Getting this error tonight when trying to establish VPN connection. I won't have access to the remote logs until tomorrow. Posting in case any one has hit this issue before.
ubnt@ubnt:~$ sudo swanctl --log 12[CFG] received stroke: terminate 'peer-sombody.no-ip.org-tunnel-1' 12[CFG] no IKE_SA named 'peer-sombody.no-ip.org-tunnel-1' found 05[CFG] received stroke: initiate 'peer-sombody.no-ip.org-tunnel-1' 01[IKE] initiating Main Mode IKE_SA peer-sombody.no-ip.org-tunnel-1[2] to their.ip.xx 01[ENC] generating ID_PROT request 0 [ SA V V V V ] 01[NET] sending packet: from my.ip.xx[500] to their.ip.xx[500] (156 bytes) 16[NET] received packet: from their.ip.xx[500] to my.ip.xx[500] (128 bytes) 16[ENC] parsed ID_PROT response 0 [ SA V V ] 16[IKE] received NAT-T (RFC 3947) vendor ID 16[IKE] received FRAGMENTATION vendor ID 16[ENC] generating ID_PROT request 0 [ KE No NAT-D NAT-D ] 16[NET] sending packet: from my.ip.xx[500] to their.ip.xx[500] (244 bytes) 15[IKE] sending retransmit 1 of request message ID 0, seq 2 15[NET] sending packet: from my.ip.xx[500] to their.ip.xx[500] (244 bytes) 02[NET] received packet: from their.ip.xx[500] to my.ip.xx[500] (68 bytes) 02[ENC] parsed INFORMATIONAL_V1 request 0 [ N(INVAL_IKE_SPI) ] 02[IKE] received INVALID_IKE_SPI error notify
Config is here