fail2ban log errors for ssh jail

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http://www.linuxquestions.org – Hello all, There is a server where fail2ban is installed. I can see the error in the log files repeatedly and do not know this is. Any help? Code: 2010-07-13 10:39:49,966 fail2ban.jail  : INFO  Jail 'ssh-iptables' started 2010-07-13 10:55:41,550 fail2ban.actions.action: ERROR  iptables -D INPUT -p tcp --dport ssh -j fail2ban-SSH iptables -F fail2ban-SSH iptables -X fail2ban-SSH returned 100 2010-07-13 10:55:41,829 fail2ban.jail  : INFO  Jail 'ssh-iptables' stopped 2010-07-13 10:57:45,656 fail2ban.server : I (HowTos)