Re: IPSEC tunnels and Mobile IP

[Steve Bellovin <smb@research.att.com>]

	 > IMNSHO, Mobile IP is for mobile units. ie cars, tanks, soldiers, and
	 > pedestrians.  A notebook I plug into a phone jack in a hotel, car de
	aler,
	 > or conference LAN does not need Mobile IP, only IPsec.
	 
	 While not disagreeing in principle, I'd like to note that there is
	 tremendous utility in using a dynamically assigned IP address from the
	 wireless provider and setting up IPSEC tunneling associations
	 authenticated by user identity.  In this way, a laptop can be mobile
	 throughout a large wireless service structure and maintain secure
	 connections without the necessity for level 3 handoffs.

Yes.  IP addresses -- especially IP addresses of dial-up clients --
are transient and meaningless.  The sooner we get away from them,
the better.

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