Last modified: 2014-08-17 11:44:34 UTC
On an external MW installation (ver 1.17.0), the parm re max range has been changed as follows: $wgBlockCIDRLimit = array ( 'IPv4' => 8, 'IPv6' => 19, # 2^109 = ~6.5x10^32 addresses ); Applied one /8 hard block. Block log and block list are ok. However certain IP's from that range still succeed to register new accounts. Because of bug 41778 the fields "ipb_range_start" and "ipb_range_end" have been checked. They are of the type "tinyblob". So it might be that somewhere a routine cannot handle the diff between hi and lo of that range (i.e. 16777216) because a variable has been declared as a 16 bit integer or something like that. Obviously would never be discovered on WMF wikis because max block range is /16
Have you checked if this problem still happens with a supported version of MediaWiki (if so, which version)?
RonaldB: Could you answer comment 1, please?
@Andre Klapper, No. Is existing installation and I don't have control re that aspect myself. But doubt whether this is version specific. As Wikipedia etc. is restricted to blocking /16 ranges at the largest, I fear that the blocking functionality for larger ranges (e.g. /8) has not been tested for ages. The work-around is obviously breaking down large ranges into (quite a number) of smaller ones. Btw: reason for interest to block large ranges is spam from countries (e.g. CN) that would never be interested to edit any page on that particular wiki.
