Hello, I recently upgraded my PC from F26 to F27, and noticed that fail2ban was not adding the configured chains to iptables. This worked fine at F26. There are no error messages in the log files (dmesg, /var/log/messages, /var/log/fail2ban.log). I have tried disabling SELinux, then restarting fail2ban but the chains still do not appear. I do not use firewalld so removed the fail2ban-firewalld package. I set the fail2ban log level to debug, and that showed the relevant iptables commands that would add the chains, but otherwise gave no indication of any error. (I used the logged iptables commands to manually add the chains, and all the commands worked fine.) If I log (using logger) appropriate log messages - such as an SSH failed authentication attempt - then that particular chain does appear in iptables. If I unban the logged IP address, then the chain remains in iptables. If I restart fail2ban, then the chain is no longer in iptables. I'm now a bit stumped as to what might be the problem. Anyone any ideas? Thanks, John. -- John Horne | Senior Operations Analyst | Technology and Information Services University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK ________________________________ [http://www.plymouth.ac.uk/images/email_footer.gif]<http://www.plymouth... This email and any files with it are confidential and intended solely for the use of the recipient to whom it is addressed. If you are not the intended recipient then copying, distribution or other use of the information contained is strictly prohibited and you should not rely on it. If you have received this email in error please let the sender know immediately and delete it from your system(s). Internet emails are not necessarily secure. While we take every care, Plymouth University accepts no responsibility for viruses and it is your responsibility to scan emails and their attachments. Plymouth University does not accept responsibility for any changes made after it was sent. Nothing in this email or its attachments constitutes an order for goods or services unless accompanied by an official order form.