I’ve RB750GL on which I configured OVPN server. When I tested everything working fine, I took a backup and reset my router for some other testings. When I restored backup and try to connect VPN, it is giving TLS error.
Sun Jul 16 18:57:05 2023 us=423092 TLS: Initial packet from [AF_INET]xx.xx.xx.xx:1194, sid=838dc0cc 213d9ec0
Sun Jul 16 18:57:06 2023 us=656988 VERIFY OK: depth=1, CN=CA
Sun Jul 16 18:57:06 2023 us=667765 VERIFY KU OK
Sun Jul 16 18:57:06 2023 us=667765 Validating certificate extended key usage
Sun Jul 16 18:57:06 2023 us=667765 ++ Certificate has EKU (str) TLS Web Server Authentication, expects TLS Web Server Authentication
Sun Jul 16 18:57:06 2023 us=667765 VERIFY EKU OK
Sun Jul 16 18:57:06 2023 us=667765 VERIFY OK: depth=0, CN=Server
Sun Jul 16 18:57:06 2023 us=680745 OpenSSL: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca
Sun Jul 16 18:57:06 2023 us=680745 TLS_ERROR: BIO read tls_read_plaintext error
Sun Jul 16 18:57:06 2023 us=680745 TLS Error: TLS object → incoming plaintext read error
Sun Jul 16 18:57:06 2023 us=680745 TLS Error: TLS handshake failed
Sun Jul 16 18:57:06 2023 us=680745 TCP/UDP: Closing socket
Sun Jul 16 18:57:06 2023 us=680745 SIGUSR1[soft,tls-error] received, process restarting
Sun Jul 16 18:57:06 2023 us=680745 MANAGEMENT: >STATE:1689515826,RECONNECTING,tls-error,
Sun Jul 16 18:57:06 2023 us=680745 Restart pause, 5 second(s)