[Openswan Users] Interpreting "no connection is known" (FreeSwan 1.97)

Patrick Naubert patrickn at xelerance.com
Fri Jun 7 12:07:22 UTC 2013

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From: Justin Love <mail at JustinLove.name>
Subject: Interpreting "no connection is known" (FreeSwan 1.97)
Date: 3 June, 2013 12:22:42 PM EDT
To: users at lists.openswan.org

I have someone who was using a cellular network adapter  in modem mode, and is now switching to one that runs in either wifi or ethernet over USB.  Unfortunately, the laptop can no longer connect to the FreeSwan based L2TP server.

The error message is 

cannot respond to IPsec SA request because no connection is known for[@laptop.our.windows.domain]:17/1701===0

ipsec status says that the connection is defined as

Do I have to configure something to account for the gateway?

I've spent hours in years past trying to debug the same message trying to connect with my own computer (OS X), going through my local router, and I gave up.  I never got completely clear on how the ascii art corresponds to the config files or how to change things to make it match.

config setup
	interfaces = %defaultroute
	X-enabled = yes
	klipsdebug = none
	plutodebug = none
	plutoload = %search
	plutostart = %search
	manualstart = 
	uniqueids = yes

conn BobsConnection
	type = tunnel
	left = %defaultroute
	x-interface = %defaultroute
	right =
	auto = add
	keyexchange = ike
	authby = secret
	auth = esp
	pfs = no
	pfsgroup = MODP1024
	ike = "3DES-SHA-MODP1024"
	esp = "3DES-SHA1"
	keyingtries = 0
	ikelifetime = 3600
	keylife = 3600
	rekeymargin = 600
	rekeyfuzz = 100%
	x-l2tpd = yes

Justin Love -- http://JustinLove.name/

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