The Patch works also on our production system with 100 users. So I can confirm, that the patch solve the problem on systems with Auth via Password + TOTP + Client Cert. Thanks to @AdSchellevis!
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Show posts Menu2023-03-11T01:52:15+01:00 firewall.name.local openvpn 19578 - [meta sequenceId="44"] user 'username' could not authenticate.
2023-03-11T01:52:15+01:00 firewall.name.local openvpn_server1 66835 - [meta sequenceId="45"] xx.xx.216.156:60711 WARNING: Failed running command (--auth-user-pass-verify): external program exited with error status: 1
2023-03-11T01:52:15+01:00 firewall.name.local openvpn_server1 66835 - [meta sequenceId="46"] xx.xx.216.156:60711 TLS Auth Error: Auth Username/Password verification failed for peer
2023-03-11T01:52:15+01:00 firewall.name.local openvpn_server1 66835 - [meta sequenceId="47"] xx.xx.216.156:60711 [username] Peer Connection Initiated with [AF_INET]xx.xx.216.156:60711