fail2ban/config/filter.d/vsftpd.conf

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# Fail2Ban filter for vsftp
#
# Configure VSFTP for "dual_log_enable=YES", and have fail2ban watch
# /var/log/vsftpd.log instead of /var/log/secure. vsftpd.log file shows the
# incoming ip address rather than domain names.
[INCLUDES]
before = common.conf
[Definition]
__pam_re=(?:\(?%(__pam_auth)s(?:\(\S+\))?\)?:?\s+)?
_daemon = vsftpd
failregex = ^%(__prefix_line)s%(__pam_re)sauthentication failure; logname=<F-ALT_USER1>\S*</F-ALT_USER1> uid=\S* euid=\S* tty=(?:ftp)? ruser=<F-USER>\S*</F-USER> rhost=<HOST>(?:\s+user=<F-ALT_USER>\S*</F-ALT_USER>)?\s*$
^(?:\s*\[pid \d+\] |%(__prefix_line)s)\[<F-USER>[^\]]+</F-USER>\] FAIL LOGIN: Client "<HOST>"(?:\s*$|,)
ignoreregex =
# Authors: Cyril Jaquier, Lucian Maly <lmaly@redhat.com>
# Documentation from fail2ban wiki