Breaking: #91974 - Configuration Option IPmaskMountGroups removed

See Issue #91974

Description

The global configuration option $GLOBALS['TYPO3_CONF_VARS']['FE'][IPmaskMountGroups] has been removed. It allowed to automatically assign groups to users visiting the TYPO3 Frontend from specific IP addresses / networks.

This is especially handy to show content only in Intranet/Extranet sites where internal members see restricted content automatically.

However, showing content based on certain contexts, are usually solved with a much more flexible way through third-party extensions such as EXT:contexts. Third-party extensions allow even for automatic login based on IP-addresses, which should be used instead.

Impact

The mentioned option is automatically removed from LocalConfiguration.php on upgrade, and never evaluated anymore.

Affected Installations

Installations having the global configuration setting set in typo3conf/LocalConfiguration.php or typo3conf/AdditionalConfiguration.php, mostly related to intranet / extranet websites.

Migration

If this functionality explicitly is required, it can be overcome with a third-party extension, or a custom extension registering a AuthenticationService (“getGroupsFE”) to assign the groups on a more specific approach.