T35734 resulted in a change from /64 to /48. However, considering that administrators are able to block IPv6 ranges of /32, but CheckUsers are only able to see /48, the limits should be normalized. This has been discussed a number of times amongst CheckUsers and Stewards, and there was has been wide support for this change.
I'm not a PHP coder, but I think that this simply requires a change of line 64 of CheckUser.php:
'IPv6'=>48,
to:
'IPv6'=>32,
| Subject | Repo | Branch | Lines +/- | |
|---|---|---|---|---|
| Allow CheckUser for IPv6 ranges up to /32 | mediawiki/extensions/CheckUser | master | +4 -4 |
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Declined | None | T58252 IPv6 range blocks should be limited to /48s, not /19s | |||
| Resolved | saper | T95857 Allow IPv6 checks up to /32 |
The extension's code you've found just lets sites configure it easily... Given your references to stewards I'm going to assume this is really a Wikimedia site configuration change request.
Perhaps that is the case - I know how to use the tool, but I don't have a clue as to how to configure it. Thanks for the correction.
I think we can change the global default in the CheckUser extension. This can be useful also for other
users of this extension.
Change 203679 had a related patch set uploaded (by saper):
Allow CheckUser for IPv6 ranges up to /32
administrators are able to block IPv6 ranges of /32
Last time (earlier this week) I checked, it was /19.. so why not allow /19 instead?