Fail2ban
Oct 19, 2009
i got output log for fail2ban looking like this, it stops to ban ip's theen i need to restart fail2ban and it works again, anyone could tell me what is a problem ?
log
Code:
2009-10-18 04:21:51,017 fail2ban.server : INFO Changed logging target to /var/log/fail2ban.log for Fail2ban v0.8.3
2009-10-18 04:21:51,018 fail2ban.jail : INFO Creating new jail 'apache-w00tw00t'
2009-10-18 04:21:51,019 fail2ban.jail : INFO Jail 'apache-w00tw00t' uses Gamin
2009-10-18 04:21:51,021 fail2ban.filter : INFO Added logfile = /var/log/httpd/access_log
2009-10-18 04:21:51,023 fail2ban.filter : INFO Set maxRetry = 1
2009-10-18 04:21:51,025 fail2ban.filter : INFO Set findtime = 600
2009-10-18 04:21:51,026 fail2ban.actions: INFO Set banTime = 86400
2009-10-18 04:21:51,041 fail2ban.jail : INFO Jail 'apache-w00tw00t' started
2009-10-18 04:21:52,039 fail2ban.filter : INFO Log rotation detected for /var/log/httpd/access_log
2009-10-18 05:07:33,087 fail2ban.filter : INFO Log rotation detected for /var/log/httpd/access_log
2009-10-18 05:07:33,366 fail2ban.actions: WARNING [apache-w00tw00t] Ban 212.174.153.69
2009-10-18 16:04:58,063 fail2ban.actions: WARNING [apache-w00tw00t] Ban 193.74.64.40
2009-10-18 20:17:03,087 fail2ban.actions: WARNING [apache-w00tw00t] Ban 88.80.216.20
2009-10-19 03:35:41,737 fail2ban.actions: WARNING [apache-w00tw00t] Ban 209.160.72.92
2009-10-19 05:07:34,324 fail2ban.actions: WARNING [apache-w00tw00t] Unban 212.174.153.69
2009-10-19 05:07:34,330 fail2ban.actions.action: ERROR iptables -n -L INPUT | grep -q fail2ban-w00tw00t returned 100
2009-10-19 05:07:34,330 fail2ban.actions.action: ERROR Invariant check failed. Trying to restore a sane environment
2009-10-19 05:07:34,337 fail2ban.actions.action: ERROR iptables -D INPUT -p tcp -j fail2ban-w00tw00t
iptables -F fail2ban-w00tw00t
iptables -X fail2ban-w00tw00t returned 100
2009-10-19 05:08:19,123 fail2ban.actions.action: ERROR iptables -D fail2ban-w00tw00t -s 212.174.153.69 -j DROP returned 100
2009-10-19 08:55:52,673 fail2ban.actions: WARNING [apache-w00tw00t] Unban 193.74.64.40
2009-10-19 08:55:52,693 fail2ban.actions.action: ERROR iptables -D fail2ban-w00tw00t -s 193.74.64.40 -j DROP returned 100
2009-10-19 08:55:52,695 fail2ban.actions: WARNING [apache-w00tw00t] Unban 88.80.216.20
2009-10-19 08:55:52,714 fail2ban.actions.action: ERROR iptables -D fail2ban-w00tw00t -s 88.80.216.20 -j DROP returned 100
2009-10-19 08:55:52,715 fail2ban.actions: WARNING [apache-w00tw00t] Unban 209.160.72.92
2009-10-19 08:55:52,736 fail2ban.actions.action: ERROR iptables -D fail2ban-w00tw00t -s 209.160.72.92 -j DROP returned 100
2009-10-19 08:55:52,758 fail2ban.jail : INFO Jail 'apache-w00tw00t' stopped
2009-10-19 08:55:54,272 fail2ban.server : INFO Changed logging target to /var/log/fail2ban.log for Fail2ban v0.8.3
2009-10-19 08:55:54,274 fail2ban.jail : INFO Creating new jail 'apache-w00tw00t'
2009-10-19 08:55:54,305 fail2ban.jail : INFO Jail 'apache-w00tw00t' uses Gamin
2009-10-19 08:55:54,369 fail2ban.filter : INFO Added logfile = /var/log/httpd/access_log
2009-10-19 08:55:54,370 fail2ban.filter : INFO Set maxRetry = 1
2009-10-19 08:55:54,373 fail2ban.filter : INFO Set findtime = 600
2009-10-19 08:55:54,374 fail2ban.actions: INFO Set banTime = 86400
2009-10-19 08:55:54,391 fail2ban.jail : INFO Jail 'apache-w00tw00t' started
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Aug 31, 2014
I activated fail2ban in Plesk 12 and set the SSH jail to ban after 2 retries for 24h on all ports.
This is the generated "/etc/fail2ban/jail.local":
Code:
[ssh]
enabled = true
maxretry = 2
action = iptables-allports[name=ssh]
I tested it and I'm only banned on the IP of SSH (I have one only for SSH and the Plesk panel).
I have 10 IPs in total on my server. I can still access all other IPs, i.e. my websites.
Why does fail2ban not block me completely?
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Sep 21, 2006
Hello, I recently got myself into an unmanaged VPS package and I noticed in my log files, countless attempts to ssh into the system. After a bit of searching, fail2ban looked like a good way to ban the brute force attacks automatically.
My question is what should I configure it with? There's the option for iptables or host.deny. I've read that iptables are not fully supported under Virtuozzo but the stuff I've read are a bit dated. Are there still some issues with iptables under Virtuozzo?
What I'm using now:
*Virtuozzo 3 -not sure on exact version. Whatever SolarVPS is using.
*Signed up with centos4
*uname -r = 2.6.9-022stab078.14-enterprise
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May 7, 2015
So on our server, fail2ban got itself in a mess. Tried various things to fix, to no avail, so figured I'd just do a fresh install of it. There was minimal customisation to it that I couldn't re-do.
Note I'd already rm'd /etc/fail2ban - as on previous attempts, the files in here didn't appear to be restored to their defaults. So I figured removing the directory would force this to happen (Whether this was wise I'm not sure!) ;-)
So, following instructions here: [URL] .... I now get the following:
# wget http://kb.sp.parallels.com/Attachments/kcs-36245/fail2ban.gz
# gunzip fail2ban.gz
# mv fail2ban /etc/init.d/fail2ban
# chmod 755 /etc/init.d/fail2ban
# ll /etc/init.d/fail2ban /etc/fail2ban/fail2ban.conf
ls: cannot access /etc/fail2ban/fail2ban.conf: No such file or directory
-rwxr-xr-x 1 root root 2141 Aug 15 2014 /etc/init.d/fail2ban
I then uninstall/reinstall with # /usr/local/psa/admin/bin/autoinstaller
(Have tried via the web interface too)
I then get:
# ll /etc/init.d/fail2ban /etc/fail2ban/fail2ban.conf
ls: cannot access /etc/fail2ban/fail2ban.conf: No such file or directory
-rwxr-xr-x 1 root root 2141 Aug 15 2014 /etc/init.d/fail2ban
i.e., no change..
and if I go to the fail2ban settings in Plesk, I get:
Internal error: f2bmng failed: ERROR:f2bmng:No section: 'Definition'
Message f2bmng failed: ERROR:f2bmng:No section: 'Definition'
Is there a way to regenerate what should be in /etc/fail2ban by default?
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Aug 12, 2014
I am not able to add a new filter to fail2ban
If I go in plesk panel to: Home > Tools & Settings >IP Address Banning > Jails > managing Filters > add filter > type in name & filtercontent and save I get "Information: The jail filter was added". But i can not see the new added filter in the Plesk Filter List (still just the 12 Filters in the list).
On the filesystem > /etc/fail2ban/filter.d/ i can see the new file but with the extension .local - usulay the file is named like xyz.conf
The output of /usr/local/psa/admin/sbin/f2bmng --get-filters-list
[["apache-auth", "fail2ban"], ["apache-badbots", "fail2ban"], ["apache-common", "fail2ban"],
["common", "fail2ban"], ["plesk-courierlogin", "plesk-fail2ban-configurator"],
["plesk-dovecot", "plesk-fail2ban-configurator"], ["plesk-horde", "plesk-fail2ban-configurator"],
["plesk-panel", "plesk-fail2ban-configurator"], ["plesk-qmail", "plesk-fail2ban-configurator"],
["plesk-roundcube", "plesk-fail2ban-configurator"], ["postfix-sasl", "fail2ban"],
["proftpd", "fail2ban"], ["recidive", "fail2ban"], ["sshd", "fail2ban"], ["test", null]]
test is the name i choosed for the new filter and it seems the second field has "null" .....
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Jul 14, 2014
we have a brute force attack:
Code:
188.132.180.106 - - [14/Jul/2014:22:03:37 +0200] "POST /administrator/index.php HTTP/1.0" 303 262 "-" "-"
188.132.180.106 - - [14/Jul/2014:22:03:38 +0200] "GET /administrator/index.php HTTP/1.0" 200 7244 "-" "-"
188.132.180.106 - - [14/Jul/2014:22:03:38 +0200] "GET /administrator/index.php HTTP/1.0" 200 7117 "-" "-"
188.132.180.106 - - [14/Jul/2014:22:03:39 +0200] "POST /administrator/index.php HTTP/1.0" 303 262 "-" "-"
[code]....
And so on, but the Fail2Ban doesn't lock this ip address, why? And how can we manually lock about the webinterface this ip?
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Aug 10, 2014
Well with activated apache-badbots jails I have in a short time a hugh amount of banned IPs. Usualy action for this is to use iptables-ipset-proto and save all this baned IPs in the ipset insteed as normal in the iptables list - thats also a suggestion which was discussed in the fail2ban forum for better performance. And yes I had this running (ipset package installed) with my manual installation of fail2ban before I switched over to the plesk integrated.
action = iptables-ipset-proto6[name=BadBots, port="http,https,7080,7081"] insteed of action = iptables-multiport[name=BadBots, port="http,https,7080,7081"]
So how can I add iptables-ipset-proto4.conf, iptables-ipset-proto6-allports.conf, iptables-ipset-proto6.conf to the plesk version of fail2ban??
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Mar 26, 2015
I have the problem that the ip blocked "failban" too short (set findtime=1800).
The ip should be blocked for 30 minutes (the second time).
2015-03-23 22:24:59,779 fail2ban.filter [2807]: INFO Set maxRetry = 5
2015-03-23 22:24:59,780 fail2ban.filter [2807]: INFO Set findtime = 1800
2015-03-23 22:24:59,781 fail2ban.actions[2807]: INFO Set banTime = 600
2015-03-27 04:50:56,209 fail2ban.actions[2807]: WARNING [ssh] Ban 195.xxx.xxx.xxx
2015-03-27 05:00:56,913 fail2ban.actions[2807]: WARNING [ssh] Unban 195.xxx.xxx.xxx
2015-03-27 05:09:05,483 fail2ban.actions[2807]: WARNING [ssh] Ban 195.xxx.xxx.xxx
2015-03-27 05:19:06,153 fail2ban.actions[2807]: WARNING [ssh] Unban 195.xxx.xxx.xxx
2015-03-27 05:35:39,317 fail2ban.actions[2807]: WARNING [ssh] Ban 195.xxx.xxx.xxx
2015-03-27 05:45:40,012 fail2ban.actions[2807]: WARNING [ssh] Unban 195.xxx.xxx.xxx
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Sep 2, 2014
I setup and enable fail2ban by Plesk 12 (tools and settings). What happens is, few days after i am unable to access this option again. I got time out
I've tried to disable by ssh "fail2ban-client stop" and nothing... the command become loading and never conclude,
how to remove or stop fail2ban ?
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Feb 4, 2015
I would find an easy way to add a list of IP in Fail2ban whitelist in linux console.What is the file to modify ? Is there a command line or a process ?
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Apr 22, 2015
In the fail2ban module of plesk is a tab for "logs".
Here you can view Fail2ban logs.
No items found.Click to expand...
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Jun 29, 2015
I was wondering why all the jails in fail2ban are inactive..
Do I need to enable all of them? or there's only a specific list that is useful?
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Feb 11, 2015
How to set a permanent ban per IP in Fail2ban?? I have banned continuously some IPs with recidibe and I need put this IPs in a permanent blacklist.
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May 18, 2015
Ubuntu 10.04.4 LTS
12.0.18 Update #46, last updated at May 15, 2015 03:57 AM
Just recently (after update #46) Fail2Ban stopped working and I couldn't restart it or pin point the reason behind it. I decided to uninstall F2B component via Plesk installer.
F2B uninstalled however when I try to install it again I get error : 'Installation will not continue'
Where to start and where can I find log files that could give me some clues?
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Jun 30, 2014
Since upgrading to 12.0.18 Update # 5 fail2ban stopped working.
Code:
[nimda4597@xxxx fail2ban]# service fail2ban status
fail2ban-server (pid 1881) is running...
Status
[Code].....
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Apr 25, 2015
I installed fail2ban via the autoinstaller today. I got a failed install. There is no /etc/init.d/fail2ban file, and no /usr/bin/fail2ban-server.
On the other hand yum-search tells me it's installed:
plesk-fail2ban-configurator.noarch : plesk-specific jails and filters for fail2ban
fail2ban.noarch : Scan logfiles and ban ip addresses with too many password failures​
I tried to remove it in autoinstaller:
Installing packages
Loaded plugins: fastestmirror, priorities
Running rpm_check_debug
Error in PREUN scriptlet in rpm package fail2ban
[Code] .....
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Feb 4, 2015
After changing website domain name (from development one -dev-domain.com- to production one) we have this error in fail2ban.log :
2015-02-01 06:46:41,176 fail2ban.filter [2848]: ERROR Unable to open /var/www/vhosts/system/dev-domain.com/logs/proxy_access_log
2015-02-01 06:46:41,176 fail2ban.filter [2848]: ERROR [Errno 2] No such file or directory: '/var/www/vhosts/system/dev-domain.com/logs/proxy_access_log'
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/server/filter.py", line 520, in getFailures
has_content = container.open()
File "/usr/lib/python2.7/dist-packages/server/filter.py", line 601, in open
self.__handler = open(self.__filename)
IOError: [Errno 2] No such file or directory: '/var/www/vhosts/system/dev-domain.com/logs/proxy_access_log'
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Sep 18, 2014
When I click on the "Change settings" button for any of my jails a page opens showing the following error message:
Messagef2bmng failed: ERROR:f2bmng:File contains parsing errors: /etc/fail2ban/action.d/iptables-multiport-log.conf [line 24]: 'iptables -N fail2ban-<name>-log
' [line 26]: 'iptables -A fail2ban-<name>-log -j DROP
' [line 33]: 'iptables -F fail2ban-<name>
' [line 34]: 'iptables -F fail2ban-<name>-log
' [line 35]: 'iptables -X fail2ban-<name>
' [line 36]: 'iptables -X fail2ban-<name>-log
'
FileAgent.php
Line243
TypePleskUtilExceptionClick to expand...
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Feb 3, 2015
I have just looked at the plesk panel log - /usr/local/psa/admin/logs/panel.log - and seen an alarming number of attempts to access plesk using the admin user. i.e.
[2015-02-02 14:53:46] ERR [panel] [Action Log] Failed login attempt with login 'admin' from IP 50.62.148.176
I have fail2ban installed and set up for other things...
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Feb 11, 2015
i'm running 12.0.18#34 on PCS dedicated server. i recently discovered that some of the default jails on fail2ban that is shipped with Plesk 12 were not working correctly. Let me explain what i mean. For instance, the plesk-panel jail. The logs were parsed correctly, the command was successfully appended in iptables list, the fail2ban log was updated. Still, the intruder was not blocked. I kept reading "already banned" on the fail2ban.log but actually there was no blocking.
After some checks, i found out that fail2ban default configuration states SSH as default blocking port.
that means, the block was working but only for ssh hits. thus the plesk-panel admin page hits were passing through.
since i added port=http,https on jail.local > plesk-panel and did it a restart on fail2ban service, only then did it start to actually block incoming hits.
I think this should be verified by programmers group and maybe include a fix in some future minor update.
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Jul 3, 2014
I have updated from 11.5 to 12.0 mostly in order to use Fail2Ban.
I have also installed a new Plesk 12 license key to make sure that the license allows Fail2Ban. It says now that Fail2Ban is "On". But I can not find the menu entry to get to the Fail2Ban configuration. It is simply not there... (it is supposed to be in the Securitiy menu in the Tools and Settings section...)
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Jul 14, 2014
In Fail2ban (great idea to include it in plesk!) settings you can set "Time interval for detection of subsequent attacks" (findtime) in general. But it would be interesting this setting per Jail.
You could have 2 jail with same filter but different findtime. Example:
Jail 1) 5 failures in 600 seconds: 1800 seconds ban
Jail 2) 30 failures in 86400 seconds: 604800 seconds ban
There are bots that detect if you have some protection fail2ban or similar and it will adapt, login attempt every 300 seconds for example. Jail 1 no detect this attack, but Jail 2 yes.
See the example, live time :
[root@--------- log]# cat /var/log/maillog | grep 'warning: ---------'
Jul 14 07:10:54 --------- postfix/smtpd[5482]: warning: ---------[--.--.--.---]: SASL LOGIN authentication failed: authentication failure
Jul 14 07:54:16 --------- postfix/smtpd[4782]: warning: ---------[--.--.--.---]: SASL LOGIN authentication failed: authentication failure
[Code] .....
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Jul 15, 2014
When I click /admin/server-protection/settings/ It takes me to the main page with a message saying
Code:
Error: Unable to encode IDN email address '': email address is invalid
Plesk 12.0.18 on a CentOS server.
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Jan 10, 2015
Compliments about the integration of Fail2Ban. I saw a lot of blocks on different IP addresses that tried to logon to the server. Fail2Ban is setup to monitor SSH, FTP, and some more.
It is however not possible to activate the "plesk-apache" and "plesk-apache-badbot" jails.
I receive the following error when I try to activate the jails:
Cannot activate the selected jails: f2bmng failed: ERROR NOK: ('plesk-apache',)
ERROR NOK: (13, 'Permission denied')
ERROR NOK: (13, 'Permission denied')
......
ERROR:f2bmng:Command '['/usr/bin/fail2ban-client', 'reload', 'plesk-apache']' returned non-zero exit status 255
ERROR:f2bmng:Failed to reload following jails due to errors in configuration: plesk-apache
When i look into the logfile of fail2ban, i see that there are no permissions for the log files:
2015-01-10 20:14:40,987 fail2ban.comm [19428]: WARNING Command ['set', 'plesk-apache', 'addlogpath', '/var/www/vhosts/system/[domainname]/logs/error_log'] has failed. Received IOError(13, 'Permission denied')
The file permissions are set as following on all the log files:
-rw-r--r-- root root
I'd really like to activate Fail2Ban for Apache too.
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Aug 20, 2014
Code:
Fehler: f2bmng failed: Job for fail2ban.service failed. See 'systemctl status fail2ban.service' and 'journalctl -xn' for details.
ERROR:f2bmng:Failed to start fail2ban service
-- Unit fail2ban.service has failed.
--
-- The result is failed.
Aug 20 14:22:13 noreply.flusiserver.de systemd[1]: Unit fail2ban.service entered failed state.
Aug 20 14:22:14 noreply.flusiserver.de agetty[14140]: /dev/hvc0: No such file or directoryClick to expand...
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Dec 11, 2014
I'm just wondering how I can start logging activity in Fail2Ban. I've got the following line in the "logs" tab in "IP Address Banning" in the Plesk UI:
/var/log/fail2ban.log
However when I check this it states "The file is empty".
I'm assuming there will be a setting somewhere that tells fail2ban to log to that file but I'm not sure where/what it is?
I know for sure that I've had IP's banned but they just don't appear to be logged.
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Mar 23, 2015
I have fail2ban and try to install http-get-dos rule. but I have no way to make it work.
Here are my files :
# cat /etc/fail2ban/filter.d/http-get-dos.local
[Definition]
failregex = ^<HOST>.*"GET
ignoreregex =
[Code] ....
Then, when I start fail2ban, I have this thing :
2015-03-24 00:33:25,473 fail2ban.jail [7070]: INFO Creating new jail 'http-get-dos'
2015-03-24 00:33:25,473 fail2ban.jail [7070]: INFO Jail 'http-get-dos' uses Gamin
2015-03-24 00:33:25,474 fail2ban.jail [7070]: INFO Initiated 'gamin' backend
2015-03-24 00:33:25,475 fail2ban.filter [7070]: INFO Added logfile = /var/www/vhosts/mydomain1/logs/access_log
2015-03-24 00:33:25,476 fail2ban.filter [7070]: INFO Added logfile = /var/www/vhosts/mydomain2/logs/access_log
[Code] ....
So, I do not understand where is coming from the set max... then, in my iptables, I have all the Chains, but not the http-get-dos one :
# iptables -L | grep Chain | grep dos
and finally, I made some stress test, geneating more than 5000hits in 5 min, and no luck, nothing.
If I run failregex :
# fail2ban-regex /var/www/vhosts/mydomain1/logs/access_log /etc/fail2ban/filter.d/http-get-dos.local
Running tests
=============
Use failregex file : /etc/fail2ban/filter.d/http-get-dos.local
Use log file : /var/www/vhosts/mydomain1/logs/access_log
Results
=======
Failregex: 55044 total
|- #) [# of hits] regular expression
| 1) [55044] ^<HOST>.*"GET
`-
Ignoreregex: 0 total
Date template hits:
|- [# of hits] date format
| [55429] Day/MONTH/Year:Hour:Minute:Second
`-
Lines: 55429 lines, 0 ignored, 55044 matched, 385 missed
Missed line(s): too many to print. Use --print-all-missed to print all 385 lines
Did I miss something in fail2ban configuration ? is there any pb to add custom rule to fail2ban in plesk ?
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Dec 3, 2014
I'm getting the following attempts every few minutes, I'd to put a stop to it with Fail2Ban but so far I've been unsuccessful. I get no IP bans in the Fail2Ban panel in Plesk 12.
Dec 3 23:24:14 XXX postfix/smtpd[2535]: warning: ca215.calcit.fastwebserver.de[146.0.42.84]: SASL LOGIN authentication failed: authentication failure
/etc/fail2ban/filter.d/sasl.conf
# Fail2Ban filter for postfix authentication failures
#
[INCLUDES]
[Code]....
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Jul 23, 2014
There is a strange problem with the new feature fail2ban. I have noticed that a local ip address (ip address from the webserver itself) was added to the blocked ip addresses of fail2ban now for the second time. What I can see is that it was the recidive jail.
If there is nginx used as reverse proxy you get a "502 Bad Gateway". Any way to find out more about the reason why an ip address is added to the list of blocked ip addresses in fail2ban?
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Dec 3, 2014
we use CentOS Linux 7.0.1406 (Core) Plesk Version 12.0.18 Update #26 I got reports of several users on my system, and i can confirm this myself, that fail2ban is blocking courier imap and postfix connections when i try to connect to the Plesk Server with Outlook 2013 and theBat and the Apple Mac Mail Client.
I used the correct login information but fail2ban blocked the IPs for no obvious reason:
Code:
2014-12-03 12:46:57,908 fail2ban.actions[920]: WARNING [plesk-postfix] Ban 82.134.94.102
2014-12-03 12:46:58,049 fail2ban.actions[920]: WARNING [plesk-courierimap] Ban 82.134.94.102
I disabled the two jails now and it works perfectly. But why is fail2ban blocking valid requests ? I tried it myself and i did not enter a wrong password or something. MaxRetry is 5 so this should not be a problem. The problem is not affecting all users but just a few. However all of them are using correct credentials so i dont understand why they are being blocked at all.
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Oct 22, 2014
I am not able to enable the recidive jail in Fail2Ban. I get the following error:
Code:
Unable to switch on the selected jails: f2bmng failed: WARNING 'ignoreregex' not defined in 'Definition'. Using default one: ''
ERROR No file(s) found for glob /var/log/fail2ban.log
ERROR Failed during configuration: Have not found any log file for recidive jail
ERROR:f2bmng:Command '['/usr/bin/fail2ban-client', 'reload', 'recidive']' returned non-zero exit status 255
ERROR:f2bmng:Failed to reload following jails due to errors in configuration: recidive
.
There is indeed no /var/log/fail2ban.log, but I doubt that manually creating it will correctly fix this problem.
The problem is also discussed @ [URL] ...., but in my case I have not switched on jails before switching on fail2ban. Also, the given resolution does not work.
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