L2TP server stops working after sometime

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Nooky
Posts: 1
Joined: Sun May 07, 2023 4:04 am

L2TP server stops working after sometime

Post by Nooky » Sun May 07, 2023 4:24 am

After the server is up for some time, usually 3 or 4 weeks, the L2TP server will stop working.
Simply restarting the vpnserver will make it work again. Also when L2TP server is down, the softether server is not affected, meaning I can still connect with vpnclient without any trouble.

Here is the log when L2TP server is down, but I guess there isn't much useful information in it:

Code: Select all

2023-05-07 09:31:29.916 IPsec Client 82 (<clientIp>:31190 -> 0.0.0.0:500): A new IPsec client is created.
2023-05-07 09:31:29.916 IPsec IKE Session (IKE SA) 72 (Client: 82) (<clientIp>:31190 -> 0.0.0.0:500): A new IKE SA (Main Mode) is created. Initiator Cookie: 0x8967AD65E503D5B2, Responder Cookie: 0xD4B7F8319BF8160D, 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
2023-05-07 09:31:30.138 IPsec Client 83 (<clientIp>:31191 -> 172.21.195.111:4500): A new IPsec client is created.
2023-05-07 09:31:40.040 IPsec IKE Session (IKE SA) 72 (Client: 82) (<clientIp>:31190 -> 0.0.0.0:500): This IKE SA is deleted.
2023-05-07 09:31:40.040 IPsec Client 82 (<clientIp>:31190 -> 0.0.0.0:500): This IPsec Client is deleted.
2023-05-07 09:31:40.282 IPsec Client 83 (<clientIp>:31191 -> 172.21.195.111:4500): This IPsec Client is deleted.
2023-05-07 09:31:52.181 IPsec Client 84 (<clientIp>:31191 -> 172.21.195.111:4500): A new IPsec client is created.
2023-05-07 09:32:03.296 IPsec Client 84 (<clientIp>:31191 -> 172.21.195.111:4500): This IPsec Client is deleted.
2023-05-07 09:32:11.202 IPsec Client 85 (<clientIp>:31190 -> 0.0.0.0:500): A new IPsec client is created.
2023-05-07 09:32:11.202 IPsec IKE Session (IKE SA) 73 (Client: 85) (<clientIp>:31190 -> 0.0.0.0:500): A new IKE SA (Main Mode) is created. Initiator Cookie: 0xF8E36BA14668162, Responder Cookie: 0x89173C31616934D0, 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
2023-05-07 09:32:11.404 IPsec Client 86 (<clientIp>:31191 -> 172.21.195.111:4500): A new IPsec client is created.
2023-05-07 09:32:21.300 IPsec Client 85 (<clientIp>:31190 -> 0.0.0.0:500): This IPsec Client is deleted.
2023-05-07 09:32:21.300 IPsec IKE Session (IKE SA) 73 (Client: 85) (<clientIp>:31190 -> 0.0.0.0:500): This IKE SA is deleted.
2023-05-07 09:32:21.532 IPsec Client 86 (<clientIp>:31191 -> 172.21.195.111:4500): This IPsec Client is deleted.
2023-05-07 09:32:33.322 IPsec Client 87 (<clientIp>:31191 -> 172.21.195.111:4500): A new IPsec client is created.
2023-05-07 09:32:44.447 IPsec Client 87 (<clientIp>:31191 -> 172.21.195.111:4500): This IPsec Client is deleted.
2023-05-07 09:33:14.781 IPsec Client 88 (<clientIp>:31190 -> 0.0.0.0:500): A new IPsec client is created.
2023-05-07 09:33:14.781 IPsec IKE Session (IKE SA) 74 (Client: 88) (<clientIp>:31190 -> 0.0.0.0:500): A new IKE SA (Main Mode) is created. Initiator Cookie: 0x755F5B18F1B95274, Responder Cookie: 0xC97D2C4C01B532E3, 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
2023-05-07 09:33:14.983 IPsec Client 89 (<clientIp>:31191 -> 172.21.195.111:4500): A new IPsec client is created.
2023-05-07 09:33:24.876 IPsec IKE Session (IKE SA) 74 (Client: 88) (<clientIp>:31190 -> 0.0.0.0:500): This IKE SA is deleted.
2023-05-07 09:33:24.876 IPsec Client 88 (<clientIp>:31190 -> 0.0.0.0:500): This IPsec Client is deleted.
2023-05-07 09:33:25.108 IPsec Client 89 (<clientIp>:31191 -> 172.21.195.111:4500): This IPsec Client is deleted.
2023-05-07 09:33:36.628 IPsec Client 90 (<clientIp>:31191 -> 172.21.195.111:4500): A new IPsec client is created.
2023-05-07 09:33:47.749 IPsec Client 90 (<clientIp>:31191 -> 172.21.195.111:4500): This IPsec Client is deleted.

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