How to ban http:\\ in comments

[TerraNaut]

I'm sorry if this question have been asked before, but how can you ban comments who referer to a web page (ie. http://www.something.com)

My gallery have been spammed a bit with comments like this. One solution is to turn off the possibility to comment without being logged in, but I would like non-members to comment the photos.

I have tried to edit the ban-list by adding the words [http] and [www] but it won't work? Any ideas?

/TerraNaut

[Nibbler]

Try the akismet mod, maybe that will help.