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# Fail2Ban filter for the Proftpd FTP daemon## Set "UseReverseDNS off" in proftpd.conf to avoid the need for DNS.# See: http://www.proftpd.org/docs/howto/DNS.html# 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"[INCLUDES]before = common.conf[Definition]_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 \(\d+\) exceededignoreregex =[Init]journalmatch = _SYSTEMD_UNIT=proftpd.service# Author: Yaroslav Halchenko# Daniel Black - hardening of regex