/etc/freeradius/sites-available/proxy-inner-tunnel is in freeradius 2.1.12+dfsg-1.2ubuntu8.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47  | # -*- text -*-
######################################################################
#
#	This is a virtual server that handles *only* inner tunnel
#	requests for EAP-TTLS and PEAP types.
#
#	$Id$
#
######################################################################
server proxy-inner-tunnel {
#
#  This example is very simple.  All inner tunnel requests get
#  proxied to another RADIUS server.
#
authorize {
	#
	#  Do other things here, as necessary.
	#
	#  e.g. run the "realms" module, to decide how to proxy
	#  the inner tunnel request.
	#
	update control {
		#  You should update this to be one of your realms.
		Proxy-To-Realm := "example.com"
	}
}
authenticate {
	#
	#  This is necessary so that the inner tunnel EAP-MSCHAPv2
	#  method can be called.  That method takes care of turning
	#  EAP-MSCHAPv2 into plain MS-CHAPv2, if necessary.
	eap
}
post-proxy {
	#
	#  This is necessary for LEAP, or if you set:
	#
	#  proxy_tunneled_request_as_eap = no
	#
	eap
}
}
 |