Hi Lars,

I think the problem is that an AEAD (Authenticated Encryption) algorithm
specified for use with IKE does not require the definition of a
data integrity algorithm but of a PRF. Therefore try the following
directives:

  ike=aes256gcm128-prfsha512-ecp512bp!

See also our example scenario

https://www.strongswan.org/testing/testresults/openssl-ikev2/alg-aes-gcm/moon.ipsec.conf

Best regards

Andreas

On 12.05.2016 12:44, Lars Alex Pedersen wrote:
I have successfully been using pfsense 2.2.6 with rw clients connecting into
with IKEv2 PSK and with the following ipsec.conf.

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

config setup
         charondebug="cfg 1, dmn 2, ike 1"

conn %default
         ikelifetime=28800s
         lifetime=10800s
         margintime=600s
         keyingtries=1
         keyexchange=ikev2
         type=tunnel
         dpdaction=clear
         dpddelay=900s
         ike=aes256gcm128-sha512-ecp512bp!
         esp=aes256gcm128-ecp512bp!
         authby=psk

AES-GCM Is used for both IKE and ESP but in the newest version of pfsense
AES-GCM is removed in IKE_SA (aka phase 1) with the reason that AES GCM
isn't a valid option for IKE_SA.

So my question is if AES-GCM is a valid option in IKE_SA.

https://github.com/pfsense/pfsense/commit/76bec1ab8790964c9714f7f8497edfa1a6
c53409

Best regards
Lars Alex Pedersen



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Andreas Steffen                         [email protected]
strongSwan - the Open Source VPN Solution!          www.strongswan.org
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil
CH-8640 Rapperswil (Switzerland)
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