clopez2007 Gracias por responder!
Te copio la salida:
[root@issabel ~]# /usr/bin/fail2ban-client -v -v start
2020-01-09 08:17:13,634 7FCA3806D740 INFO Loading configs for fail2ban under /etc/fail2ban
2020-01-09 08:17:13,634 7FCA3806D740 DEBUG Reading configs for fail2ban under /etc/fail2ban
2020-01-09 08:17:13,635 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/fail2ban.conf
2020-01-09 08:17:13,635 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/fail2ban.conf']
2020-01-09 08:17:13,636 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/fail2ban.conf']
2020-01-09 08:17:13,636 7FCA3806D740 INFO Using socket file /var/run/fail2ban/fail2ban.sock
2020-01-09 08:17:13,636 7FCA3806D740 INFO Using pid file /var/run/fail2ban/fail2ban.pid, [INFO] logging to /var/log/fail2ban.log
2020-01-09 08:17:13,637 7FCA3806D740 INFO Loading configs for jail under /etc/fail2ban
2020-01-09 08:17:13,637 7FCA3806D740 DEBUG Reading configs for jail under /etc/fail2ban
2020-01-09 08:17:13,637 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/jail.conf, /etc/fail2ban/jail.d/00-firewalld.conf, /etc/fail2ban/jail.d/issabel.conf
2020-01-09 08:17:13,637 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/jail.conf']
2020-01-09 08:17:13,645 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/paths-fedora.conf']
2020-01-09 08:17:13,646 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/paths-common.conf']
2020-01-09 08:17:13,647 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/paths-overrides.local']
2020-01-09 08:17:13,647 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/jail.d/00-firewalld.conf']
2020-01-09 08:17:13,647 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/jail.d/issabel.conf']
2020-01-09 08:17:13,649 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/paths-common.conf', '/etc/fail2ban/paths-fedora.conf', '/etc/fail2ban/jail.conf', '/etc/fail2ban/jail.d/00-firewalld.conf', '/etc/fail2ban/jail.d/issabel.conf']
2020-01-09 08:17:13,654 7FCA3806D740 INFO Loading configs for filter.d/sshd under /etc/fail2ban
2020-01-09 08:17:13,654 7FCA3806D740 DEBUG Reading configs for filter.d/sshd under /etc/fail2ban
2020-01-09 08:17:13,654 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/sshd.conf
2020-01-09 08:17:13,654 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/sshd.conf']
2020-01-09 08:17:13,655 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf']
2020-01-09 08:17:13,656 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.local']
2020-01-09 08:17:13,656 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/sshd.conf']
2020-01-09 08:17:13,661 7FCA3806D740 INFO Loading configs for action.d/firewallcmd-ipset under /etc/fail2ban
2020-01-09 08:17:13,662 7FCA3806D740 DEBUG Reading configs for action.d/firewallcmd-ipset under /etc/fail2ban
2020-01-09 08:17:13,662 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/action.d/firewallcmd-ipset.conf
2020-01-09 08:17:13,662 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/action.d/firewallcmd-ipset.conf']
2020-01-09 08:17:13,667 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/action.d/firewallcmd-common.conf']
2020-01-09 08:17:13,669 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/action.d/firewallcmd-common.conf', '/etc/fail2ban/action.d/firewallcmd-ipset.conf']
2020-01-09 08:17:13,671 7FCA3806D740 INFO Loading configs for filter.d/apache-auth under /etc/fail2ban
2020-01-09 08:17:13,671 7FCA3806D740 DEBUG Reading configs for filter.d/apache-auth under /etc/fail2ban
2020-01-09 08:17:13,671 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-auth.conf
2020-01-09 08:17:13,671 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-auth.conf']
2020-01-09 08:17:13,672 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-common.conf']
2020-01-09 08:17:13,672 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-common.local']
2020-01-09 08:17:13,672 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/apache-common.conf', '/etc/fail2ban/filter.d/apache-auth.conf']
2020-01-09 08:17:13,675 7FCA3806D740 INFO Loading configs for filter.d/apache-badbots under /etc/fail2ban
2020-01-09 08:17:13,676 7FCA3806D740 DEBUG Reading configs for filter.d/apache-badbots under /etc/fail2ban
2020-01-09 08:17:13,676 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-badbots.conf
2020-01-09 08:17:13,676 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-badbots.conf']
2020-01-09 08:17:13,676 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-badbots.conf']
2020-01-09 08:17:13,679 7FCA3806D740 INFO Loading configs for filter.d/apache-noscript under /etc/fail2ban
2020-01-09 08:17:13,679 7FCA3806D740 DEBUG Reading configs for filter.d/apache-noscript under /etc/fail2ban
2020-01-09 08:17:13,679 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-noscript.conf
2020-01-09 08:17:13,679 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-noscript.conf']
2020-01-09 08:17:13,680 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/apache-common.conf', '/etc/fail2ban/filter.d/apache-noscript.conf']
2020-01-09 08:17:13,683 7FCA3806D740 INFO Loading configs for filter.d/apache-overflows under /etc/fail2ban
2020-01-09 08:17:13,683 7FCA3806D740 DEBUG Reading configs for filter.d/apache-overflows under /etc/fail2ban
2020-01-09 08:17:13,683 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-overflows.conf
2020-01-09 08:17:13,683 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-overflows.conf']
2020-01-09 08:17:13,683 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/apache-common.conf', '/etc/fail2ban/filter.d/apache-overflows.conf']
2020-01-09 08:17:13,686 7FCA3806D740 INFO Loading configs for filter.d/apache-nohome under /etc/fail2ban
2020-01-09 08:17:13,686 7FCA3806D740 DEBUG Reading configs for filter.d/apache-nohome under /etc/fail2ban
2020-01-09 08:17:13,686 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-nohome.conf
2020-01-09 08:17:13,686 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-nohome.conf']
2020-01-09 08:17:13,687 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/apache-common.conf', '/etc/fail2ban/filter.d/apache-nohome.conf']
2020-01-09 08:17:13,689 7FCA3806D740 INFO Loading configs for filter.d/apache-botsearch under /etc/fail2ban
2020-01-09 08:17:13,690 7FCA3806D740 DEBUG Reading configs for filter.d/apache-botsearch under /etc/fail2ban
2020-01-09 08:17:13,690 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-botsearch.conf
2020-01-09 08:17:13,690 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-botsearch.conf']
2020-01-09 08:17:13,691 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/botsearch-common.conf']
2020-01-09 08:17:13,691 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/apache-common.conf', '/etc/fail2ban/filter.d/botsearch-common.conf', '/etc/fail2ban/filter.d/apache-botsearch.conf']
2020-01-09 08:17:13,694 7FCA3806D740 INFO Loading configs for filter.d/apache-fakegooglebot under /etc/fail2ban
2020-01-09 08:17:13,694 7FCA3806D740 DEBUG Reading configs for filter.d/apache-fakegooglebot under /etc/fail2ban
2020-01-09 08:17:13,694 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-fakegooglebot.conf
2020-01-09 08:17:13,694 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-fakegooglebot.conf']
2020-01-09 08:17:13,695 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-fakegooglebot.conf']
2020-01-09 08:17:13,697 7FCA3806D740 INFO Loading configs for filter.d/apache-modsecurity under /etc/fail2ban
2020-01-09 08:17:13,697 7FCA3806D740 DEBUG Reading configs for filter.d/apache-modsecurity under /etc/fail2ban
2020-01-09 08:17:13,697 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-modsecurity.conf
2020-01-09 08:17:13,697 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-modsecurity.conf']
2020-01-09 08:17:13,698 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/apache-common.conf', '/etc/fail2ban/filter.d/apache-modsecurity.conf']
2020-01-09 08:17:13,700 7FCA3806D740 INFO Loading configs for filter.d/apache-shellshock under /etc/fail2ban
2020-01-09 08:17:13,700 7FCA3806D740 DEBUG Reading configs for filter.d/apache-shellshock under /etc/fail2ban
2020-01-09 08:17:13,700 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/apache-shellshock.conf
2020-01-09 08:17:13,700 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/apache-shellshock.conf']
2020-01-09 08:17:13,701 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/apache-common.conf', '/etc/fail2ban/filter.d/apache-shellshock.conf']
2020-01-09 08:17:13,706 7FCA3806D740 INFO Loading configs for filter.d/postfix under /etc/fail2ban
2020-01-09 08:17:13,706 7FCA3806D740 DEBUG Reading configs for filter.d/postfix under /etc/fail2ban
2020-01-09 08:17:13,706 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/postfix.conf
2020-01-09 08:17:13,706 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/postfix.conf']
2020-01-09 08:17:13,707 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/postfix.conf']
2020-01-09 08:17:13,717 7FCA3806D740 INFO Loading configs for filter.d/asterisk under /etc/fail2ban
2020-01-09 08:17:13,717 7FCA3806D740 DEBUG Reading configs for filter.d/asterisk under /etc/fail2ban
2020-01-09 08:17:13,717 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/asterisk.conf
2020-01-09 08:17:13,717 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/asterisk.conf']
2020-01-09 08:17:13,718 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/asterisk.conf']
2020-01-09 08:17:13,722 7FCA3806D740 INFO Loading configs for action.d/sendmail-whois under /etc/fail2ban
2020-01-09 08:17:13,722 7FCA3806D740 DEBUG Reading configs for action.d/sendmail-whois under /etc/fail2ban
2020-01-09 08:17:13,722 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/action.d/sendmail-whois.conf
2020-01-09 08:17:13,722 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/action.d/sendmail-whois.conf']
2020-01-09 08:17:13,723 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/action.d/sendmail-common.conf']
2020-01-09 08:17:13,723 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/action.d/sendmail-common.local']
2020-01-09 08:17:13,724 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/action.d/sendmail-common.conf', '/etc/fail2ban/action.d/sendmail-whois.conf']
2020-01-09 08:17:13,726 7FCA3806D740 INFO Loading configs for filter.d/sshd-ddos under /etc/fail2ban
2020-01-09 08:17:13,727 7FCA3806D740 DEBUG Reading configs for filter.d/sshd-ddos under /etc/fail2ban
2020-01-09 08:17:13,727 7FCA3806D740 ERROR Found no accessible config files for 'filter.d/sshd-ddos' under /etc/fail2ban
2020-01-09 08:17:13,727 7FCA3806D740 ERROR Unable to read the filter 'sshd-ddos'
2020-01-09 08:17:13,727 7FCA3806D740 ERROR Errors in jail 'sshd-ddos'. Skipping...
2020-01-09 08:17:13,727 7FCA3806D740 INFO Loading configs for filter.d/asterisk-ami under /etc/fail2ban
2020-01-09 08:17:13,727 7FCA3806D740 DEBUG Reading configs for filter.d/asterisk-ami under /etc/fail2ban
2020-01-09 08:17:13,728 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/asterisk-ami.conf
2020-01-09 08:17:13,728 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/asterisk-ami.conf']
2020-01-09 08:17:13,728 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/asterisk-ami.conf']
2020-01-09 08:17:13,731 7FCA3806D740 INFO Loading configs for filter.d/issabel-gui under /etc/fail2ban
2020-01-09 08:17:13,731 7FCA3806D740 DEBUG Reading configs for filter.d/issabel-gui under /etc/fail2ban
2020-01-09 08:17:13,731 7FCA3806D740 DEBUG Reading config files: /etc/fail2ban/filter.d/issabel-gui.conf
2020-01-09 08:17:13,732 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/issabel-gui.conf']
2020-01-09 08:17:13,732 7FCA3806D740 INFO Loading files: ['/etc/fail2ban/filter.d/common.conf', '/etc/fail2ban/filter.d/issabel-gui.conf']
2020-01-09 08:17:13,746 7FCA3806D740 NOTIC No file(s) found for glob /var/log/asterisk/messages
2020-01-09 08:17:13,746 7FCA3806D740 ERROR Failed during configuration: Have not found any log file for asterisk jail
2020-01-09 08:17:13,746 7FCA3806D740 DEBUG Exit with code 255