This does not fix it for me and still doesn’t start. Journalctl -xe output:
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has finished shutting down.
Aug 04 15:16:33 PBXphoneSystem systemd[1]: Starting Fail2Ban Service...
-- Subject: Unit fail2ban.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has begun starting up.
Aug 04 15:16:33 PBXphoneSystem fail2ban-client[12677]: ERROR Found no accessible config files for 'filter.d/zulu' under /etc/fail2ban
Aug 04 15:16:33 PBXphoneSystem fail2ban-client[12677]: ERROR Unable to read the filter
Aug 04 15:16:33 PBXphoneSystem fail2ban-client[12677]: ERROR Errors in jail 'zulu'. Skipping...
Aug 04 15:16:33 PBXphoneSystem systemd[1]: fail2ban.service: control process exited, code=exited status=255
Aug 04 15:16:33 PBXphoneSystem systemd[1]: Failed to start Fail2Ban Service.
-- Subject: Unit fail2ban.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has failed.
--
-- The result is failed.
Aug 04 15:16:33 PBXphoneSystem systemd[1]: Unit fail2ban.service entered failed state.
Aug 04 15:16:33 PBXphoneSystem systemd[1]: fail2ban.service failed.
Aug 04 15:16:33 PBXphoneSystem systemd[1]: fail2ban.service holdoff time over, scheduling restart.
Aug 04 15:16:33 PBXphoneSystem systemd[1]: Stopped Fail2Ban Service.
-- Subject: Unit fail2ban.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has finished shutting down.
Aug 04 15:16:33 PBXphoneSystem systemd[1]: Starting Fail2Ban Service...
-- Subject: Unit fail2ban.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has begun starting up.
Aug 04 15:16:34 PBXphoneSystem fail2ban-client[12681]: ERROR Found no accessible config files for 'filter.d/zulu' under /etc/fail2ban
Aug 04 15:16:34 PBXphoneSystem fail2ban-client[12681]: ERROR Unable to read the filter
Aug 04 15:16:34 PBXphoneSystem fail2ban-client[12681]: ERROR Errors in jail 'zulu'. Skipping...
Aug 04 15:16:34 PBXphoneSystem systemd[1]: fail2ban.service: control process exited, code=exited status=255
Aug 04 15:16:34 PBXphoneSystem systemd[1]: Failed to start Fail2Ban Service.
-- Subject: Unit fail2ban.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has failed.
--
-- The result is failed.
Aug 04 15:16:34 PBXphoneSystem systemd[1]: Unit fail2ban.service entered failed state.
Aug 04 15:16:34 PBXphoneSystem systemd[1]: fail2ban.service failed.
Aug 04 15:16:34 PBXphoneSystem systemd[1]: fail2ban.service holdoff time over, scheduling restart.
Aug 04 15:16:34 PBXphoneSystem systemd[1]: Stopped Fail2Ban Service.
-- Subject: Unit fail2ban.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has finished shutting down.
Aug 04 15:16:34 PBXphoneSystem systemd[1]: start request repeated too quickly for fail2ban.service
Aug 04 15:16:34 PBXphoneSystem systemd[1]: Failed to start Fail2Ban Service.
-- Subject: Unit fail2ban.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit fail2ban.service has failed.
--
-- The result is failed.
Aug 04 15:16:34 PBXphoneSystem systemd[1]: Unit fail2ban.service entered failed state.
Aug 04 15:16:34 PBXphoneSystem systemd[1]: fail2ban.service failed.