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FAIL2BAN - fail2ban-regex Manpage - Revision history
2026-05-02T18:44:00Z
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Admin at 16:03, 13 December 2025
2025-12-13T16:03:52Z
<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:03, 13 December 2025</td>
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Admin
https://it-arts.net/index.php?title=FAIL2BAN_-_fail2ban-regex_Manpage&diff=461&oldid=prev
Admin: Created page with "Category:Wiki == Quick Examples == <nowiki> fail2ban-regex -v /var/log/nginx/<VHOST>.access.log /etc/fail2ban/filter.d/<FILTER-NAME>.conf</nowiki> == fail2ban-regex Manpage == <noscript> FAIL2BAN-REGEX(1) User Commands FAIL2BAN-REGEX(1) NAME fail2ban-regex - test Fail2..."
2025-12-13T16:03:29Z
<p>Created page with "<a href="/index.php/Category:Wiki" title="Category:Wiki">Category:Wiki</a> == Quick Examples == <nowiki> fail2ban-regex -v /var/log/nginx/<VHOST>.access.log /etc/fail2ban/filter.d/<FILTER-NAME>.conf</nowiki> == fail2ban-regex Manpage == <noscript> FAIL2BAN-REGEX(1) User Commands FAIL2BAN-REGEX(1) NAME fail2ban-regex - test Fail2..."</p>
<p><b>New page</b></p><div>[[Category:Wiki]]<br />
<br />
== Quick Examples ==<br />
<br />
<nowiki><br />
fail2ban-regex -v /var/log/nginx/<VHOST>.access.log /etc/fail2ban/filter.d/<FILTER-NAME>.conf</nowiki><br />
<br />
== fail2ban-regex Manpage ==<br />
<br />
<noscript><br />
FAIL2BAN-REGEX(1) User Commands FAIL2BAN-REGEX(1)<br />
<br />
NAME<br />
fail2ban-regex - test Fail2ban "failregex" option<br />
<br />
SYNOPSIS<br />
fail2ban-regex [OPTIONS] <LOG> <REGEX> [IGNOREREGEX]<br />
<br />
DESCRIPTION<br />
Fail2Ban reads log file that contains password failure report and bans the corresponding IP addresses using firewall rules.<br />
<br />
This tools can test regular expressions for "fail2ban".<br />
<br />
LOG:<br />
string a string representing a log line<br />
<br />
filename<br />
path to a log file (/var/log/auth.log)<br />
<br />
systemd-journal<br />
search systemd journal (systemd-python required), optionally with backend parameters, see `man jail.conf` for usage and examples (systemd-journal[journalflags=1]).<br />
<br />
REGEX:<br />
string a string representing a 'failregex'<br />
<br />
filter name of filter, optionally with options (sshd[mode=aggressive])<br />
<br />
filename<br />
path to a filter file (filter.d/sshd.conf)<br />
<br />
IGNOREREGEX:<br />
string a string representing an 'ignoreregex'<br />
<br />
filename<br />
path to a filter file (filter.d/sshd.conf)<br />
<br />
OPTIONS<br />
--version<br />
show program's version number and exit<br />
<br />
-h, --help<br />
show this help message and exit<br />
<br />
-c CONFIG, --config=CONFIG<br />
set alternate config directory<br />
<br />
-d DATEPATTERN, --datepattern=DATEPATTERN<br />
set custom pattern used to match date/times<br />
<br />
--timezone=TIMEZONE, --TZ=TIMEZONE<br />
set time-zone used by convert time format<br />
<br />
-e ENCODING, --encoding=ENCODING<br />
File encoding. Default: system locale<br />
<br />
-r, --raw<br />
Raw hosts, don't resolve dns<br />
<br />
--usedns=USEDNS<br />
DNS specified replacement of tags <HOST> in regexp ('yes' - matches all form of hosts, 'no' - IP addresses only)<br />
<br />
-L MAXLINES, --maxlines=MAXLINES<br />
maxlines for multi-line regex.<br />
<br />
-m JOURNALMATCH, --journalmatch=JOURNALMATCH<br />
journalctl style matches overriding filter file. "systemd-journal" only<br />
<br />
-l LOG_LEVEL, --log-level=LOG_LEVEL<br />
Log level for the Fail2Ban logger to use<br />
<br />
-V get version in machine-readable short format<br />
<br />
-v, --verbose<br />
Increase verbosity<br />
<br />
--verbosity=VERBOSE<br />
Set numerical level of verbosity (0..4)<br />
<br />
--verbose-date, --VD<br />
Verbose date patterns/regex in output<br />
<br />
-D, --debuggex<br />
Produce debuggex.com urls for debugging there<br />
<br />
--no-check-all<br />
Disable check for all regex's<br />
<br />
-o OUT, --out=OUT<br />
Set token to print failure information only (row, id, ip, msg, host, ip4, ip6, dns, matches, ...)<br />
<br />
--print-no-missed<br />
Do not print any missed lines<br />
<br />
--print-no-ignored<br />
Do not print any ignored lines<br />
<br />
--print-all-matched<br />
Print all matched lines<br />
<br />
--print-all-missed<br />
Print all missed lines, no matter how many<br />
<br />
--print-all-ignored<br />
Print all ignored lines, no matter how many<br />
<br />
-t, --log-traceback<br />
Enrich log-messages with compressed tracebacks<br />
<br />
--full-traceback<br />
Either to make the tracebacks full, not compressed (as by default)<br />
<br />
AUTHOR<br />
Written by Cyril Jaquier <cyril.jaquier@fail2ban.org>. Many contributions by Yaroslav O. Halchenko, Steven Hiscocks, Sergey G. Brester (sebres).<br />
<br />
REPORTING BUGS<br />
Report bugs to https://github.com/fail2ban/fail2ban/issues<br />
<br />
COPYRIGHT<br />
Copyright © 2004-2008 Cyril Jaquier, 2008- Fail2Ban Contributors<br />
Copyright of modifications held by their respective authors. Licensed under the GNU General Public License v2 (GPL).<br />
<br />
SEE ALSO<br />
fail2ban-client(1) fail2ban-server(1) jail.conf(5)<br />
<br />
fail2ban-regex 1.1.0 April 2024 FAIL2BAN-REGEX(1)</noscript></div>
Admin