IKEv2/IPSEC "Road Warrior" VPN Tunneling?

[Karl Denninger]

Is there a "cookbook" for setting this up?  There are examples for
setting up a tunnel between two fixed-address networks (e.g. a remote
LAN that needs to be "integrated" with a central LAN over IPSec but I
can't find anything addressing the other situation -- remote user(s)
where the connecting IPs are not known in advance, such as a person with
a laptop or smartphone in a random hotel.

(And is there a better list for this in the freebsd-* paradigm for the
question?)

-- 
-- Karl Denninger
/The Market Ticker ®/ <http://market-ticker.org>
Cuda Systems LLC