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

[Andreas Steffen]

Hello Ariel,

if you want an IKEv1 connection then please define

  keyexchange=ikev1

since ikev2 is the default.

Andreas

On 09/13/2011 08:35 PM, Ariel wrote:
> 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

======================================================================
Andreas Steffen                         andreas.steffen at strongswan.org
strongSwan - the Linux VPN Solution!                www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)
===========================================================[ITA-HSR]==