Updated on 2026-05-14 GMT+08:00
Client Connection Failures
- The Client Log Contains "Connection failed to establish within given time"
- The Client Log Contains "Cannot load CA certificate file [[INLINE]](no entries were read)"
- The Client Log Contains "error:068000A8:asn1 encoding routines:wrong tag"
- The Client Log Contains "OpenSSL: error:0A000086:SSL routines::certificate verify failed"
- The Client Log Contains "TLS Error: TLS handshake failed"
- The Client Log Contains "Options error: Unrecognized option or missing or extra parameter(s) in XXX: disable-dco"
- The Client Log Contains "TCP: connect to [AF_INET] *.*.*.*:**** failed: Unknown error"
- The Client Log Contains "AUTH: Received control message: AUTH_FAILED"
- The Client Log Contains "AUTH_FAILED"
- The Client Log Contains "error=unable to get issuer certificate:".
- The Client Log Contains "peer Certificate Verification Failure"
- The Client Log Contains "error=path length constraint exceeded"
- The Client Log Contains "Certificate does not have key usage extension"
- The Client Log Contains "Error message: ovpnagent:request error"
- The Client Log Contains "X509::parse_pem: error in cert::error:0480006C:PEM routines::no start line"
- The Client Log Contains "certReadError"
- The Client Log Contains "OPTIONS ERROR:failed to negotiate cipher with server.Add the server's cipher('AES-XXX-GCM') to --data-ciphers(currently 'AES-XXX-GCM') if you want to connect to this server."
- The Client Log Contains "Session invalidated: DECRYPT_ERROR"
- The Client Log Contains "Unrecognized option or missing or extra parameter(s) in xxx.ovpn:108: data-ciphers (2.4.12)"
- When a User Uses Federated Authentication to Log in to the Client, the Browser Displays the Error Message "The user does not have the vpn:system:loginP2cVpnBySSO permission. Contact the administrator to add the permission."
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