On a CentOS 6.7 system that's been running fail2ban for a long time, we recently started seeing this: ct 28 19:00:59 <servername> fail2ban.action[17561]: ERROR iptables -w -D INPUT -p tcp --dport ssh -j f2b-SSH#012iptables -w -F f2b-SSH#012iptables -w -X f2b-SSH -- stderr: "iptables v1.4.7: option `-w' requires an argument\nTry `iptables -h' or 'iptables --help' for more information.\niptables v1.4.7: option `-w' requires an argument\nTry `iptables -h' or 'iptables --help' for more information.\niptables v1.4.7: option `-w' requires an argument\nTry `iptables -h' or 'iptables --help' for more information.\n" My manager thinks it might have been due to the recent update. I, however, am extremely confused, as in neither in the manpage, nore fail2ban --help, do I find *ANY* reference to a -w flag. Anyone have a clue here? mark