☰

针对 phpMyadmin 暴力破解尝试的自定义 fail2ban 过滤器

tag-icon • tag-icon security configuration fail2ban
针对 phpMyadmin 暴力破解尝试的自定义 fail2ban 过滤器

为了阻止过多的phpMyAdmin登录失败尝试fail2ban，我创建了一个脚本，将上述失败尝试记录到文件中：/var/log/phpmyadmin_auth.log

自定义日志

该文件的格式/var/log/phpmyadmin_auth.log为：

phpMyadmin login failed with username: root; ip: 192.168.1.50; url: http://somedomain.com/phpmyadmin/index.php
phpMyadmin login failed with username: ; ip: 192.168.1.50; url: http://192.168.1.48/phpmyadmin/index.php

自定义过滤器

[Definition]

# Count all bans in the logfile
failregex = phpMyadmin login failed with username: .*; ip: <HOST>;

phpMyAdmin 监狱

[phpmyadmin]

enabled  = true
port    = http,https
filter   = phpmyadmin
action   = sendmail-whois[name=HTTP]
logpath  = /var/log/phpmyadmin_auth.log
maxretry = 6

日志fail2ban内容如下：

2012-10-04 10:52:22,756 fail2ban.server : INFO   Stopping all jails
2012-10-04 10:52:23,091 fail2ban.jail   : INFO   Jail 'ssh-iptables' stopped
2012-10-04 10:52:23,866 fail2ban.jail   : INFO   Jail 'fail2ban' stopped
2012-10-04 10:52:23,994 fail2ban.jail   : INFO   Jail 'ssh' stopped
2012-10-04 10:52:23,994 fail2ban.server : INFO   Exiting Fail2ban
2012-10-04 10:52:24,253 fail2ban.server : INFO   Changed logging target to /var/log/fail2ban.log for Fail2ban v0.8.6
2012-10-04 10:52:24,253 fail2ban.jail   : INFO   Creating new jail 'ssh'
2012-10-04 10:52:24,253 fail2ban.jail   : INFO   Jail 'ssh' uses poller
2012-10-04 10:52:24,260 fail2ban.filter : INFO   Added logfile = /var/log/auth.log
2012-10-04 10:52:24,260 fail2ban.filter : INFO   Set maxRetry = 6
2012-10-04 10:52:24,261 fail2ban.filter : INFO   Set findtime = 600
2012-10-04 10:52:24,261 fail2ban.actions: INFO   Set banTime = 600
2012-10-04 10:52:24,279 fail2ban.jail   : INFO   Creating new jail 'ssh-iptables'
2012-10-04 10:52:24,279 fail2ban.jail   : INFO   Jail 'ssh-iptables' uses poller
2012-10-04 10:52:24,279 fail2ban.filter : INFO   Added logfile = /var/log/auth.log
2012-10-04 10:52:24,280 fail2ban.filter : INFO   Set maxRetry = 5
2012-10-04 10:52:24,280 fail2ban.filter : INFO   Set findtime = 600
2012-10-04 10:52:24,280 fail2ban.actions: INFO   Set banTime = 600
2012-10-04 10:52:24,287 fail2ban.jail   : INFO   Creating new jail 'fail2ban'
2012-10-04 10:52:24,287 fail2ban.jail   : INFO   Jail 'fail2ban' uses poller
2012-10-04 10:52:24,287 fail2ban.filter : INFO   Added logfile = /var/log/fail2ban.log
2012-10-04 10:52:24,287 fail2ban.filter : INFO   Set maxRetry = 3
2012-10-04 10:52:24,288 fail2ban.filter : INFO   Set findtime = 604800
2012-10-04 10:52:24,288 fail2ban.actions: INFO   Set banTime = 604800
2012-10-04 10:52:24,292 fail2ban.jail   : INFO   Jail 'ssh' started
2012-10-04 10:52:24,293 fail2ban.jail   : INFO   Jail 'ssh-iptables' started
2012-10-04 10:52:24,297 fail2ban.jail   : INFO   Jail 'fail2ban' started

当我发出：

sudo service fail2ban restart

fail2ban给我发邮件说ssh已重新启动，但我没有收到有关我的phpmyadminjail 的电子邮件。多次登录失败phpMyAdmin不会导致发送电子邮件。

我是否遗漏了一些关键设置？我的过滤器的正则表达式是否错误？

更新：添加了默认安装的更改

从全新fail2ban安装开始：

cp /etc/fail2ban/jail.conf /etc/fail2ban/jail.local

将邮箱地址改为我自己的，操作为：

action = %(action_mwl)s

将以下内容附加到jail.local

[phpmyadmin]

enabled  = true
port     = http,https
filter   = phpmyadmin
action   = sendmail-whois[name=HTTP]
logpath  = /var/log/phpmyadmin_auth.log
maxretry = 4

将以下内容添加到/etc/fail2ban/filter.d/phpmyadmin.conf

# phpmyadmin configuration file
#
# Author: Michael Robinson
#

[Definition]

# Option:  failregex
# Notes.:  regex to match the password failures messages in the logfile. The
#          host must be matched by a group named "host". The tag "<HOST>" can
#          be used for standard IP/hostname matching and is only an alias for
#          (?:::f{4,6}:)?(?P<host>\S+)
# Values:  TEXT
#

# Count all bans in the logfile
failregex = phpMyadmin login failed with username: .*; ip: <HOST>;

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#

# Ignore our own bans, to keep our counts exact.
# In your config, name your jail 'fail2ban', or change this line!
ignoreregex =

重新开始fail2ban

sudo service fail2ban restart

附言：我喜欢鸡蛋

答案1

这很好，但是为什么不使用 apache 功能来记录失败的登录呢？

将这些行添加到您的 Apache 配置（即：/etc/apache2/conf.d/phpmyadmin.conf）中的相应 VirtualHost 部分：

LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %{userID}n %{userStatus}n" pma_combined
CustomLog /var/log/apache2/phpmyadmin_access.log pma_combined

然后创建 fail2ban 过滤器：

/etc/fail2ban/filter.d/phpmyadmin.conf

[Definition]
denied = mysql-denied|allow-denied|root-denied|empty-denied
failregex = ^<HOST> -.*(?:%(denied)s)$
ignoreregex =

现在将 jail 添加到 /etc/fail2ban/jail.local

[phpmyadmin]
enabled = true
port = http,https
filter = phpmyadmin
logpath = /var/log/apache2/phpmyadmin_access.log

重新启动 apache 和 fail2ban：

service  apache2 reload
service fail2ban reload

您已完成，不再需要 php 脚本等等。

答案2

  1. 你应该修改脚本，在日志文件中包含时间戳。否则，fail2ban 将无法工作

  2. 首先用来fail2ban-regex /var/log/phpmyadmin_auth.log /etc/fail2ban/filter.d/phpmyadmin.conf验证你的正则表达式。

  3. 我可以使用您原来的配置（jail.local 之前）成功启动 fail2ban

    Oct  7 00:42:07 hostname yum: Installed: python-inotify-0.9.1-1.el5.noarch 
Oct  7 00:42:08 hostname yum: Installed: fail2ban-0.8.4-29.el5.noarch
Oct  7 00:42:10 hostname yum: Installed: phpMyAdmin-2.11.11.3-2.el5.noarch
Oct  7 01:01:03 hostname fail2ban.server : INFO   Changed logging target to SYSLOG for Fail2ban v0.8.4
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Creating new jail 'phpmyadmin'
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' uses Gamin
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set maxRetry = 2
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set findtime = 600
Oct  7 01:01:03 hostname fail2ban.actions: INFO   Set banTime = 600
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Creating new jail 'ssh-iptables'
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'ssh-iptables' uses Gamin
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Added logfile = /var/log/secure
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set maxRetry = 5
Oct  7 01:01:03 hostname fail2ban.filter : INFO   Set findtime = 600
Oct  7 01:01:03 hostname fail2ban.actions: INFO   Set banTime = 600
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' started
Oct  7 01:01:03 hostname fail2ban.jail   : INFO   Jail 'ssh-iptables' started
Oct  7 01:10:54 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' stopped
Oct  7 01:10:55 hostname fail2ban.jail   : INFO   Jail 'ssh-iptables' stopped
Oct  7 01:10:55 hostname fail2ban.server : INFO   Exiting Fail2ban
Oct  7 01:10:56 hostname fail2ban.server : INFO   Changed logging target to SYSLOG for Fail2ban v0.8.4
Oct  7 01:10:56 hostname fail2ban.jail   : INFO   Creating new jail 'phpmyadmin'
Oct  7 01:10:56 hostname fail2ban.jail   : INFO   Jail 'phpmyadmin' uses Gamin
Oct  7 01:10:56 hostname fail2ban.filter : INFO   Added logfile = /var/log/phpmyadmin_auth.log

  4. 一旦正确的正则表达式到位，您可以使用审核来查看您的文件是否被 fail2ban 访问。

我用了auditctl -w /var/log/phpmyadmin_auth.log -p warx -k phpmyadmin_fail2ban

相关内容