nginx-botsearch-main.conf

# setup /etc/fail2ban/filter.d/nginx-botsearch-main.conf
# fail2ban-regex "/var/log/nginx/*.access.log" /etc/fail2ban/filter.d/nginx-botsearch-main.conf --print-all-matched

# Fail2Ban filter to match web requests for selected URLs that don't exist
#

[INCLUDES]

# Load regexes for filtering
before = botsearch-common.conf

[Definition]

failregex = ^<HOST> \- \S+ \[\] \"(GET|POST|HEAD) \/<block> \S+\" 404 .+$
            ^ \[error\] \d+#\d+: \*\d+ (\S+ )?\"\S+\" (failed|is not found) \(2\: No such file or directory\), client\: <HOST>\, server\: \S*\, request: \"(GET|POST|HEAD) \/<block> \S+\"\, .*?$

ignoreregex = 

datepattern = {^LN-BEG}%%ExY(?P<_sep>[-/.])%%m(?P=_sep)%%d[T ]%%H:%%M:%%S(?:[.,]%%f)?(?:\s*%%z)?
              ^[^\[]*\[({DATE})
              {^LN-BEG}

# DEV Notes:
# Based on apache-botsearch filter
# 
# Author: Frantisek Sumsal