Manual:$wgSysopRangeBans

Access: $wgSysopRangeBans
Allow sysops to ban IP ranges
Introduced in version:1.2.0
Deprecated in version:1.17.0
Removed in version:1.18.0 (r86125)
Allowed values:(boolean)
Default value:true (1.4.1-1.17)
false (1.2-1.4.0)

Details

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Allow sysops to ban IP ranges.

To disable rangeblocking in later versions of MediaWiki, add the following to your LocalSettings.php :

$wgBlockCIDRLimit = array( 'IPv4' => 32, 'IPv6' => 128 );

See also

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Basic user rights and block settings: