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# Fail2Ban filter for the Proftpd FTP daemon
# Set "UseReverseDNS off" in proftpd.conf to avoid the need for DNS.
# See:
# When the default locale for your system is not en_US.UTF-8
# on Debian-based systems be sure to add this to /etc/default/proftpd
# export LC_TIME="en_US.UTF-8"
before = common.conf
_daemon = proftpd
__suffix_failed_login = ([uU]ser not authorized for login|[nN]o such user found|[iI]ncorrect password|[pP]assword expired|[aA]ccount disabled|[iI]nvalid shell: '\S+'|[uU]ser in \S+|[lL]imit (access|configuration) denies login|[nN]ot a UserAlias|[mM]aximum login length exceeded)
prefregex = ^%(__prefix_line)s%(__hostname)s \(\S+\[<HOST>\]\)[: -]+ <F-CONTENT>(?:USER|SECURITY|Maximum) .+</F-CONTENT>$
failregex = ^USER <F-USER>\S+|.*?</F-USER>(?: \(Login failed\))?: %(__suffix_failed_login)s
^SECURITY VIOLATION: <F-USER>\S+|.*?</F-USER> login attempted
^Maximum login attempts \(\d+\) exceeded
ignoreregex =
journalmatch = _SYSTEMD_UNIT=proftpd.service
# Author: Yaroslav Halchenko
# Daniel Black - hardening of regex