…a substitute, created via experimentation with RegExr: failregex = .*auth.*pam.*dovecot.*(?:authentication failure).*rhost=<HOST>.* How to create a valid RegEx to match the failures to ban? For that, one must monitor log files.… (Search hits: 2 in body, 0 in title, 0 in categories, 0 in tags, 0 in other taxonomies, 0 in comments. Score: 37.69)


