FAIL2BAN-REGEX(1) User Commands FAIL2BAN-REGEX(1)
NAME
fail2ban-regex - test Fail2ban "failregex" option
SYNOPSIS
fail2ban-regex [OPTIONS] <LOG> <REGEX> [IGNOREREGEX]
DESCRIPTION
Fail2Ban reads log file that contains password failure report and bans
the corresponding IP addresses using firewall rules.
This tools can test regular expressions for "fail2ban".
LOG:
string a string representing a log line
filename
path to a log file (/var/log/auth.log)
systemd-journal
search systemd journal (systemd-python required), optionally
with backend parameters, see `man jail.conf` for usage and exam-
ples (systemd-journal[journalflags=1]).
REGEX:
string a string representing a 'failregex'
filter name of filter, optionally with options (sshd[mode=aggressive])
filename
path to a filter file (filter.d/sshd.conf)
IGNOREREGEX:
string a string representing an 'ignoreregex'
filename
path to a filter file (filter.d/sshd.conf)
OPTIONS
--version
show program's version number and exit
-h, --help
show this help message and exit
-c CONFIG, --config=CONFIG
set alternate config directory
-d DATEPATTERN, --datepattern=DATEPATTERN
set custom pattern used to match date/times
--timezone=TIMEZONE, --TZ=TIMEZONE
set time-zone used by convert time format
-e ENCODING, --encoding=ENCODING
File encoding. Default: system locale
-r, --raw
Raw hosts, don't resolve dns
--usedns=USEDNS
DNS specified replacement of tags <HOST> in regexp ('yes' -
matches all form of hosts, 'no' - IP addresses only)
-L MAXLINES, --maxlines=MAXLINES
maxlines for multi-line regex.
-m JOURNALMATCH, --journalmatch=JOURNALMATCH
journalctl style matches overriding filter file. "systemd-jour-
nal" only
-l LOG_LEVEL, --log-level=LOG_LEVEL
Log level for the Fail2Ban logger to use
-V get version in machine-readable short format
-v, --verbose
Increase verbosity
--verbosity=VERBOSE
Set numerical level of verbosity (0..4)
--verbose-date, --VD
Verbose date patterns/regex in output
-D, --debuggex
Produce debuggex.com urls for debugging there
--no-check-all
Disable check for all regex's
-o OUT, --out=OUT
Set token to print failure information only (row, id, ip, msg,
host, ip4, ip6, dns, matches, ...)
--print-no-missed
Do not print any missed lines
--print-no-ignored
Do not print any ignored lines
--print-all-matched
Print all matched lines
--print-all-missed
Print all missed lines, no matter how many
--print-all-ignored
Print all ignored lines, no matter how many
-t, --log-traceback
Enrich log-messages with compressed tracebacks
--full-traceback
Either to make the tracebacks full, not compressed (as by
default)
AUTHOR
Written by Cyril Jaquier <cyril.jaquier AT fail2ban.org>. Many contribu-
tions by Yaroslav O. Halchenko, Steven Hiscocks, Sergey G. Brester
(sebres).
REPORTING BUGS
Report bugs to https://github.com/fail2ban/fail2ban/issues
COPYRIGHT
Copyright (C) 2004-2008 Cyril Jaquier, 2008- Fail2Ban Contributors
Copyright of modifications held by their respective authors. Licensed
under the GNU General Public License v2 (GPL).
SEE ALSO
fail2ban-client(1) fail2ban-server(1) jail.conf(5)
fail2ban-regex 1.1.0 April 2024 FAIL2BAN-REGEX(1)