[Mediawiki-l] problems with spam: howto block ip ranges?

[Markus Klaus Schäffauer]

hello,

is there a possibility to block ip ranges in MediaWiki?

at www.vdr-wiki.de we have increasing problems with robot spamer. it is 
a lot of work to block individual IPs, as the robot is changing 
permanently (but allways inbetween a certain range).

or can you recomend us other possibilities to stop that abuse?

thank you
markus