# Upgrading MariaDB MaxScale from 6 to 22.08

This document describes possible issues when upgrading MariaDB MaxScale from\
version 6 to 22.08.

For more information about MaxScale 22.08, refer to the [ChangeLog](https://github.com/mariadb-corporation/mariadb-docs/blob/main/maxscale/maxscale-archive/archive/mariadb-maxscale-23-02/mariadb-maxscale-23-02-upgrading/broken-reference/README.md).

Before starting the upgrade, any existing configuration files should be backed\
up.

## Removed Features

* The support for legacy encryption keys generated with `maxkeys` from pre-2.5\
  versions has been removed. This feature was deprecated in MaxScale 2.5 when\
  the new key storage format was introduced. To migrate to the new key storage\
  format, create a new key file with `maxkeys` and re-encrypt the passwords with`maxpasswd`.
* The deprecated Database Firewall filter has been removed.

<sub>*This page is licensed: CC BY-SA / Gnu FDL*</sub>

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