can help us with this decision (also Section "5.2. NAT traversal" is
relevant).

   Regards,
     Ofer

Ofer Biran
Storage and Systems Technology
IBM Research Lab in Haifa
biran@il.ibm.com  972-4-8296253