how to whitelist fail2ban code example
Example: fail2ban sshd regex
^%(__prefix_line)sConnection closed by authenticating user <F-USER>.+</F-USER> <HOST> port \d+ \[preauth\]$
^%(__prefix_line)sConnection closed by authenticating user <F-USER>.+</F-USER> <HOST> port \d+ \[preauth\]$