TLS Error

[gregeeh]

Hi all,

I have pfSense 2.4.3 with OpenVPN configured as both a Server and a Client. Both Server and Client are working correctly.

However I'm noting the following errors in the OpenVPN log:

Jun 5 08:28:40 	openvpn 	43102 	TLS Error: cannot locate HMAC in incoming packet from [AF_INET]181.215.195.234:47099
Jun 5 07:20:04 	openvpn 	43102 	TLS Error: cannot locate HMAC in incoming packet from [AF_INET]185.200.118.58:35062
Jun 4 18:50:53 	openvpn 	43102 	TLS Error: cannot locate HMAC in incoming packet from [AF_INET]185.200.118.49:44359
Jun 4 07:03:22 	openvpn 	43102 	TLS Error: cannot locate HMAC in incoming packet from [AF_INET]185.200.118.72:35633
Jun 3 18:49:25 	openvpn 	43102 	TLS Error: cannot locate HMAC in incoming packet from [AF_INET]185.200.118.50:44700
Jun 3 16:37:29 	openvpn 	5256 	Initialization Sequence Completed 

I don't know what is causing the error or whether it is client or server related.

Comments appreciated.

TIA

Greg

Edit: There is no connection to the Server at present.

[jimp]

Usually that means that some other client (not OpenVPN) hit the port. It might be a port scan, a monitoring probe, or a client that doesn't have the right TLS key for example.

[gregeeh]

@jimp said in TLS Error:

Usually that means that some other client (not OpenVPN) hit the port. It might be a port scan, a monitoring probe, or a client that doesn't have the right TLS key for example.

I think you are correct, as I just did a port scan, using one of the online tools, on port 1194 and the error appeared. Seems to confirm your thoughts.

Thanks.