TLS error with OpenVPN client

GSpock

Senior Member
Hi all,
I just noticed some TLS errors in syslog file related to my openvpn client 2 ; there is only one device linked to this openvpn client and this a synology NAS. My other openvpn client do not report such errors ...
any ideas ?
Thx,
GS

Code:
Jul  5 18:04:35 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=26
Jul  5 18:24:20 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=17
Jul  5 18:27:55 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=1
Jul  5 18:46:12 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=14
Jul  5 19:51:05 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=24
Jul  5 20:09:57 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=30
Jul  5 21:02:42 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=15
Jul  5 21:12:20 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=21
Jul  6 00:33:01 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=14
Jul  6 03:38:16 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=23
Jul  6 03:38:57 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=24
Jul  6 03:58:28 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=22
Jul  6 04:00:51 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=17
Jul  6 04:01:20 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=13
Jul  6 04:02:45 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=20
Jul  6 04:05:45 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=20
Jul  6 04:19:14 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=25
Jul  6 04:23:03 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=23
Jul  6 04:24:29 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=25
Jul  6 04:26:21 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=27
Jul  6 04:26:51 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=13
Jul  6 04:28:46 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=15
Jul  6 04:33:10 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=16
Jul  6 04:34:38 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=18
Jul  6 04:35:34 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=17
Jul  6 04:39:26 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=17
Jul  6 04:40:26 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=23
Jul  6 04:42:50 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=31
Jul  6 04:46:35 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=27
Jul  6 04:47:18 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=29
Jul  6 04:49:39 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=27
Jul  6 04:51:48 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=15
Jul  6 05:04:55 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=19
Jul  6 05:31:05 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=30
Jul  6 07:04:47 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=17
Jul  6 07:24:29 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=28
Jul  6 07:26:55 ovpn-client2[9820]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxx op=0
 

GSpock

Senior Member
Additional errors ...
Code:
Jul  6 10:02:41 ovpn-client2[20541]: Authenticate/Decrypt packet error: packet HMAC authentication failed
Jul  6 10:02:41 ovpn-client2[20541]: TLS Error: incoming packet authentication failed from [AF_INET]185.xxx.xxx.xxx:xxxx
Jul  6 10:08:23 ovpn-client2[20541]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxxx op=24
Jul  6 10:10:02 ovpn-client2[20541]: TLS Error: Unroutable control packet received from [AF_INET]185.xxx.xxx.xxx:xxxx (si=3 op=P_CONTROL_SOFT_RESET_V1)
Jul  6 10:16:34 ovpn-client2[20541]: TLS Error: Unroutable control packet received from [AF_INET]185.xxx.xxx.xxx:xxxx (si=3 op=P_ACK_V1)
Jul  6 10:18:57 ovpn-client2[20541]: Peer tried unsupported key-method 1
Jul  6 10:18:57 ovpn-client2[20541]: TLS Error: unknown opcode received from [AF_INET]185.xxx.xxx.xxx:xxxx op=2
 

eibgrad

Part of the Furniture
Is the OpenVPN client working despite these errors? Do you have the Inbound Firwall option set to Block (the default)? Who is the VPN provider (in case they are known to produce such errors)?
 

GSpock

Senior Member
Is the OpenVPN client working despite these errors?
Yes
Do you have the Inbound Firwall option set to Block (the default)?
Yes
Who is the VPN provider (in case they are known to produce such errors)?

Torguard ; but I have 3 other vpnclient with them and only #2 is causing those error messages ....
 
Last edited:

eibgrad

Part of the Furniture
Not sure what the problem is, but perhaps it's just a misconfiguration w/ that specific server.
 

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