Index: fail2ban/config/paths-debian.conf
===================================================================
--- fail2ban.orig/config/paths-debian.conf
+++ fail2ban/config/paths-debian.conf
@@ -28,3 +28,14 @@ exim_main_log = /var/log/exim4/mainlog
 proftpd_log = /var/log/proftpd/proftpd.log
 
 roundcube_errors_log = /var/log/roundcube/errors.log
+
+# In Debian, these services will log to the journal via syslog, so use the
+# journal by default.
+syslog_backend = systemd
+sshd_backend = systemd
+dropbear_backend = systemd
+proftpd_backend = systemd
+pureftpd_backend = systemd
+wuftpd_backend = systemd
+postfix_backend = systemd
+dovecot_backend = systemd