OPNsense Forum

English Forums => Virtual private networks => Topic started by: grapes2331 on April 03, 2026, 04:39:54 AM

Title: openVPN randomly disconnecting
Post by: grapes2331 on April 03, 2026, 04:39:54 AM
Hello, my openVPN client keeps randomly disconnecting for now reason and i see `IP packet with unknown IP version=0 seen`. I selected MSS fix option within the instance config, but it still seems to happen. I am using the following certification I'm not sure if this is increasing my packet and I need to specify a different MTU.


TLS static key

Public Key Algorithm: Elliptic Curve Cryptography (ECC)

Key Size: 521-bit

Elliptic Curve: NIST P-521 (secp521r1)

Signature Algorithm: ECDSA (Elliptic Curve Digital Signature Algorithm) with SHA-512