Dont bother with the IP-Adresses, install proper Anti-Spam-Extensions.
See http://www.mediawiki.org/wiki/Manual:Combating_spam for a MediaWiki-Helppage (and follow the links on that page to learn more), or have a look at http://www.wiki-aventurica.de/wiki/Wiki_Aventurica:Anti-Spam which is a short summary of measures that work for me.
I highly recommend using the QuestyCaptcha-part of Confirm-Edit to prevent account creation, and installing SpamBlacklist to block those pesky spamlinks.
For this http://arktur.de/Wiki/index.php?title=Kategorie:Whiteboard&curid=2323&am... kind of spam you might need to install SpamRegex or AbuseFilter, though.
Greetings Stip
Am 27.05.2012 12:24, schrieb Helmut Hullen:
Hallo,
is it possible that a bad guy fakes his IP address when he creates a page?
My wiki (arktur.de/Wiki) suffers from Wiki spam, and sometimes I see IP addresses from spammers which don't occur in the apache access_log.
Viele Gruesse! Helmut
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