PVE 8.0 – fail2ban log locations missing?

[MilesTEG1]

Hello,
I am struggling to have a fail2ban working on my PVE 8.2.
I have done all the things explained here for the systemd backend.
Fail2ban starts correctly for one of the two action value:

action = %(action_)s
action = %(action_mw)s

But not for this action:

action = %(action_mwl)s

I've got this message :

╰ /usr/bin/fail2ban-server -xf start
2024-07-05 09:06:24,056 fail2ban.configreader   [2906043]: WARNING 'allowipv6' not defined in 'Definition'. Using default one: 'auto'
2024-07-05 09:06:24,061 fail2ban                [2906043]: ERROR   Failed during configuration: Bad value substitution: option 'action' in section 'proxmox' contains an interpolation key 'logpath' which is not a valid option name. Raw value: '%(action_mwl)s'
2024-07-05 09:06:24,063 fail2ban                [2906043]: ERROR   Async configuration of server failed

I've look into my filter.d/proxmox.conf :

[INCLUDES]
before = common.conf

[Definition]
failregex = pvedaemon\[.*authentication failure; rhost=<HOST> user=.* msg=.*

ignoreregex =
journalmatch = _SYSTEMD_UNIT=pvedaemon.service

There is no logpath and with the same filter.d/proxmox.conf but with action = %(action_mw)s fail2ban starts normally.
So this is an issue with the mail to send and a logpath there.
The only file regardin sending email I found in which there is a logpah is : sendmail-whois-lines.conf
I've personalized this one in a sendmail-whois-lines.local:

## Version 2022/08/06
# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
#

[INCLUDES]

before = sendmail-common.conf
         mail-whois-common.conf
         helpers-common.conf

[Definition]

# bypass ban/unban for restored tickets
norestored = 1

# Option:  actionban
# Notes.:  command executed when banning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    See jail.conf(5) man page
# Values:  CMD
#
actionban = ( printf %%b "Subject: [Fail2Ban (PVE - Nuc Geekom Mini-IT13)] <name>: banned <ip> from <fq-hostname>
            Date: `LC_ALL=C date +"%%a, %%d %%h %%Y %%T %%z"`
            From: <sendername> <<sender>>
            To: <dest>\n
            Hi,\n
            The IP <ip> has just been banned by Fail2Ban after
            <failures> attempts against <name>.\n\n
            Here is more information about <ip> :\n"
            %(_whois_command)s;
            printf %%b "\nLines containing failures of <ip> (max <grepmax>)\n";
            %(_grep_logs)s;
            printf %%b "\n
            Regards,\n
            Fail2Ban (PVE - Nuc Geekom Mini-IT13)" ) | <mailcmd>

[Init]

# Default name of the chain
#
name = default

# Path to the log files which contain relevant lines for the abuser IP
#
logpath = /dev/null

# Number of log lines to include in the email
#
#grepmax = 1000
#grepopts = -m <grepmax>

Does someone know how to fix this error I get when I start fail2ban?


PS: Whatever I set the allowipv6, I got always the message:

 WARNING 'allowipv6' not defined in 'Definition'. Using default one: 'auto'

Is there a way to no have this?

Thanks in advance.
Miles