This system allows or denies network access. One can reject or allow specific IP addresses or subnets to access your system. One can also specify an entire domain. ALL This generally denies any access. See the pam man page.
Files reflect the inet service name.
Rules and modules are stacked to achieve the level of security desired. Can track and force password changes. Removes all files of older version. RPM flag to force install even if dependancy requirements are not met. Overwrite of other packages allowed.