Talk:Brute Force Dictionary Attack on Dovecot
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installation runlevels of fail2ban and iptables testing
Installation runlevels
chkconfig fail2ban on - makes fail2ban start with the sytem runlevels in rc.d/rc3.d at startup chkconfig fail2ban off - disables fail2ban from starting automatically at system startup chkconfig --level 23 fail2ban on - you can specify the runlevel to set the order it loads in relation to the other services chkconfig fail2ban on && service fail2ban start - set it to start at boot and get it started immediately
Restart IPtables, Fail2ban and check the status of the Fail2ban install:
service iptables restart && service iptables status
Remove a ban from the Fail2ban SSH chain (change IP address):
su -c "iptables -D fail2ban-SSH -s 192.168.1.0 -j DROP"
WARNING 'ignoreregex' not defined in 'Definition'. Using default one:
On service start
service fail2ban start
There is the following error:
WARNING 'ignoreregex' not defined in 'Definition'. Using default one:
This can be corrected by adding the following line:
ignoreregex =
To all active filter files in filter.d, such as
vi filter.d/postfix-sasl.conf
ISSUE: RESOLVED
WARNING 'actioncheck' not defined in 'Definition'. Using default one:
On service start
service fail2ban start
There is the following error:
WARNING 'actioncheck' not defined in 'Definition'. Using default one:
This can be corrected by adding the following line:
actioncheck =
To all active action files in action.d, such as
vi action.d/iptables-multiport-tcp.conf
source: trial and error
ISSUE: RESOLVED
