IPSEC between PFSense 2.3.1 and Zyxel USG 1100 Router



  • Hi all,

    We want to deploy IPSec VPN Tunnel between PFSense and Zyxel UGS 1100.
    After many hours of tests, we can't connect Tunnels.

    IPSec Logs

    Nov 28 14:09:52    charon      15[IKE] <con1000|1>IKE_SA con1000[1] state change: CONNECTING => DESTROYING
    Nov 28 14:09:52    charon      15[IKE] <con1000|1>received AUTHENTICATION_FAILED error notify
    Nov 28 14:09:52    charon      15[ENC] <con1000|1>parsed INFORMATIONAL_V1 request 925911566 [ N(AUTH_FAILED) ]
    Nov 28 14:09:52    charon      15[NET] <con1000|1>received packet: from 31.222.199.115[500] to 109.7.30.198[500] (91 bytes)
    Nov 28 14:09:52    charon      15[NET] <con1000|1>sending packet: from 109.7.30.198[500] to 31.222.199.115[500] (164 bytes)</con1000|1></con1000|1></con1000|1></con1000|1></con1000|1>

    According to https://doc.pfsense.org/index.php/IPsec_Troubleshooting it seems to be from the negotiation mode (main / aggressive).

    We change all configuration parameters between the two routers without success.

    I can publish all the configuration parameters we used, if wanted.
    Is there anybody who knows this error and how to troubleshoot that situation ?