[strongSwan] no connection has been authorized with policy=PSK

[Ariel]

I've updated my /etc/ipsec.conf to some more general settings:
conn L2TP
        authby=psk
        type=tunnel
        left=%defaultroute
        leftauth=psk
        leftnexthop=%defaultroute
        right=%any
        rightauth=psk
        auto=start


I am setting default authby to PSK (for IKEv1), and leftauth/rightauth both to PSK (for IKEv2, even though OSX seems to use IKEv1 only since pluto is picking up all connection attempts).  This conn definition should be catching *all* requests because left is defined as %defaultroute (ipsec.conf manpage says this means "any interface"), and right is defined as %any which means it can originate from any IP address.  With `ipsec statusall` I see:
Listening IP addresses:
  72.14.xxx.xx
  192.168.146.52
Connections:
        L2TP:  72.14.xxx.xx...%any
        L2TP:   local:  [72.14.xxx.xx] uses pre-shared key authentication
        L2TP:   remote: [%any] uses pre-shared key authentication
        L2TP:   child:  dynamic[udp/l2f] === 0.0.0.0/0[udp]


So it appears that it is properly identifying "left" as the local computer, and right as any remote host.  Both sides are hard set to using PSK.  But when I try to connect, in my pluto.log I still see:
packet from 96.57.xxx.xxx:500: initial Main Mode message received on 72.14.xxx.xx:500 but no connection has been authorized with policy=PSK


This... seems wrong.  Does no one have any advice, or maybe something I could look at for further debugging on my own?

-a



On Sep 12, 2011, at 4:36 PM, Ariel wrote:

> I'm setting up L2TP/IPSec on a Debian server for OSX clients and I am coming into a little trouble with the IPSec side with strongswan 4.5.2 (from the Debian testing repo).
> 
> My /etc/ipsec.conf
> config setup
>        charonstart=yes
>        plutostart=yes
>        nat_traversal=yes
>        plutodebug=all
>        plutostderrlog=/var/log/pluto.log
>        charondebug=4
> 
> conn L2TP
>        authby=psk
>        pfs=no
>        rekey=no
>        type=tunnel
>        esp=aes128-sha1
>        ike=aes128-sha-modp1024
>        left=72.14.xxx.xx
>        leftnexthop=%defaultroute
>        leftprotoport=17/1701
>        right=%any
>        rightprotoport=17/%any
>        rightsubnetwithin=0.0.0.0/0
>        auto=add
> 
> 
> My /etc/ipsec.secrets
> 72.14.xxx.xx    %any:     PSK   "password"
> 
> 
> # ipsec statusall
> 000 Status of IKEv1 pluto daemon (strongSwan 4.5.2):
> 000 interface lo/lo ::1:500
> 000 interface lo/lo 127.0.0.1:4500
> 000 interface lo/lo 127.0.0.1:500
> 000 interface eth0/eth0 72.14.xxx.xx:4500
> 000 interface eth0/eth0 72.14.xxx.xx:500
> 000 interface eth0:0/eth0:0 192.168.146.52:4500
> 000 interface eth0:0/eth0:0 192.168.146.52:500
> 000 %myid = '%any'
> 000 loaded plugins: test-vectors curl ldap aes des sha1 sha2 md5 random x509 pkcs1 pgp dnskey pem openssl gmp hmac xauth attr kernel-netlink resolve 
> 000 debug options: raw+crypt+parsing+emitting+control+lifecycle+kernel+dns+natt+oppo+controlmore
> 000 
> Status of IKEv2 charon daemon (strongSwan 4.5.2):
>  uptime: 10 minutes, since Sep 12 16:07:23 2011
>  malloc: sbrk 138668, mmap 0, used 135444, free 3224
>  worker threads: 7 idle of 16, job queue load: 0, scheduled events: 0
>  loaded plugins: test-vectors curl ldap aes des sha1 sha2 md5 random x509 revocation constraints pubkey pkcs1 pgp pem openssl fips-prf gmp agent pkcs11 xcbc hmac ctr ccm gcm attr kernel-netlink resolve socket-raw farp stroke updown eap-identity eap-aka eap-md5 eap-gtc eap-mschapv2 eap-radius eap-tls eap-ttls eap-tnc dhcp led addrblock 
> Listening IP addresses:
>  72.14.xxx.xx
>  192.168.146.52
> Connections:
>        L2TP:  72.14.xxx.xx...%any
>        L2TP:   local:  [72.14.xxx.xx] uses pre-shared key authentication
>        L2TP:   remote: [%any] uses any authentication
>        L2TP:   child:  dynamic[udp/l2f] === 0.0.0.0/0[udp] 
> Security Associations:
>  none
> 
> 
> When I try to do a VPN connection, it times out, in my OSX /var/log/ppp.log
> Mon Sep 12 16:08:47 2011 : L2TP connecting to server 'domain.org' (72.14.xxx.xx)...
> Mon Sep 12 16:08:47 2011 : IPSec connection started
> Mon Sep 12 16:08:57 2011 : IPSec connection failed
> 
> 
> On the Debian IPSec server in /var/log/pluto.log
> added connection description "L2TP"
> ...
> packet from 96.57.xxx.xx:500: initial Main Mode message received on 72.14.xxx.xx:500 but no connection has been authorized with policy=PSK
> 
> 
> I can't help but feel like I am very close but missing something very basic.  With my configuration above, I don't see how there is "no connection has been authorized with policy=PSK" because `ipsec statusall` seems to be telling a different story.  But maybe I am reading it wrong.  Any advice?
> 
> -a