Am 20.08.2016 um 14:46 schrieb Günther J. Niederwimmer: > Hello List, > > with CentOS 7.2 it is not longer possible to run fail2ban on a Server ? > > I install a new CentOS 7.2 and the EPEL directory > yum install fail2ban No such issue on a clean test install. [root at centos7 fail2ban]# rpm -qa fail2ban\* fail2ban-sendmail-0.9.3-1.el7.noarch fail2ban-firewalld-0.9.3-1.el7.noarch fail2ban-0.9.3-1.el7.noarch fail2ban-server-0.9.3-1.el7.noarch Make sure you have fail2ban-firewalld installed as this provides the configuration to use firewallcmd-ipset as default banaction. Plenty of reasons for the "ERROR: NOT_ENABLED" logging, see man 5 firewalld.dbus. Alexander