This page contains free programs and utilities made available to the public. Please read the license terms and disclaimer accompanying each before using.

Program Target
Language Description
Unix Perl This program tracks repeated bad ssh login attempts and adds offending IP addresses to /etc/hosts.allow to block further access after a specified number of attempts.
Unix PHP This small program compares local-host-names to the Sendmail virtmap table and alerts the user of any domains that do not have a "catchall" alias defined. Unhandled usernames are otherwise matched to system users. A catchall typically rejects mail for unknown users or handles it appropriately. Useful before installing CPX.

Syntax (from shell): ./check_catchalls (no options)

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