Fail2ban scans log files like /var/log/pwdfail or /var/log/apache/error_log and bans IP that makes too many password failures. It updates firewall rules to reject the IP address.

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1answer
40 views

fail2ban identify the subscription specific error log which resulted in an IP ban [closed]

I am running Fail2Ban via Parallels Plesk 12.x on several CentOS 6 containers with several active jails (apache-noscripts, plesk-apache etc.). The Fail2Ban.log provides the IP address which was ...
0
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0answers
115 views

prevent phpbb bruteforcing with mod_security

Update: I edited this and added a fail2ban tag. Perhaps that might be another way to handle this issue. I'm running phpbb 3.0.13-PL1 and I would like to protect the login page from bruteforcing. I'm ...
0
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0answers
62 views

fail2ban WARNING invalid command on apache2 disabled websites

I have a problem on a Debian Squeezy webserver running fail2ban. Now and then, fail2ban stops working complaining of missing access.log: fail2ban.comm : WARNING Invalid command: ['set', ...
3
votes
2answers
1k views

Why is fail2ban not banning this attack?

I have fail2ban installed to ban bruteforce attempts on the ssh password. There are business requirements for not disabling password authentication on this machine. fail2ban was installed using the ...
0
votes
1answer
120 views

Setup fail2ban with apf

Along with BFD we have recently installed fail2ban on our server, it is CentOS and it uses APF to block IPs. I have hunted online on how to get the two to work however when an IP is blocked by ...
1
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3answers
1k views

fail2ban rule results in “iptables returned 200” error message

I just tried to add a new fail2ban rule that is supposed to scan Apache2 error logs for suspicious file access attempts (People who try to access three common login urls that do not exist usually ...
1
vote
1answer
334 views

Fail2ban configuration for nginx using firewallcmd in CentOS 7

Previously I have a CentOS 6.5 with Iptables and I configure some jails for nginx as suggested here: How To use fail2ban for Nginx?. But now I am in CentOS 7, trying to use the new firewall and ...
3
votes
3answers
2k views

Fail2Ban is not adding iptables rules

Fail2Ban is not adding iptables rules to block attackers. I'm running CentOS 6.5 (32 bit) Here's what I did: fail2ban was installed via yum using the epel repo I copied jail.conf to jail.local I ...
0
votes
2answers
726 views

fail2ban statistics? [closed]

Is there a program that parses fail2ban.log and produces some statistics? Or should I set out and write something custom for our hosts? We run mostly Debian and fail2ban with iptables.
2
votes
0answers
458 views

fail2ban fails to block from auth.log with directadmin

i'm using directadmin on a Ubuntu server. i recently installed Fail2Ban. but i'm still recieving "Brute-Force attack" email from directadmin. my jail.conf (only the auth.log jails!): [ssh] enabled ...
1
vote
1answer
273 views

Fail2ban on centos 7 does not add rule to firewall. Firewall-cmd used on system

I installed the latest fail2ban from centos/epel I have added the ssh enabled option in jail.local. I have tried with action and banaction = firewallcmd-ipset neither made any difference. ...
5
votes
2answers
5k views

Custom fail2ban Filter for phpMyadmin bruteforce attempts

In my quest to block excessive failed phpMyAdmin login attempts with fail2ban, I've created a script that logs said failed attempts to a file: /var/log/phpmyadmin_auth.log Custom log The format of ...
1
vote
0answers
116 views

What this error means on Fail2ban?

I've installed fail2ban on my server. Anyway, I've seen this error on Fail2ban Log... What does it means? Here's the error 2015-02-09 06:11:21,076 fail2ban.filter [23563]: INFO ...
1
vote
1answer
251 views

How to interpret postfix logs on Ubuntu

I just installed postfix on my server which runs Ubuntu 14.04.1 LTS. I am a little confused as to how I should interpret the postfix logs located at /var/log/mail.log. Firstly, one of the reasons I ...
4
votes
4answers
1k views

Sharing of fail2ban banned IPs

I'm using fail2ban on all servers with publicly visible services and I wonder: Is there an easy way to share banned IPs between hosts I control? Is there a service out there collecting and ...
1
vote
2answers
456 views

fail2ban error on setting iptables on Synology NAS

I setup fail2ban 0.9.1 on my Synology NAS to handle failed SSH attempts. When I startup the jail I get the following errors in fail2ban.log: 2015-02-01 17:22:52,394 fail2ban.jail [30576]: ...
0
votes
1answer
1k views

Fail2ban doesn't start [closed]

I've done some changes to the file /etc/fail2ban/jail.local (a copy of /etc/fail2ban/jail.conf) and saved, but now fail2ban doesn't start. If I erase jail.local, then it start again. So the problem is ...
0
votes
1answer
565 views

Have fail2ban client and server on different machines

I was wondering if it was possible to have fail2ban clients on different machines and have a server on one machine communicating with all the clients? Here's my situation: I have 4 servers and I'm ...
0
votes
1answer
291 views

Writing a fail2ban multiline regex

I've got some troublesome hosts trying it on with an SSH server I run, and I'm trying to ban them using fail2ban. Problem is, I haven't done much work with regexes, and even less with Python regexes. ...
0
votes
2answers
347 views

Fail2Ban Regex - Joomla / PHP5-FPM

i can't get a regex for fail2ban to work. I want to match the following: [Tue Jun 24 10:22:14.528987 2014] [fcgid:warn] [pid 22526:tid 139757615011584] [client IP:PORT] mod_fcgid: stderr: user admin ...
2
votes
1answer
88 views

fail2ban did not ban anything, regardless of the settings

this is the first time that i did not find a solution here. so, hopefully it can be solved. i've installed a fresh, new ubuntu minimal system (14.04) with ssh on it. Right after that i installed ...
1
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2answers
155 views

Fail2ban maxretry meaning

I'm reading the following page to set up fail2ban on my Ubuntu server: https://help.ubuntu.com/community/Fail2ban In the "Configuration" section, it shows the following settings: [DEFAULT] # ...
6
votes
6answers
9k views

Stop fail2ban stop/start notifications

If the server is restarted, or even if fail2ban is stopped/start it sends a notification. [asterisk-iptables] enabled = true filter = asterisk action = iptables-allports[name=ASTERISK, ...
1
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0answers
165 views

Apache blocking based on combination of ip, request and useragent - Can fail2ban do that?

3 times over the past 48 hours, we had about a 6X spike in traffic lasting a few hours. The server handled it each time, but just barely. This was almost all bad-bot traffic (or maybe failed DOS ...
-9
votes
3answers
2k views

make fail2ban use public blacklists [closed]

I've been searching high and low for a way to connect fail2ban with blocklist.de (or any other public blacklists, for that matter, as long as fail2ban can report to it). Pretty much every result that ...
3
votes
1answer
77 views

What is the purpose of the _daemon directive in fail2ban?

A number of the filters that come with fail2ban have a _daemon directive, but there is no mention of it in the documentation and no reference to it in any of my jail definitions. What's it for?
0
votes
1answer
131 views

Fail2ban detects attempts from permanently banned IPs

I have a VM with a custom firewall script and Fail2ban. I've identified some IP ranges that make permanent intrusion attempts so I blocked them directly in my firewall script. Here is a simplified ...
3
votes
1answer
620 views

How do I automatically ban udp short packet with fail2ban?

This logfile /var/log/kern.log contains some IP addresses, which I would like the system to automatically ban/block. Basicaly, a packet is from the UDP protocol, and is a short packet, then I would ...
9
votes
3answers
1k views

Banning IPv6 addresses

I am currently accustomed to using tools like fail2ban to keep unwanted traffic away from my servers by banning IPv4 addresses: too many bad log entries per IP, ban the IP. However when the world ...
0
votes
1answer
226 views

Configuring varnish to write an apache error log with IP addresses

I am in the process of installing fail2ban on a webserver which runs Varnish. Many on the 'jails' require access to the apache/php error logs. One of the problems I have is that all of the refernces ...
0
votes
1answer
104 views

Fail2Ban: I'm having trouble creating a regex for my Dovecot filter

I am trying to create a regex filter for my failed Dovecot entries in the maillog file. What I have created is: .*dovecot: auth: sql\(.*,<HOST>\): Password mismatch The target line in the ...
0
votes
2answers
57 views

Massive blockingof ips done right

I run a website which is being abused every day with bots trying to send spam, not respecting robots.txt and so on. The biggest problem, however is repeating attempts to massively harvest website. ...
0
votes
0answers
67 views

Fail2ban apache-myadmin regex

I've got a jail set up with the following regex, which I took from a standard filter file: apache-myadmin.conf failregex = ^[[]client <HOST>[]] File does not exist: *myadmin* *\s*$ ...
1
vote
2answers
69 views

fail2ban with static IP

Is there any point to running fail2ban to protect your SSH connection if you connect from a static IP? As far as I can see having fail2ban running means that you effectively open up port 22 to ...
1
vote
1answer
1k views

How to ban Syn Flood Attacks using Fail2Ban?

In my log, I am frequently seeing dropped ips like this: > Oct 30 17:32:24 IPTables Dropped: IN=eth0 OUT= > MAC=04:01:2b:bd:b0:01:4c:96:14:ff:df:f0:08:00 SRC=62.210.94.116 > ...
1
vote
2answers
118 views

Use Fail2ban to block proxied dovecot password attempts

I've searched around a great deal with this, but can't manage to come up with a solution. The easiest way of explaining it, is I used to have just 1 email server, now I have 2. The 1st email server ...
7
votes
2answers
236 views

How to *add* rules in local fail2ban filter definition?

I have installed fail2ban as packaged by Debian on a server under my control. Since I have some failregexes from before, I'm putting those into the local filter definition file so they will be ...
1
vote
0answers
594 views

Fail2Ban Correctly Attempts to Ban IP but IP does not get banned - iptables chain exists but not working

Running on Ubuntu 14.04 Server. So I have fail2ban correctly configured to process /var/log/auth.log for SSH login attempts. Upon 3 failed attempts I see this in the fail2ban log: 2014-11-19 ...
1
vote
1answer
104 views

Debian Fail2ban action.d and filter.d scripts

I have a debian wheezy server on which I use Fail2ban that was loaded with the package installer. I noticed that while the version on my server (0.8.6-3wheezy3) is current, it does not match up with ...
0
votes
3answers
1k views

fail2ban error about python?

I have just installed fail2ban on my debian7 machine but whenever i start it i get a lot of error which seems to be about python? [....] Restarting authentication failure monitor: fail2banTraceback ...
1
vote
1answer
91 views

Debian port(s) not responding

I am fairly new to servers. I am trying to run a shoutcast server on debian. Shoutcast runs on a default port of 8000. My problem is it will not load when visiting xxx.xxx.xx.xxx:8000. When I log in ...
0
votes
1answer
230 views

Fail2ban does not ban any ip-adresses with vsftpd

Fail2ban starts okey. It work with my sshd filter and bans IP-adresses as it should. But with vsftpd it does not register failed logins when I run: fail2ban-client status vsftpd I have tried both ...
1
vote
0answers
121 views

Is fail2ban working?

I recently installed 2 new servers with Centos 7. I have enabled fail2ban with defaults. I have ensured it is running as ps -ax | grep fail2ban yields: 1996 ? S 0:04 /usr/bin/python ...
0
votes
1answer
2k views

Fail2ban MTA=Postfix Setting in Jail Config giving Error

In /etc/fail2ban/jail.local, when I have the MTA setting to Postfix, Fail2Ban is showing an error and is unable to start. [DEFAULT] ignoreip = 127.0.0.1/8 bantime = 1800 ...
1
vote
0answers
128 views

What does Nginx Proxy Filter in Fail2ban really do?

What does Nginx Proxy Filter in Fail2ban really do? I am currently setting up Fail2Ban for Nginx. Almost everywhere I've read, they all have included a setting for [nginx-proxy] proxy filter. From ...
3
votes
1answer
2k views

Fail2ban jail.local vs jail.conf

Does jail.local file act as an override to jail.conf or as a replacement to jail.conf? When I was learning about Fail2Ban from tutorials, most of them usually say either to copy jail.conf to ...
1
vote
1answer
181 views

fail2ban flushing my existing IPTABLES rules

I just implemented fail2ban on a server for testing purposes. I have a BLACKLIST chain which blocks a huge set of CIDR masks that I don't want to reach my server. When fail2ban is triggered by a ...
0
votes
1answer
157 views

Fail2ban not working on Ubuntu 12.04

I'm trying to implement fail2ban on a Ubuntu 12.04 x64 server. I've done the following: apt-get install fail2ban Made a copy of jail.conf in /etc/fail2ban/jail.conf.local here's an excerpt: ...
1
vote
1answer
4k views

fail2ban running on CentOS 7 & getting “ssh connection refused”

Is anyone successfully running fail2ban on CentOS 7 and can tell me how to do it? I tried to install fail2ban with yum install fail2ban and run it (there are no extra rules in iptables -L which seems ...
5
votes
4answers
2k views

How to block all root login attempts using denyhosts and or fail2ban?

I currently block all ssh logins using root. But I wanted to go the extra mile and block the ip address of the client who tried to login as root. I currently have denyhosts and fail2ban setup and ...