Création du fichier freshrss.conf sous jail.d :

[freshrss-auth]
enabled  = true
port     = https,http
filter   = freshrss-auth
logpath  = /var/log/apache2/access.rss.casami.fr.log
maxretry = 1
bantime = 4h

Création du filtre freshrss-auth sous filter.d :

# filter for freshrss
#

[Definition]
failregex =  <HOST> - - \[.*\] "POST .*" 403
ignoreregex =

Quelques commandes utiles

sudo fail2ban-client status
sudo fail2ban-client status [Nom du jail]