IP block exempt
Users who are given the ipblock-exempt flag ('ipblock-exempt' user group) are not affected by autoblocks, blocks of IP addresses and rangeblocks. They are also exempt from proxy blocks and Tor blocks. This right is automatically assigned to administrators, however the flag must be added separately to enable editing from IP addresses affected by Tor blocks.
Historically, administrators would "softblock" IP's allowing named editors to continue to edit, while disallowing anonymous editing and user registrations. With this flag, this is no longer required.