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Password-Protect Directories With mod_auth_mysql On Apache2 (Debian Squeeze)
This guide explains how to password-protect web directories (with users from a MySQL database) with mod_auth_mysql on Apache2 on a Debian Squeeze server. It is an alternative to the plain-text password files provided by mod_auth and allows you to use normal SQL syntax to create/modify delete users. You can also configure mod_auth_mysql to authenticate against an existing MySQL user table.