如果你查看jail.conf,你会看到一行说明:
# Default banning action (e.g. iptables,iptables-new,# iptables-multiport,shorewall,etc) It is used to define # action_* variables. Can be overriden globally or per # section within jail.local file banaction = iptables-multiport
所有操作都在/etc/action.d/中