Fail2Ban for logins
A Kimai plugin, which logs an error message for every failed login attempt to a dedicated logfile.
This logfile can be analyzed by fail2ban to block access and prevent authentication attacks.
Fail2Ban configurations
You should know how to use and configure fail2ban, we cannot help with that part!
Having said that, here are some possible rules for your fail2ban configuration.
First the Kimai specific filter:
#/etc/fail2ban/filter.d/kimai2.conf
[Definition]
failregex = fail2ban.ERROR: <HOST> \[.*\] \[.*\]$
And the additional jail.local for Kimai:
#/etc/fail2ban/jail.local
[kimai2]
enabled = true
filter = kimai2
logpath = /var/www/kimai2/var/log/fail2ban.log
port = http,https
bantime = 600
banaction = iptables-multiport
maxretry = 3
Now touch the file to make sure it exists:
touch /var/www/kimai2/var/log/fail2ban.log
Credits
- Bundle inspired by this blog entry
- Thanks also to @BeckeBauer for the idea and the initial try
- Find config documentation in the fail2ban wiki
The following table contains a comparison between plugin and required minimum Kimai version.
| Bundle version | Minimum Kimai version |
|---|---|
| 2.0 | 2.0 |
| 1.2 | 1.18 |
Copy files
Extract the ZIP file and upload the included directory and all files to your Kimai installation to the new directory:
var/plugins/Fail2BanBundle/The file structure needs to look like this afterwards:
var/plugins/
├── Fail2BanBundle
│ ├── Fail2BanBundle.php
| └ ... more files and directories follow here ...Clear cache
After uploading the files, Kimai needs to know about the new plugin. It will be found once the cache was re-built. Call these commands from the Kimai directory:
How to reload Kimai cache
bin/console kimai:reload --env=prodIt is not advised, but in case the above command fails you could try:
rm -r var/cache/prod/*You might have to set file permissions afterwards:
Adjust file permission
You have to allow PHP (your webserver process) to write to
var/ and it subdirectories.
Here is an example for Debian/Ubuntu (to be executed inside the Kimai directory):
chown -R :www-data .
chmod -R g+r .
chmod -R g+rw var/
Test Kimai before executing these commands (they are likely not required in a shared-hosting environment).
You probably need to prefix them with sudo and
the group might be called different than www-data.