Docker NCP with Fail2Ban

Hi,

IĀ“ve just installed raspbian on my Raspberry Pi 3b+.
Now NCP is running with docker and evertrhing works like it should.

Recently I did some configuration to the server settings for hardening
and lastly tried to setup fail2ban in combination with docker. I read the manual
found that I have to add a new filter and action file.

Unfortunately I couldnt find out exactly how these files should look like.

Can anyone help me out with this?

Thank you in advance.

My fail2ban filter for Nextcloud looks like this:

cat /etc/fail2ban/filter.d/nextcloud.conf
[INCLUDES]
before = common.conf
[Definition]
failregex = Login failed.Remote IP.ā€˜ā€™
ignoreregex =

Pasted my jail.local here

Youā€™ll need to comment out the ssh section in jail.local if sshd is not enabled.

Thank you for reply.

The filter for nextcloud looks very similar to yours with a few arguments more.
I think the problem lies within the nextcloud.conf file in ā€¦/fail2ban/action.d.
The input chain must be changed to forward chain in some ways. That is what I found
out with some research, but I couldnĀ“t get it to work.