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ChangeLog
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__ _ _ ___ _
/ _|__ _(_) |_ ) |__ __ _ _ _
| _/ _` | | |/ /| '_ \/ _` | ' \
|_| \__,_|_|_/___|_.__/\__,_|_||_|
Fail2Ban: Changelog
===================
ver. 0.10.0 (2016/XX/XXX) - gonna-be-released-some-time-shining
-----------
TODO: implementing of options resp. other tasks from PR #1346
documentation should be extended (new options, etc)
### Fixes
* `filter.d/pam-generic.conf`:
- [grave] injection on user name to host fixed
* `filter.d/sshd.conf`:
- rewritten using `prefregex` and used MLFID-related multi-line parsing
(by using tag `<F-MLFID>` instead of buffering with `maxlines`);
- optional parameter `mode` rewritten: normal (default), ddos, extra or aggressive (combines all),
see sshd for regex details)
* filter.d/sendmail-reject.conf:
- rewritten using `prefregex` and used MLFID-related multi-line parsing;
- optional parameter `mode` introduced: normal (default), extra or aggressive
* `action.d/complain.conf`
- fixed using new tag `<ip-rev>` (sh/dash compliant now)
* `action.d/sendmail-geoip-lines.conf`
- fixed using new tag `<ip-host>` (without external command execution)
* fail2ban-regex: fixed matched output by multi-line (buffered) parsing
* fail2ban-regex: support for multi-line debuggex URL implemented (gh-422)
* fixed ipv6-action errors on systems not supporting ipv6 und umgekehrt (gh-1741)
### New Features
* New Actions:
* New Filters:
### Enhancements
* Introduced new filter option `prefregex` for pre-filtering using single regular expression (gh-1698);
* Many times faster and fewer CPU-hungry because of parsing with `maxlines=1`, so without
line buffering (scrolling of the buffer-window).
Combination of tags `<F-MLFID>` and `<F-NOFAIL>` can be used now to process multi-line logs
using single-line expressions:
- tag `<F-MLFID>`: used to identify resp. store failure info for groups of log-lines with the same
identifier (e. g. combined failure-info for the same conn-id by `<F-MLFID>(?:conn-id)</F-MLFID>`,
see sshd.conf for example);
- tag `<F-MLFFORGET>`: can be used as mark to forget current multi-line MLFID (e. g. by connection
closed, reset or disconnect etc);
- tag `<F-NOFAIL>`: used as mark for no-failure (helper to accumulate common failure-info,
e. g. from lines that contain IP-address);
Opposite to obsolete multi-line parsing (using buffering with `maxlines`) it is more precise and
can recognize multiple failure attempts within the same connection (MLFID).
* Several filters optimized with pre-filtering using new option `prefregex`, and multiline filter
using `<F-MLFID>` + `<F-NOFAIL>` combination;
* Exposes filter group captures in actions (non-recursive interpolation of tags `<F-...>`,
see gh-1698, gh-1110)
* Some filters extended with user name (can be used in gh-1243 to distinguish IP and user,
resp. to remove after success login the user-related failures only);
* Safer, more stable and faster replaceTag interpolation (switched from cycle over all tags
to re.sub with callable)
* substituteRecursiveTags optimization + moved in helpers facilities (because currently used
commonly in server and in client)
* New tags (usable in actions):
- `<fid>` - failure identifier (if raw resp. failures without IP address)
- `<ip-rev>` - PTR reversed representation of IP address
- `<ip-host>` - host name of the IP address
- `<F-...>` - interpolates to the corresponding filter group capture `...`
* Allow to use filter options by `fail2ban-regex`, example:
fail2ban-regex text.log "sshd[mode=aggressive]"
* Samples test case factory extended with filter options - dict in JSON to control
filter options (e. g. mode, etc.):
# filterOptions: {"mode": "aggressive"}
* Introduced new jail option "ignoreself", specifies whether the local resp. own IP addresses
should be ignored (default is true). Fail2ban will not ban a host which matches such addresses.
Option "ignoreip" affects additionally to "ignoreself" and don't need to include the DNS
resp. IPs of the host self.
* Regex will be compiled as MULTILINE only if needed (buffering with `maxlines` > 1), that enables:
- to improve performance by the single line parsing (see gh-1733);
- make regex more precise (because distinguish between anchors `^`/`$` for the begin/end of string
and the new-line character '\n', e. g. if coming from filters (like systemd journal) that allow
the parsing of log-entries contain new-line chars (as single entry);
- if multiline regex however expected (by single-line parsing without buffering) - prefix `(?m)`
could be used in regex to enable it;
* implemented execution of `actionstart` on demand (conditional), if action depends on `family` (gh-1742):
- new action parameter `actionstart_on_demand` (bool) can be set to prevent/allow starting action
on demand (default retrieved automatically, if some conditional parameter `param?family=...`
presents in action properties), see `action.d/pf.conf` for example;
- additionally `actionstop` will be executed only for families previously executing `actionstart`
(starting on demand only)
* introduced new command `actionflush`: executed in order to flush all bans at once
e. g. by unban all, reload with removing action, stop, shutdown the system (gh-1743),
the actions having `actionflush` do not execute `actionunban` for each single ticket
* add new command `actionflush` default for several iptables/iptables-ipset actions (and common include);
ver. 0.10.0-alpha-1 (2016/07/14) - ipv6-support-etc
-----------
### Fixes
* [Grave] memory leak's fixed (gh-1277, gh-1234)
* [Grave] Misleading date patterns defined more precisely (using extended syntax
`%Ex[mdHMS]` for exact two-digit match or e. g. `%ExY` as more precise year
pattern, within same century of last year and the next 3 years)
* [Grave] extends date detector template with distance (position of match in
log-line), to prevent grave collision using (re)ordered template list (e.g.
find-spot of wrong date-match inside foreign input, misleading date patterns
by ambiguous formats, etc.)
* Distance collision check always prefers template with shortest distance
(left for right) if date pattern is not anchored
* Tricky bug fix: last position of log file will be never retrieved (gh-795),
because of CASCADE all log entries will be deleted from logs table together with jail,
if used "INSERT OR REPLACE" statement
* Asyncserver (asyncore) code fixed and test cases repaired (again gh-161)
* testSocket: sporadical bug repaired - wait for server thread starts a socket (listener)
* testExecuteTimeoutWithNastyChildren: sporadical bug repaired - wait for pid file inside bash,
kill tree in any case (gh-1155)
* Fixed high-load of pyinotify-backend,
see https://github.com/fail2ban/fail2ban/issues/885#issuecomment-248964591
* Database: stability fix - repack cursor iterator as long as locked
* File filter backends: stability fix for sporadically errors - always close file
handle, otherwise may be locked (prevent log-rotate, etc.)
* Pyinotify-backend: stability fix for sporadically errors in multi-threaded
environment (without lock)
* Fixed sporadically error in testCymruInfoNxdomain, because of unsorted values
* Misleading errors logged from ignorecommand in success case on retcode 1 (gh-1194)
* fail2ban.service - systemd service updated (gh-1618):
- starting service in normal mode (without forking)
- does not restart if service exited normally (exit-code 0, e.g. stopped via fail2ban-client)
- does not restart if service can not start (exit-code 255, e.g. wrong configuration, etc.)
- service can be additionally started/stopped with commands (fail2ban-client, fail2ban-server)
- automatically creates `/var/run/fail2ban` directory before start fail2ban
(systems with virtual resp. memory-based FS for `/var/run`), see gh-1531
- if fail2ban running as systemd-service, for logging to the systemd-journal,
the `logtarget` could be set to STDOUT
- value `logtarget` for system targets allowed also in lowercase (stdout, stderr, syslog, etc.)
* Fixed UTC/GMT named time zone, using `%Z` and `%z` patterns
(special case with 0 zone offset, see gh-1575)
* `filter.d/freeswitch.conf`
- Optional prefixes (server, daemon, dual time) if systemd daemon logs used (gh-1548)
- User part rewritten to accept IPv6 resp. domain after "@" (gh-1548)
### New Features
* IPv6 support:
- IP addresses are now handled as objects rather than strings capable for
handling both address types IPv4 and IPv6
- iptables related actions have been amended to support IPv6 specific actions
additionally
- hostsdeny and route actions have been tested to be aware of v4 and v6 already
- pf action for *BSD systems has been improved and supports now also v4 and v6
- name resolution is now working for either address type
- new conditional section functionality used in config resp. includes:
- [Init?family=inet4] - IPv4 qualified hosts only
- [Init?family=inet6] - IPv6 qualified hosts only
* New reload functionality (now totally without restart, unbanning/rebanning, etc.),
see gh-1557
* Several commands extended and new commands introduced:
- `restart [--unban] [--if-exists] <JAIL>` - restarts the jail \<JAIL\>
(alias for `reload --restart ... <JAIL>`)
- `reload [--restart] [--unban] [--all]` - reloads the configuration without restarting
of the server, the option `--restart` activates completely restarting of affected jails,
thereby can unban IP addresses (if option `--unban` specified)
- `reload [--restart] [--unban] [--if-exists] <JAIL>` - reloads the jail \<JAIL\>,
or restarts it (if option `--restart` specified), at the same time unbans all IP addresses
banned in this jail, if option `--unban` specified
- `unban --all` - unbans all IP addresses (in all jails and database)
- `unban <IP> ... <IP>` - unbans \<IP\> (in all jails and database) (see gh-1388)
- introduced new option `-t` or `--test` to test configuration resp. start server only
if configuration is clean (fails by wrong configured jails if option `-t` specified)
* New command action parameter `actionrepair` - command executed in order to restore
sane environment in error case of `actioncheck`.
* Reporting via abuseipdb.com:
- Bans can now be reported to abuseipdb
- Catagories must be set in the config
- Relevant log lines included in report
### Enhancements
* Huge increasing of fail2ban performance and especially test-cases performance (see gh-1109)
* Datedetector: in-place reordering using hits and last used time:
matchTime, template list etc. rewritten because of performance degradation
* Prevent out of memory situation if many IP's makes extremely many failures (maxEntries)
* Introduced string to seconds (str2seconds) for configuration entries with time,
use `1h` instead of `3600`, `1d` instead of `86400`, etc
* seekToTime - prevent completely read of big files first time (after start of service),
initial seek to start time using half-interval search algorithm (see issue gh-795)
* Ticket and some other modules prepared to easy merge with newest version of 'ban-time-incr'
* Cache dnsToIp, ipToName to prevent long wait during retrieving of ip/name,
especially for wrong dns or lazy dns-system
* FailManager memory-optimization: increases performance,
prevents memory leakage, because don't copy failures list on some operations
* fail2ban-testcases - new options introduced:
- `-f`, `--fast` to decrease wait intervals, avoid passive waiting, and skip
few very slow test cases (implied memory database, see `-m` and no gamin tests `-g`)
- `-g`, `--no-gamin` to prevent running of tests that require the gamin (slow)
- `-m`, `--memory-db` - run database tests using memory instead of file
- `-i`, `--ignore` - negate [regexps] filter to ignore tests matched specified regexps
* Background servicing: prevents memory leak on some platforms/python versions, using forced GC
in periodic intervals (latency and threshold)
* executeCmd partially moved from action to new module utils
* Several functionality of class `DNSUtils` moved to new class `IPAddr`,
both classes moved to new module `ipdns`
* Pseudo-conditional section introduced, for conditional substitution resp.
evaluation of parameters for different family qualified hosts,
syntax `[Section?family=inet6]` (currently use for IPv6-support only).
* All the backends were rewritten to get reload-possibility, performance increased,
so fewer greedy regarding cpu- resp. system-load now
* Numeric log-level allowed now in server (resp. fail2ban.conf);
* Implemented better error handling in some multi-threaded routines; shutdown of jails
rewritten (faster and safer, does not breaks shutdown process if some error occurred)
* Possibility for overwriting some configuration options (read with config-readers)
with command line option, e. g.:
```bash
## start server with DEBUG log-level (ignore level read from fail2ban.conf):
fail2ban-client --loglevel DEBUG start
## or
fail2ban-server -c /cfg/path --loglevel DEBUG start
## keep server log-level by reload (without restart it)
fail2ban-client --loglevel DEBUG reload
## switch log-level back to INFO:
fail2ban-client set loglevel INFO
```
* Optimized BanManager: increase performance, fewer system load, try to prevent
memory leakage:
- better ban/unban handling within actions (e.g. used dict instead of list)
- don't copy bans resp. its list on some operations;
- added new unbantime handling to relieve unBanList (prevent permanent
searching for tickets to unban)
- prefer failure-ID as identifier of the ticket to its IP (most of the time
the same, but it can be something else e.g. user name in some complex jails,
as introduced in 0.10)
* Regexp enhancements:
- build replacement of `<HOST>` substitution corresponding parameter
`usedns` - dns-part will be added only if `usedns` is not `no`,
also using fail2ban-regex
- new replacement for `<ADDR>` in opposition to `<HOST>`, for separate
usage of 2 address groups only (regardless of `usedns`), `ip4` and `ip6`
together, without host (dns)
* Misconfigured jails don't prevent fail2ban from starting, server starts
nevertheless, as long as one jail was successful configured (gh-1619)
Message about wrong jail configuration logged in client log (stdout, systemd
journal etc.) and in server log with error level
* More precise date template handling (WARNING: theoretically possible incompatibilities):
- datedetector rewritten more strict as earlier;
- default templates can be specified exacter using prefix/suffix syntax (via `datepattern`);
- more as one date pattern can be specified using option `datepattern` now
(new-line separated);
- some default options like `datepattern` can be specified directly in
section `[Definition]`, that avoids contrary usage of unnecessarily `[Init]`
section, because of performance (each extra section costs time);
- option `datepattern` can be specified in jail also (e. g. jails without filters
or custom log-format, new-line separated for multiple patterns);
- if first unnamed group specified in pattern, only this will be cut out from
search log-line (e. g.: `^date:[({DATE})]` will cut out only datetime match
pattern, and leaves `date:[] ...` for searching in filter);
- faster match and fewer searching of appropriate templates
(DateDetector.matchTime calls rarer DateTemplate.matchDate now);
- several standard filters extended with exact prefixed or anchored date templates;
* Added possibility to recognize restored state of the tickets (see gh-1669).
New option `norestored` introduced, to ignore restored tickets (after restart).
To avoid execution of ban/unban for the restored tickets, `norestored = true`
could be added in definition section of action.
For conditional usage in the shell-based actions an interpolation `<restored>`
could be used also. E. g. it is enough to add following script-piece at begin
of `actionban` (or `actionunban`) to prevent execution:
`if [ '<restored>' = '1' ]; then exit 0; fi;`
Several actions extended now using `norestored` option:
- complain.conf
- dshield.conf
- mail-buffered.conf
- mail-whois-lines.conf
- mail-whois.conf
- mail.conf
- sendmail-buffered.conf
- sendmail-geoip-lines.conf
- sendmail-whois-ipjailmatches.conf
- sendmail-whois-ipmatches.conf
- sendmail-whois-lines.conf
- sendmail-whois-matches.conf
- sendmail-whois.conf
- sendmail.conf
- smtp.py
- xarf-login-attack.conf
* fail2ban-testcases:
- `assertLogged` extended with parameter wait (to wait up to specified timeout,
before we throw assert exception) + test cases rewritten using that
- added `assertDictEqual` for compatibility to early python versions (< 2.7);
- new `with_foreground_server_thread` decorator to test several client/server commands
ver. 0.9.x (2016/??/??) - wanna-be-released
-----------
0.9.x line is no longer heavily developed. If you are interested in
new features (e.g. IPv6 support), please consider 0.10 branch and its
releases.
### Fixes
* Fixed a systemd-journal handling in fail2ban-regex (gh-1657)
* filter.d/sshd.conf
- Fixed non-anchored part of failregex (misleading match of colon inside
IPv6 address instead of `: ` in the reason-part by missing space, gh-1658)
(0.10th resp. IPv6 relevant only, amend for gh-1479)
* config/pathes-freebsd.conf
- Fixed filenames for apache and nginx log files (gh-1667)
* filter.d/sshd.conf
- new aggressive rules (gh-864):
- Connection reset by peer (multi-line rule during authorization process)
- No supported authentication methods available
- single line and multi-line expression optimized, added optional prefixes
and suffix (logged from several ssh versions), according to gh-1206;
- fixed expression received disconnect auth fail (optional space after port
part, gh-1652)
and suffix (logged from several ssh versions), according to gh-1206;
* filter.d/suhosin.conf
- greedy catch-all before `<HOST>` fixed (potential vulnerability)
* filter.d/cyrus-imap.conf
- accept entries without login-info resp. hostname before IP address (gh-1707)
* Filter tests extended with check of all config-regexp, that contains greedy catch-all
before `<HOST>`, that is hard-anchored at end or precise sub expression after `<HOST>`
### New Features
* New Actions:
- action.d/netscaler: Block IPs on a Citrix Netscaler ADC (gh-1663)
* New Filters:
- filter.d/domino-smtp: IBM Domino SMTP task (gh-1603)
### Enhancements
* Introduced new log-level `MSG` (as INFO-2, equivalent to 18)
ver. 0.9.6 (2016/12/10) - stretch-is-coming
-----------
### Fixes
* Misleading add resp. enable of (already available) jail in database, that
induced a subsequent error: last position of log file will be never retrieved (gh-795)
* Fixed a distribution related bug within testReadStockJailConfForceEnabled
(e.g. test-cases faults on Fedora, see gh-1353)
* Fixed pythonic filters and test scripts (running via wrong python version,
uses "fail2ban-python" now);
* Fixed test case "testSetupInstallRoot" for not default python version (also
using direct call, out of virtualenv);
* Fixed ambiguous wrong recognized date pattern resp. its optional parts (see gh-1512);
* FIPS compliant, use sha1 instead of md5 if it not allowed (see gh-1540)
* Monit config: scripting is not supported in path (gh-1556)
* `filter.d/apache-modsecurity.conf`
- Fixed for newer version (one space, gh-1626), optimized: non-greedy catch-all
replaced for safer match, unneeded catch-all anchoring removed, non-capturing
* `filter.d/asterisk.conf`
- Fixed to match different asterisk log prefix (source file: method:)
* `filter.d/dovecot.conf`
- Fixed failregex ignores failures through some not relevant info (gh-1623)
* `filter.d/ignorecommands/apache-fakegooglebot`
- Fixed error within apache-fakegooglebot, that will be called
with wrong python version (gh-1506)
* `filter.d/assp.conf`
- Extended failregex and test cases to handle ASSP V1 and V2 (gh-1494)
* `filter.d/postfix-sasl.conf`
- Allow for having no trailing space after 'failed:' (gh-1497)
* `filter.d/vsftpd.conf`
- Optional reason part in message after FAIL LOGIN (gh-1543)
* `filter.d/sendmail-reject.conf`
- removed mandatory double space (if dns-host available, gh-1579)
* filter.d/sshd.conf
- recognized "Failed publickey for" (gh-1477);
- optimized failregex to match all of "Failed any-method for ... from <HOST>" (gh-1479)
- eliminated possible complex injections (on user-name resp. auth-info, see gh-1479)
- optional port part after host (see gh-1533, gh-1581)
### New Features
* New Actions:
- `action.d/npf.conf` for NPF, the latest packet filter for NetBSD
* New Filters:
- `filter.d/mongodb-auth.conf` for MongoDB (document-oriented NoSQL database engine)
(gh-1586, gh-1606 and gh-1607)
### Enhancements
* DateTemplate regexp extended with the word-end boundary, additionally to
word-start boundary
* Introduces new command "fail2ban-python", as automatically created symlink to
python executable, where fail2ban currently installed (resp. its modules are located):
- allows to use the same version, fail2ban currently running, e.g. in
external scripts just via replace python with fail2ban-python:
```diff
-#!/usr/bin/env python
+#!/usr/bin/env fail2ban-python
```
- always the same pickle protocol
- the same (and also guaranteed available) fail2ban modules
- simplified stand-alone install, resp. stand-alone installation possibility
via setup (like gh-1487) is getting closer
* Several test cases rewritten using new methods assertIn, assertNotIn
* New forward compatibility method assertRaisesRegexp (normally python >= 2.7).
Methods assertIn, assertNotIn, assertRaisesRegexp, assertLogged, assertNotLogged
are test covered now
* Jail configuration extended with new syntax to pass options to the backend (see gh-1408),
examples:
- `backend = systemd[journalpath=/run/log/journal/machine-1]`
- `backend = systemd[journalfiles="/run/log/journal/machine-1/system.journal, /run/log/journal/machine-1/user.journal"]`
- `backend = systemd[journalflags=2]`
ver. 0.9.5 (2016/07/15) - old-not-obsolete
-----------
### Fixes
* `filter.d/monit.conf`
- Extended failregex with new monit "access denied" version (gh-1355)
- failregex of previous monit version merged as single expression
* `filter.d/postfix.conf`, `filter.d/postfix-sasl.conf`
- Extended failregex daemon part, matching also `postfix/smtps/smtpd`
now (gh-1391)
* Fixed a grave bug within tags substitutions because of incorrect
detection of recursion in case of multiple inline substitutions
of the same tag (affected actions: `bsd-ipfw`, etc). Now tracks
the actual list of the already substituted tags (per tag instead
of single list)
* `filter.d/common.conf`
- Unexpected extra regex-space in generic `__prefix_line` (gh-1405)
- All optional spaces normalized in `common.conf`, test covered now
- Generic `__prefix_line` extended with optional brackets for the
date ambit (gh-1421), added new parameter `__date_ambit`
* `gentoo-initd` fixed `--pidfile` bug: `--pidfile` is option of
`start-stop-daemon`, not argument of fail2ban (see gh-1434)
* `filter.d/asterisk.conf`
- Fixed security log support for PJSIP and Asterisk 13+ (gh-1456)
- Improved log support for PJSIP and Asterisk 13+ with different
callID (gh-1458)
### New Features
* New Actions:
- `action.d/firewallcmd-rich-rules` and `action.d/firewallcmd-rich-logging`
(gh-1367)
* New filters:
- slapd - ban hosts, that were failed to connect with invalid
credentials: error code 49 (gh-1478)
### Enhancements
* Extreme speedup of all sqlite database operations (gh-1436),
by using of following sqlite options:
- (synchronous = OFF) write data through OS without syncing
- (journal_mode = MEMORY) use memory for the transaction logging
- (temp_store = MEMORY) temporary tables and indices are kept in memory
* journald journalmatch for pure-ftpd (gh-1362)
* Added additional regex filter for dovecot ldap authentication failures (gh-1370)
* `filter.d/exim*conf`
- Added additional regexes (gh-1371)
- Made port entry optional
ver. 0.9.4 (2016/03/08) - for-you-ladies
-----------
### Fixes
* `roundcube-auth` jail typo for logpath
* Fix dnsToIp resolver for fqdn with large list of IPs (gh-1164)
* `filter.d/apache-badbots.conf`
- Updated useragent string regex adding escape for `+`
* `filter.d/mysqld-auth.conf`
- Updated "Access denied ..." regex for MySQL 5.6 and later (gh-1211, gh-1332)
* `filter.d/sshd.conf`
- Updated "Auth fail" regex for OpenSSH 5.9 and later
* Treat failed and killed execution of commands identically (only
different log messages), which addresses different behavior on different
exit codes of dash and bash (gh-1155)
* Fix jail.conf.5 man's section (gh-1226)
* Fixed default banaction for allports jails like pam-generic, recidive, etc
with new default variable `banaction_allports` (gh-1216)
* Fixed `fail2ban-regex` stops working on invalid (wrong encoded) character
for python version < 3.x (gh-1248)
* Use postfix_log logpath for postfix-rbl jail
* `filters.d/postfix.conf` - add 'Sender address rejected: Domain not found' failregex
* use `fail2ban_agent` as user-agent in actions badips, blocklist_de, etc (gh-1271)
* Fix ignoring the sender option by action_mw, action_mwl and action_c_mwl
* Changed `filter.d/asterisk` regex for "Call from ..." (few vulnerable now)
* Removed compression and rotation count from logrotate (inherit them from
the global logrotate config)
### New Features
* New interpolation feature for definition config readers - `<known/parameter>`
(means last known init definition of filters or actions with name `parameter`).
This interpolation makes possible to extend a parameters of stock filter or
action directly in jail inside jail.local file, without creating a separately
`filter.d/*.local` file.
As extension to interpolation `%(known/parameter)s`, that does not works for
filter and action init parameters
* New actions:
- `nftables-multiport` and `nftables-allports` - filtering using nftables
framework. Note: it requires a pre-existing chain for the filtering rule.
* New filters:
- `openhab` - domotic software authentication failure with the
rest api and web interface (gh-1223)
- `nginx-limit-req` - ban hosts, that were failed through nginx by limit
request processing rate (ngx_http_limit_req_module)
- `murmur` - ban hosts that repeatedly attempt to connect to
murmur/mumble-server with an invalid server password or certificate.
- `haproxy-http-auth` - filter to match failed HTTP Authentications against a
HAProxy server
* New jails:
- `murmur` - bans TCP and UDP from the bad host on the default murmur port.
* `sshd` filter got new failregex to match "maximum authentication
attempts exceeded" (introduced in openssh 6.8)
* Added filter for Mac OS screen sharing (VNC) daemon
### Enhancements
* Do not rotate empty log files
* Added new date pattern with year after day (e.g. `Sun Jan 23 2005 21:59:59`)
http://bugs.debian.org/798923
* Added openSUSE path configuration (Thanks Johannes Weberhofer)
* Allow to split ignoreip entries by ',' as well as by ' ' (gh-1197)
* Added a timeout (3 sec) to urlopen within badips.py action
(Thanks M. Maraun)
* Added check against atacker's Googlebot PTR fake records
(Thanks Pablo Rodriguez Fernandez)
* Enhance filter against atacker's Googlebot PTR fake records
(gh-1226)
* Nginx log paths extended (prefixed with "*" wildcard) (gh-1237)
* Added filter for openhab domotic software authentication failure with the
rest api and web interface (gh-1223)
* Add `*_backend` options for services to allow distros to set the default
backend per service, set default to systemd for Fedora as appropriate
* Performance improvements while monitoring large number of files (gh-1265).
Use associative array (dict) for monitored log files to speed up lookup
operations. Thanks @kshetragia
* Specified that fail2ban is PartOf iptables.service `firewalld.service` in
`.service` file -- would reload fail2ban if those services are restarted
* Provides new default `fail2ban_version` and interpolation variable
`fail2ban_agent` in jail.conf
* Enhance filter 'postfix' to ban incoming SMTP client with no fqdn hostname,
and to support multiple instances of postfix having varying suffix (gh-1331)
(Thanks Tom Hendrikx)
* `files/gentoo-initd` to use `start-stop-daemon` to robustify restarting the service
ver. 0.9.3 (2015/08/01) - lets-all-stay-friends
----------
### IMPORTANT incompatible changes
* `filter.d/roundcube-auth.conf`
- Changed logpath to 'errors' log (was 'userlogins')
* `action.d/iptables-common.conf`
- All calls to iptables command now use -w switch introduced in
iptables 1.4.20 (some distribution could have patched their
earlier base version as well) to provide this locking mechanism
useful under heavy load to avoid contesting on iptables calls.
If you need to disable, define `action.d/iptables-common.local`
with empty value for 'lockingopt' in `[Init]` section.
* `mail-whois-lines`, `sendmail-geoip-lines` and `sendmail-whois-lines`
actions now include by default only the first 1000 log lines in
the emails. Adjust `<grepopts>` to augment the behavior.
### Fixes
* reload in interactive mode appends all the jails twice (gh-825)
* reload server/jail failed if database used (but was not changed) and
some jail active (gh-1072)
* `filter.d/dovecot.conf` - also match unknown user in passwd-file.
Thanks Anton Shestakov
* Fix fail2ban-regex not parsing journalmatch correctly from filter config
* `filter.d/asterisk.conf` - fix security log support for Asterisk 12+
* `filter.d/roundcube-auth.conf`
- Updated regex to work with 'errors' log (1.0.5 and 1.1.1)
- Added regex to work with 'userlogins' log
* `action.d/sendmail*.conf` - use LC_ALL (superseeding LC_TIME) to override
locale on systems with customized LC_ALL
* performance fix: minimizes connection overhead, close socket only at
communication end (gh-1099)
* unbanip always deletes ip from database (independent of bantime, also if
currently not banned or persistent)
* guarantee order of dbfile to be before dbpurgeage (gh-1048)
* always set 'dbfile' before other database options (gh-1050)
* kill the entire process group of the child process upon timeout (gh-1129).
Otherwise could lead to resource exhaustion due to hanging whois
processes.
* resolve `/var/run/fail2ban` path in setup.py to help installation
on platforms with `/var/run` -> /run symlink (gh-1142)
### New Features
* RETURN iptables target is now a variable: `<returntype>`
* New type of operation: pass2allow, use fail2ban for "knocking",
opening a closed port by swapping blocktype and returntype
* New filters:
- froxlor-auth - Thanks Joern Muehlencord
- apache-pass - filter Apache access log for successful authentication
* New actions:
- shorewall-ipset-proto6 - using proto feature of the Shorewall. Still requires
manual pre-configuration of the shorewall. See the action file for detail.
* New jails:
- pass2allow-ftp - allows FTP traffic after successful HTTP authentication
### Enhancements
* `action.d/cloudflare.conf` - improved documentation on how to allow
multiple CF accounts, and jail.conf got new compound action
definition action_cf_mwl to submit cloudflare report.
* Check access to socket for more detailed logging on error (gh-595)
* fail2ban-testcases man page
* `filter.d/apache-badbots.conf`, `filter.d/nginx-botsearch.conf` - add
HEAD method verb
* Revamp of Travis and coverage automated testing
* Added a space between IP address and the following colon
in notification emails for easier text selection
* Character detection heuristics for whois output via optional setting
in mail-whois*.conf. Thanks Thomas Mayer.
Not enabled by default, if _whois_command is set to be
%(_whois_convert_charset)s (e.g. in `action.d/mail-whois-common.local`),
it
- detects character set of whois output (which is undefined by
RFC 3912) via heuristics of the file command
- converts whois data to UTF-8 character set with iconv
- sends the whois output in UTF-8 character set to mail program
- avoids that heirloom mailx creates binary attachment for input with
unknown character set
ver. 0.9.2 (2015/04/29) - better-quick-now-than-later
----------
### Fixes
* Fix ufw action commands
* infinite busy loop on _escapedTags match in substituteRecursiveTags gh-907.
Thanks TonyThompson
* port[s] typo in jail.conf/nginx-http-auth gh-913. Thanks Frederik Wagner
(fnerdwq)
* $ typo in jail.conf. Thanks Skibbi. Debian bug #767255
* grep'ing for IP in *mail-whois-lines.conf should now match also
at the beginning and EOL. Thanks Dean Lee
* `jail.conf`
- `php-url-fopen`: separate logpath entries by newline
* failregex declared direct in jail was joined to single line (specifying of
multiple expressions was not possible).
* `filters.d/exim.conf` - cover different settings of exim logs
details. Thanks bes.internal
* `filter.d/postfix-sasl.conf` - failregex is now case insensitive
* `filters.d/postfix.conf` - add 'Client host rejected error message' failregex
* `fail2ban/__init__.py` - add strptime thread safety hack-around
* recidive uses `iptables-allports` banaction by default now.
Avoids problems with iptables versions not understanding 'all' for
protocols and ports
* `filter.d/dovecot.conf`
- match pam_authenticate line from EL7
- match unknown user line from EL7
* Use `use_poll=True` for Python 2.7 and >=3.4 to overcome "Bad file
descriptor" msgs issue (gh-161)
* `filter.d/postfix-sasl.conf` - tweak failregex and add ignoreregex to ignore
system authentication issues
* fail2ban-regex reads filter file(s) completely, incl. '.local' file etc.
(gh-954)
* firewallcmd-* actions: split output into separate lines for grepping (gh-908)
* Guard unicode encode/decode issues while storing records in the database.
Fixes "binding parameter error (unsupported type)" (gh-973), thanks to kot
for reporting
* `filter.d/sshd` added regex for matching openSUSE ssh authentication failure
* `filter.d/asterisk.conf`:
- Dropped "Sending fake auth rejection" failregex since it incorrectly
targets the asterisk server itself
- match "hacking attempt detected" logs
### New Features
* New filters:
- postfix-rbl Thanks Lee Clemens
- apache-fakegooglebot.conf Thanks Lee Clemens
- nginx-botsearch Thanks Frantisek Sumsal
- drupal-auth Thanks Lee Clemens
* New recursive embedded substitution feature added:
- `<<PREF>HOST>` becomes `<IPV4HOST>` for PREF=`IPV4`;
- `<<PREF>HOST>` becomes `1.2.3.4` for PREF=`IPV4` and IPV4HOST=`1.2.3.4`;
* New interpolation feature for config readers - `%(known/parameter)s`.
(means last known option with name `parameter`). This interpolation makes
possible to extend a stock filter or jail regexp in .local file
(opposite to simply set failregex/ignoreregex that overwrites it),
see gh-867.
* Monit config for fail2ban in `files/monit/`
* New actions:
- `action.d/firewallcmd-multiport` and `action.d/firewallcmd-allports` Thanks Donald Yandt
- `action.d/sendmail-geoip-lines.conf`
- `action.d/nsupdate` to update DNSBL. Thanks Andrew St. Jean
* New status argument for fail2ban-client -- flavor:
`fail2ban-client status <jail> [flavor]`
- empty or "basic" works as-is
- "cymru" additionally prints (ASN, Country RIR) per banned IP
(requires dnspython or dnspython3)
* Flush log at USR1 signal
### Enhancements
* Enable multiport for firewallcmd-new action. Closes gh-834
* files/debian-initd migrated from the debian branch and should be
suitable for manual installations now (thanks Juan Karlo de Guzman)
* Define empty ignoreregex in filters which didn't have it to avoid
warnings (gh-934)
* `action.d/{sendmail-*,xarf-login-attack}.conf` - report local
timezone not UTC time/zone. Closes gh-911
* Conditionally log Ignore IP with reason (dns, ip, command). Closes gh-916
* Absorbed DNSUtils.cidr into addr2bin in filter.py, added unittests
* Added syslogsocket configuration to fail2ban.conf
* Note in the `jail.conf` for the recidive jail to increase dbpurgeage (gh-964)
ver. 0.9.1 (2014/10/29) - better, faster, stronger
----------
### Refactoring (IMPORTANT -- Please review your setup and configuration)
* `iptables-common.conf` replaced `iptables-blocktype.conf`
(`iptables-blocktype.local` should still be read) and now also
provides defaults for the chain, port, protocol and name tags
### Fixes
* start of file2ban aborted (on slow hosts, systemd considers the server has
been timed out and kills him), see gh-824
* UTF-8 fixes in pure-ftp thanks to Johannes Weberhofer. Closes gh-806.
* systemd backend error on bad utf-8 in python3
* badips.py action error when logging HTTP error raised with badips request
* fail2ban-regex failed to work in python3 due to space/tab mix
* recidive regex samples incorrect log level
* journalmatch for recidive incorrect PRIORITY
* loglevel couldn't be changed in fail2ban.conf
* Handle case when no sqlite library is available for persistent database
* Only reban once per IP from database on fail2ban restart
* Nginx filter to support missing server_name. Closes gh-676
* fail2ban-regex assertion error caused by miscount missed lines with
multiline regex
* Fix actions failing to execute for Python 3.4.0. Workaround for
http://bugs.python.org/issue21207
* Database now returns persistent bans on restart (bantime < 0)
* Recursive action tags now fully processed. Fixes issue with bsd-ipfw
action
* Fixed TypeError with "ipfailures" and "ipjailfailures" action tags.
Thanks Serg G. Brester
* Correct times for non-timezone date times formats during DST
* Pass a copy of, not original, aInfo into actions to avoid side-effects
* Per-distribution paths to the exim's main log
* Ignored IPs are no longer banned when being restored from persistent
database
* Manually unbanned IPs are now removed from persistent database, such they
wont be banned again when Fail2Ban is restarted
* Pass "bantime" parameter to the actions in default jail's action
definition(s)
* `filters.d/sieve.conf` - fixed typo in _daemon. Thanks Jisoo Park
* cyrus-imap -- also catch also failed logins via secured (imaps/pop3s).
Regression was introduced while strengthening failregex in 0.8.11 (bd175f)
Debian bug #755173
* postfix-sasl - added journalmatch. Thanks Luc Maisonobe
* postfix* - match with a new daemon string (postfix/submission/smtpd).
Closes gh-804 . Thanks Paul Traina
* apache - added filter for AH01630 client denied by server configuration.
### New Features
* New filters:
- monit Thanks Jason H Martin
- directadmin Thanks niorg
- apache-shellshock Thanks Eugene Hopkinson (SlowRiot)
* New actions:
- symbiosis-blacklist-allports for Bytemark symbiosis firewall
- fail2ban-client can fetch the running server version
- Added Cloudflare API action
### Enhancements
* Start performance of fail2ban-client (and tests) increased, start time
and cpu usage rapidly reduced. Introduced a shared storage logic, to
bypass reading lots of config files (see gh-824).
Thanks to Joost Molenaar for good catch (reported gh-820).
* Fail2ban-regex - add print-all-matched option. Closes gh-652
* Suppress fail2ban-client warnings for non-critical config options
* Match non "Bye Bye" disconnect messages for sshd locked account regex
* courier-smtp filter:
- match lines with user names
- match lines containing "535 Authentication failed" attempts
* Add `<chain>` tag to iptables-ipsets
* Realign fail2ban log output with white space to improve readability. Does
not affect SYSLOG output
* Log unhandled exceptions
* cyrus-imap: catch "user not found" attempts
* Add support for Portsentry
ver. 0.9.0 (2014/03/14) - beta
----------
Carries all fixes, features and enhancements from 0.8.13 (unreleased) with
major changes.
The minimum supported python version is now 2.6. If you have python-2.4 or 2.5
you can use the 0.8.12 version of fail2ban.
Please take note of release notes:
https://github.com/fail2ban/fail2ban/releases/tag/0.9.0
Please test your configuration before relying on it.
Nearly all development is thanks to Steven Hiscocks (THANKS!), merging,
testcases and timezone support from Daniel Black, and code-review and minor
additions from Yaroslav Halchenko.
### Refactoring (IMPORTANT -- Please review your setup and configuration):
* [..bddbf1e] jail.conf was heavily refactored and now is similar
to how it looked on Debian systems:
- default action could be configured once for all jails
- jails definitions only provide customizations (port, logpath)
- no need to specify 'filter' if name matches jail name
* [..5aef036] Core functionality moved into fail2ban/ module.
Closes gh-26
- tests included in module to aid testing and debugging
* Added fail2ban persistent database
- default location at `/var/lib/fail2ban/fail2ban.sqlite3`
- allows active bans to be reinstated on restart
- log files read from last position after restart
* Added systemd journal backend
- Dependency on python-systemd
- New "journalmatch" option added to filter configs files
- New "systemd-journal" option added to fail2ban-regex
* Added python3 support
* Support %z (Timezone offset) and %f (sub-seconds) support for
datedetector. Enhanced existing date/time have been updated patterns to
support these. ISO8601 now defaults to localtime unless specified otherwise.
Some filters have been change as required to capture these elements in the
right timezone correctly.
* Log levels are now set by Syslog style strings e.g. DEBUG, ERROR.
- Log level INFO is now more verbose
* Optionally can read log files starting from "head" or "tail".
- See "logpath" option in jail.conf(5) man page.
* Can now set log encoding for files per jail.
- Default uses systemd locale.
### New Features
* [..c7ae460] Multiline failregex. Close gh-54
* [8af32ed] Guacamole filter and support for Apache Tomcat date
format
* [..b6059f4] 'timeout' option for actions Close gh-60 and Debian
bug #410077. Also it would now capture and include stdout and stderr
into logging messages in case of error or at DEBUG loglevel.
* Added action xarf-login-attack to report formatted attack messages
according to the XARF standard (v0.2). Close gh-105
* Support PyPy
* Add filter for apache-botsearch
* Add filter for kerio. Thanks Tony Lawrence for blog of regexs and
providing samples. Close gh-120
* Filter for stunnel
* Filter for Counter Strike 1.6. Thanks to onorua for logs.
Close gh-347
* Filter for squirrelmail. Close gh-261
* Filter for tine20. Close gh-583
* Custom date formats (strptime) can now be set in filters and jail.conf
* Python based actions can now be created.
- SMTP action for sending emails on jail start, stop and ban.
* Added action to use badips.com reporting and blacklist
- Requires Python 2.7+
### Enhancements
* Fail2ban-regex - don't accumulate lines if not printing them.
add options to suppress output of missed/ignored lines. Close gh-644
* Asterisk now supports syslog format
* Jail names increased to 26 characters and iptables prefix reduced
from fail2ban- to f2b- as suggested by buanzo in gh-462.
* Multiline filter for sendmail-spam. Close gh-418
* Multiline regex for Disconnecting: Too many authentication failures for
root [preauth]\nConnection closed by 6X.XXX.XXX.XXX [preauth]
* Multiline regex for Disconnecting: Connection from 61.XX.XX.XX port
51353\nToo many authentication failures for root [preauth]. Thanks
Helmut Grohne. Close gh-457
* Replacing use of deprecated API (.warning, .assertEqual, etc)
* [..a648cc2] Filters can have options now too which are substituted into
failregex / ignoreregex
* [..e019ab7] Multiple instances of the same action are allowed in the
same jail -- use actname option to disambiguate.
* Add honeypot email address to exim-spam filter as argument
* Properties and methods of actions accessible from fail2ban-client
- Use of properties replaces command actions "cinfo" interface
ver. 0.8.13 (2014/03/15) - maintenance-only-from-now-on
-----------
### Fixes
- action firewallcmd-ipset had non-working actioncheck. Removed.
redhat bug #1046816.
- filter pureftpd - added _daemon which got removed. Added
### New Features
- filter nagios - detects unauthorized access to the nrpe daemon (Ivo Truxa)
- filter sendmail-{auth,reject} (jserrachinha and cepheid666 and fab23).
### Enhancements
- filter asterisk now supports syslog format
- filter pureftpd - added all translations of "Authentication failed for
user"
- filter dovecot - lip= was optional and extended TLS errors can occur.
Thanks Noel Butler.
ver. 0.8.12 (2014/01/22) - things-can-only-get-better
----------
- IMPORTANT incompatible changes:
- Rename firewall-cmd-direct-new to firewallcmd-new to fit within jail name
name length. As per gh-395
- mysqld-syslog-iptables jailname was too long. Renamed to mysqld-syslog.
Part of gh-447.
### Fixes
- allow for ",milliseconds" in the custom date format of proftpd.log
- allow for ", referer ..." in apache-* filter for apache error logs.
- allow for spaces at the beginning of kernel messages. Closes gh-448
- recidive jail to block all protocols. Closes gh-440. Thanks Ioan Indreias
- smtps not a IANA standard and has been removed from Arch. Replaced with
465. Thanks Stefan. Closes gh-447
- add 'flushlogs' command to allow logrotation without clobbering logtarget
settings. Closes gh-458, Debian bug #697333, Redhat bug #891798.
- complain action - ensure where not matching other IPs in log sample.
Closes gh-467
- Fix firewall-cmd actioncheck - patch from Adam Tkac. Redhat Bug #979622
- Fix apache-common for apache-2.4 log file format. Thanks Mark White.
Closes gh-516
- Asynchat changed to use push method which verifys whether all data was
send. This ensures that all data is sent before closing the connection.
- Removed unnecessary reference to as yet undeclared $jail_name when checking
a specific jail in nagios script.
- Filter dovecot reordered session and TLS items in regex with wider scope
for session characters. Thanks Ivo Truxa. Closes gh-586
- A single bad failregex or command syntax in configuration files won't stop
fail2ban from starting. Thanks Tomasz Ciolek. Closes gh-585.
### Enhancements
- long names on jails documented based on iptables limit of 30 less
len("fail2ban-").
- remove indentation of name and loglevel while logging to SYSLOG to
resolve syslog(-ng) parsing problems. Closes Debian bug #730202.
- updated check_fail2ban to return performance data for all jails.
- filter apache-noscript now includes php cgi scripts.
Thanks dani. Closes gh-503
- exim-spam filter to match spamassassin log entry for option SAdevnull.
Thanks Ivo Truxa. Closes gh-533
- `filter.d/nsd.conf` -- also amended Unix date template to match nsd format
- Added to sshd filter expression for `Received disconnect from <HOST>: 3:
...: Auth fail`. Thanks Marcel Dopita. Closes gh-289
- loglines now also report "[PID]" after the name portion
- Added `filter.d/ejabberd-auth`
- Improved ACL-handling for Asterisk
- loglines now also report "[PID]" after the name portion
- Added improper command pipelining to postfix filter.
### New Features
- `filter.d/solid-pop3d` -- added thanks to Jacques Lav!gnotte on mailinglist.
- Add filter for apache-modsecurity.
- `filter.d/nsd.conf` -- also amended Unix date template to match nsd format
- Added openwebmail filter thanks Ivo Truxa. Closes gh-543
- Added filter for freeswitch. Thanks Jim and editors and authors of
http://wiki.freeswitch.org/wiki/Fail2ban
- Added groupoffice filter thanks to logs from Merijn Schering.
Closes gh-566
- Added filter for horde
- Added filter for squid. Thanks Roman Gelfand.
- Added filter for ejabberd-auth.
- Added `filter.d/openwebmail` filter thanks Ivo Truxa. Closes gh-543
- Added `filter.d/groupoffice` filter thanks to logs from Merijn Schering.
Closes gh-566
- Added `action.d/badips`. Thanks to Amy for making a nice API.
- Added firewallcmd-ipset action.
- Added ufw action. Thanks Guilhem Lettron. lp-#701522
- Added blocklist_de action.
ver. 0.8.11 (2013/11/13) - loves-unittests-and-tight-DoS-free-filter-regexes
----------
In light of CVE-2013-2178 that triggered our last release we have put
a significant effort into tightening all of the regexs of our filters
to avoid another similar vulnerability. All filters have been updated
and some to catch more login/authentication failures and to support
for newer application versions. There are test cases for most log
cases of failures now.
As usual, if you have other examples that demonstrate that a filter is
insufficient, or if we have inadvertently introduced a regression,
please provide us with example log lines on the github issue tracker
http://github.com/fail2ban/fail2ban/issues and NOT on a random blog in
some obscure corner of the Internet.
Many thanks to our contributors for this release Daniel Black, Yaroslav
Halchenko, Steven Hiscocks, Mark McKinstry, Andy Fragen, Orion Poplawski,
Alexander Dietrich, JP Espinosa, Jamyn Shanley, Beau Raines, François
Boulogne and others who have helped on IRC and mailing list, logged issues
and bug requests.
### IMPORTANT incompatible changes
Filter name changes:
* 'lighttpd-fastcgi' filter has been renamed to 'suhosin'
* 'sasl' has been renamed to 'postfix-sasl'
* 'exim' spam catching failregexes was split out into 'exim-spam'
These changes will require changing jail.{conf,local} if any of
those filters were used.
### Fixes
- Jonathan Lanning
* `filter.d/asterisk` -- identified another regex for blocking. Also channel
ID is hex not decimal as noted in sample logs provided.
- Daniel Black & Marcel Dopita
* `filter.d/apache-auth` -- fixed and apache auth samples provide. Closes gh-286
- Yaroslav Halchenko
* `filter.d/common.conf` -- make colon after [daemon] optional. Closes gh-267
* `filter.d/apache-common.conf` -- support apache 2.4 more detailed error