Fail2Ban is an important utility on the modern Internet for stopping “port probe” and other repeat intrusion\/login attempts on your Internet services. The following describes how to install and initially configure it to monitor & block repeated login failures on the SSH service.<\/p>\n
It isn’t in the standard CentOS 7 Repositories, but is easily installed and configured with the following commands and settings done as the root user:<\/p>\n
a) The Fail2Ban package is in the EPEL-Release repository which is activated with the command:<\/p>\n
b) After the above which makes the EPEL Release Repository available for use, Fail2Ban is installed with:<\/p>\n c) Fail2Ban is activated on the system with the command:<\/p>\n A quick SSH based default config for fail2ban is achieved by loading the following lines to the newly created file \/etc\/fail2ban\/jail.local<\/p>\n # Override \/etc\/fail2ban\/jail.d\/00-firewalld.conf: [sshd] The above configured Fail2Ban to block repeat offenders for 1 hour, to use the IPTables Firewalling capabilities on the SSH port of 22.<\/p>\n After loading the above to the jail.local file, restart the fail2ban service with:<\/p>\n You can check on fail2ban’s operations with the command:<\/p>\n FYI, Fail2Ban is an important utility on the modern Internet for stopping “port probe” and other repeat intrusion\/login attempts on your Internet services. The following describes how to install and initially configure it to monitor & block repeated login failures on … Continue reading yum install epel-release<\/code><\/p>\nyum install fail2ban<\/code>
\n(type ‘y’ to confirm the EPEL Key etc)<\/p>\nsystemctl enable fail2ban<\/code><\/p>\n[DEFAULT]
\n# Ban hosts for one hour:
\nbantime = 3600<\/p>\n
\nbanaction = iptables-multiport<\/p>\n
\nenabled = true<\/code><\/p>\nsystemctl restart fail2ban<\/code><\/p>\nfail2ban-client status<\/code><\/p>\n
\nRichard.<\/p>\n","protected":false},"excerpt":{"rendered":"