LPIC-2 Certified Linux Engineer (202-450) (#47)

With fail2ban, what is a ‘jail’?

A netfilter rules chain blocking offending IP addresses for a particular service
A group of services on the server which should be monitored for similar attack patterns in the log files
A filter definition and a set of one or more actions to take when the filter is matched
The chroot environment in which fail2ban runs