Why not do as it suggests and add the -w switch to your iptables command?
On 16/11/2017 08:04, Robert Gilaard wrote:
Dear fail2ban Community, On my Ubuntu server 16.04 instance fail2ban keeps crashing and restarting. In my iptables-multiport.conf file under actionstart I have a Line to add a ip.blacklist file with fixed address that sshd OR other services feed. The command is exactly: cat /etc/fail2ban/ip.blacklist | while read IP; do iptables -I f2b-<name> 1 -s $ip -j DROP; done However, my ip.blacklist file has now already 63169 different ip addresses. Can this be the reason fail2ban-client status asks me if fail2ban is running and ufw status verbose tells me "Another app is currently holding the xtables lock. Perhaps you want to use the -w option? What can cause this? Robert
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