L2TP VPN saved credentials connects...not saved disconnects

hinde

Our L2TP VPN connection connects when the user saves their user credentials through Windows VPN client.  If they don't have VPN credentials saved and wait for windows to prompt, by the time the user enters credentials the VPN has disconnected.  

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554	2022-10-07 13:18:57	info	IKE	ISAKMP SA [L2TP_VPN] is disconnected	63.	75.
555	2022-10-07 13:18:57	info	IKE	The cookie pair is : 0xed76869d33bd558c / 0xe6d9b44381593982	63.	75.
556	2022-10-07 13:18:57	info	IKE	Received delete notification	75.	63.
557	2022-10-07 13:18:57	info	IKE	Recv:[HASH][DEL] [count=2]	75.	63.
563	2022-10-07 13:18:43	info	IKE	Dynamic Tunnel [L2TP_VPN:L2TP_VPN:0xe8105df8] built successfully

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USG110

Firmware Version:V4.71

Any ideas?

Zyxel_James

Hello @hinde,

This problem didn't occur in my lab tests on V4.72. Whether the password is saved or not, the L2TP VPN is connected.

1. could you upgrade to V4.72 and try again?

2. if the problem still exists, please provide the complete log of the fail connection

3. If it's possible, you may provide remote access and VPN information to me through private message, I would like to test it, thank you.

James