Hello, I would like to ask for help. I had pretty well configured iptables with fail2ban rulez, but suddenly iptables are empty - but completly. Code: root@root:~# iptables -L root@root:~# ip6tables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination As you can see, ip6tables do some response but iptables -L does nothing I was used to save iptables before reboot to file manualy, but I set crontab daily backup script Code: !/bin/bash iptables-save > /etc/iptables.rules Code: :~$ ls -l /sbin/iptables lrwxrwxrwx 1 root root 13 Mar 1 2013 /sbin/iptables -> xtables-multi and it seems from now it does nothing. I even tried to uninstall iptables package and install it again but without success. Is there a way how to fix this? Thanks EDIT: problem solved : as I wrote ... i had this script in usr/local/bin/iptablessave and in crontab ... it seems it was renewing the file all the time so it blocked normal iptables.