IPsec Client is deleted.

[fun]

Hello there,

I am unable to connect vpn via iOS device and MacOS device.
The initial connection with new assigned public IP is working, however, it will not connecting with unknown reason.
The server logs showing that IPsec Client is deleted immediately after created.

2024-01-17 08:55:34.554 IPsec Client 96 (112.42.52.252:12679 -> 172.31.0.60:500): A new IPsec client is created.
2024-01-17 08:55:34.554 IPsec IKE Session (IKE SA) 71 (Client: 96) (112.42.52.252:12679 -> 172.31.0.60:500): A new IKE SA (Main Mode) is created. Initiator Cookie: 0x9C659858A2807471, Responder Cookie: 0x6DAAAE46257BEF2, DH Group: MODP 2048 (Group 14), Hash Algorithm: SHA-2-256, Cipher Algorithm: AES-CBC, Cipher Key Size: 256 bits, Lifetime: 4294967295 Kbytes or 3600 seconds
2024-01-17 08:55:34.831 IPsec Client 96 (112.42.52.252:12680 -> 172.31.0.60:4500): The port number information of this client is updated.
2024-01-17 08:55:34.831 IPsec Client 96 (112.42.52.252:12680 -> 172.31.0.60:4500):
2024-01-17 08:55:34.831 IPsec IKE Session (IKE SA) 71 (Client: 96) (112.42.52.252:12680 -> 172.31.0.60:4500): This IKE SA is established between the server and the client.
2024-01-17 08:55:44.845 IPsec Client 96 (112.42.52.252:12680 -> 172.31.0.60:4500): This IPsec Client is deleted.
2024-01-17 08:55:44.845 IPsec IKE Session (IKE SA) 71 (Client: 96) (112.42.52.252:12680 -> 172.31.0.60:4500): This IKE SA is deleted.
2024-01-17 08:55:56.459 IPsec Client 97 (112.42.52.252:12680 -> 172.31.0.60:4500): A new IPsec client is created.
2024-01-17 08:56:07.580 IPsec Client 97 (112.42.52.252:12680 -> 172.31.0.60:4500): This IPsec Client is deleted.
2024-01-17 08:56:10.573 Administration mode [RPC-78]: The log file on the server "ip-172-31-38-143.ap-northeast-2.compute.internal" (log file "server_log/vpn_20240117.log") has been downloaded.

Thanks in advance.
Regards,

[solo]

Check if your devices can connect to VPN Gate servers. If not, try SoftEther Developer Edition server.

[fun]

Check if your devices can connect to VPN Gate servers. If not, try SoftEther Developer Edition server.

Thanks Solo for your response.
Yes, I can connect via my device. The VPN connection is working at beginning of assign new Public Address.

[solo]

Well, since your devices work properly on VPN Gate, then you need to correct your server's setup.

[fun]

Well, since your devices work properly on VPN Gate, then you need to correct your server's setup.

For more information that I found after I connect vpn with L2TP on my MacBook Air M2(OS version:12.7.2), the issue will be happen.