i have an Ubuntu 11.10 (oneiric) server running on a ReadyNAS. Im planning to use this to accept ipsec+l2tp connections through a router. However, the connection is failing somewhere half through. Using Openswan IPsec U2.6.28/K3.0.0-12-generic and trying to connect with an iOS 5 iPhone 4S.

This is how far i can get:

auth.log:

Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "PSK"
Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "L2TP-PSK-NAT"
Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "L2TP-PSK-noNAT"
Jan 19 13:54:11 ubuntu pluto[1990]: added connection description "passthrough-for-non-l2tp"
Jan 19 13:54:11 ubuntu pluto[1990]: listening for IKE messages
Jan 19 13:54:11 ubuntu pluto[1990]: NAT-Traversal: Trying new style NAT-T
Jan 19 13:54:11 ubuntu pluto[1990]: NAT-Traversal: ESPINUDP(1) setup failed for new style NAT-T family IPv4 (errno=19)
Jan 19 13:54:11 ubuntu pluto[1990]: NAT-Traversal: Trying old style NAT-T
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface eth0/eth0 192.168.19.99:500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface eth0/eth0 192.168.19.99:4500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface lo/lo 127.0.0.1:500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface lo/lo 127.0.0.1:4500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface lo/lo ::1:500
Jan 19 13:54:11 ubuntu pluto[1990]: adding interface eth0/eth0 2001:470:28:81:a00:27ff:*
Jan 19 13:54:11 ubuntu pluto[1990]: loading secrets from "/etc/ipsec.secrets"
Jan 19 13:54:11 ubuntu pluto[1990]: loading secrets from "/var/lib/openswan/ipsec.secrets.inc"
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [RFC 3947] method set to=109
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike] method set to=110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [8f8d83826d246b6fc7a8a6a428c11de8]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [439b59f8ba676c4c7737ae22eab8f582]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [4d1e0e136deafa34c4f3ea9f02ec7285]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [80d0bb3def54565ee84645d4c85ce3ee]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: ignoring unknown Vendor ID payload [9909b64eed937c6573de52ace952fa6b]
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-03] meth=108, but already using method 110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02] meth=107, but already using method 110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [draft-ietf-ipsec-nat-t-ike-02_n] meth=106, but already using method 110
Jan 19 14:04:31 ubuntu pluto[1990]: packet from 95.*.*.233:500: received Vendor ID payload [Dead Peer Detection]
Jan 19 14:04:31 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: responding to Main Mode from unknown peer 95.*.*.233
Jan 19 14:04:31 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: transition from state STATE_MAIN_R0 to state STATE_MAIN_R1
Jan 19 14:04:31 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: STATE_MAIN_R1: sent MR1, expecting MI2
Jan 19 14:04:33 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: NAT-Traversal: Result using draft-ietf-ipsec-nat-t-ike (MacOS X): both are NATed
Jan 19 14:04:33 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: transition from state STATE_MAIN_R1 to state STATE_MAIN_R2
Jan 19 14:04:33 ubuntu pluto[1990]: "PSK"[1] 95.*.*.233 #1: STATE_MAIN_R2: sent MR2, expecting MI3
Jan 19 14:05:03 ubuntu pluto[1990]: ERROR: asynchronous network error report on eth0 (sport=500) for message to 95.*.*.233 port 500, complainant 95.*.*.233: Connection refused [errno 111, origin ICMP type 3 code 3 (not authenticated)]

Router config UDP 500, 1701 and 4500 forwarded to 192.168.19.99 (Ubuntu server for ipsec). Ipsec passthrough enabled.

/etc/ipsec.conf

# /etc/ipsec.conf - Openswan IPsec configuration file

# This file:  /usr/share/doc/openswan/ipsec.conf-sample
#
# Manual:     ipsec.conf.5


version 2.0     # conforms to second version of ipsec.conf specification

config setup
 nat_traversal=yes
 #charonstart=yes
 #plutostart=yes
 protostack=netkey

conn PSK
 authby=secret
 forceencaps=yes
 pfs=no
 auto=add
 keyingtries=3
 dpdtimeout=60
 dpdaction=clear
 rekey=no
 left=192.168.19.99
 leftnexthop=192.168.19.1
 leftprotoport=17/1701
 right=%any
 rightprotoport=17/%any
 rightsubnet=vhost:%priv,%no
 dpddelay=10
 #dpdtimeout=10
 #dpdaction=clear

include /etc/ipsec.d/l2tp-psk.conf

/etc/ipsec.d/l2tp-psk.conf

conn L2TP-PSK-NAT
 rightsubnet=vhost:%priv
 also=L2TP-PSK-noNAT

conn L2TP-PSK-noNAT
 #
 # PreSharedSecret needs to be specified in /etc/ipsec.secrets as
 # YourIPAddress     %any: "sharedsecret"
 authby=secret
 pfs=no
 auto=add
 keyingtries=3
 # we cannot rekey for %any, let client rekey
 rekey=no
 # Set ikelifetime and keylife to same defaults windows has
 ikelifetime=8h
 keylife=1h
 # l2tp-over-ipsec is transport mode
 type=transport
 #
 left=192.168.19.99
 #
 # For updated Windows 2000/XP clients,
 # to support old clients as well, use leftprotoport=17/%any
 leftprotoport=17/1701
 #
 # The remote user.
 #
 right=%any
 # Using the magic port of "0" means "any one single port". This is
 # a work around required for Apple OSX clients that use a randomly
 # high port, but propose "0" instead of their port.
 rightprotoport=17/%any
 dpddelay=10
 dpdtimeout=10
 dpdaction=clear

conn passthrough-for-non-l2tp
 type=passthrough
 left=192.168.19.99
 leftnexthop=192.168.19.1
 right=0.0.0.0
 rightsubnet=0.0.0.0/0
 auto=route

/etc/ipsec.secrets

include /var/lib/openswan/ipsec.secrets.inc

%any %any: PSK "my-key"
192.168.19.99 %any: PSK "my-key"

/etc/xl2tpd/xl2tpd.conf

[global]
debug network = yes
debug tunnel = yes
ipsec saref = no
listen-addr = 192.168.19.99

[lns default]
ip range = 192.168.19.201-192.168.19.220
local ip = 192.168.19.99
require chap = yes
refuse chap = no
refuse pap = no
require authentication = no
ppp debug = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes

/etc/ppp/options.xl2tpd

pcp-accept-local
ipcp-accept-remote
noccp
auth
crtscts
idle 1800
mtu 1410
mru 1410
defaultroute
debug
lock
proxyarp
connect-delay 5000
ipcp-accept-local

/etc/ppp/chap-secrets

# Secrets for authentication using CHAP
# client        server  secret                  IP addresses
maciekish * my-secret *
* maciekish my-secret *

I can't seem to find the problem. Other ipsec connections to other hosts work from the network im currently at.