captcha: http://forums.b2evolution.net/viewtopic.php?t=2976

moderate comments: http://forums.b2evolution.net/viewtopic.php?t=5343

There may be others, but those are the two that come to mind.

As is always the case, keep your antispam table up to date (often requiring several "request update"s in a row until you get only one response that is "not needed - already handled"), and ban/delete/report spammers as soon as you see them.

Gosh now *again* I remember I never published my bobobox hack. It's a low-level word verification thing, but it stopped the problem for me.

Oh heck now I remember the really really easy one: change the name of your htsrv folder, as identified in the first post in http://forums.b2evolution.net/viewtopic.php?t=3764 It's not a word verification method, but the goal is to stop comment spam right?

Those topics are also worth reading:

• [url=http://forums.b2evolution.net/viewtopic.php?t=5322]How to control referer spam hits from search engines[/url]

• [url=http://forums.b2evolution.net/viewtopic.php?t=4910&highlight=weight]Public Stats: Reduce Referrer Spam Weight[/url]

• [url=http://forums.b2evolution.net/viewtopic.php?t=4876]Spam: an IP based approach[/url][/list:u]

It really helps not being indexed on search engines as a blog publishing its statistics, so update your skins to remove the 'disp=stats' and others to reduce your blog's inclusion into spammers databases... Moreover, since I updated my .htaccess blog to define the following filters (appearing at the end of .htaccess):

#
# Skip whitelist (empty referrer, search engine or other trusted sites)
RewriteCond %{HTTP_REFERER} ^(http:\/\/(www[0-9]?\.google\.[^\/\?]{2,6}|search\.msn\.[^\/\?]{2,6}|[^\/]{2,20}\.yahoo\.com|www\.allisonline\.com|[^\/\?]{2,6}\.altavista\.com|a9\.com|[^\/]{2,20}\.msn\.(be|ca)|www\.alltheweb\.com|([^\/\?]{3,20}\.)?b2evolution\.net|(www\.|blog\.)?lesperlesduchat\.com|[^\/\?]{5,25}\.fr|((blog|www)\.voissa|daphneethippolyte\.blogspot|(www\.(adultblogindex|journalduporn|les-bas-noirs|mubility))|cain69annu\.mylinea|portal\.eatonweb|sexe\.humanfee)\.com|([^\/\?]{3,20}\.((canalblog|hautetfort|over-blog|typepad)\.com|entierement\.nu|e-oekaki\.info))|shboy\.org)([\/\?].*))?$ [NC]
RewriteRule ^.*$ - [L]

#
# Block referer spam
RewriteCond %{HTTP_REFERER} ^((http:\/\/)?[^\/\?]*(\.(am|at|br|by|bz|cc|de|in(fo)?|jp|kz|la|ly|ms|name|nl|nu|ru|sk|to|us|ws)($|[\/\?])|\bmaxi\.|\bmaximum\.|pharm|\bpill|\bmed\b|\bmeds\b|\bcialis|cialis\b|viagra|phent|vicodin|celexa|poker|casino|buy|debt|credit|incest|bankrupt|loan|cheap|cash|money|finance)).*$ [NC,OR]
RewriteCond %{HTTP_REFERER} (-happydale\.org|\.7zulu\.org|\.afraid\.org|\.aixx\.com|\.alabamaworks\.org|\.assparade\.com|\.assplundering\.com|\.bitlocker\.net|\.blrforward\.org|\.chiki-piki\.com|\.ddomen\.com|\.denrer\.com|\.dnip\.net|\.fiberia\.com|\.fincompa\.com|\.funktio\.org|\.gacicuba\.org|\.good-phentermine\.com|\.hopto\.org|\.hotelgaydays\.com|\.ignorelist\.com|\.ipfixe\.com|\.ivtcscs\.org|\.jixx\.de|\.jobsteve\.com|\.jxnarc\.org|\.latexgalleriesporn\.com|\.lenarcic\.org|\.mentorsverige\.org|\.mpegbestiality\.com|\.mygamesite\.net|\.netfirms\.com|\.prout\.be|\.rapedhousewife\.com|\.search-corp\.com|\.serveftp\.net|\.sickeness\.com|\.siteburg\.com|\.static\.net|\.stock-a\.com|\.sytes\.net|\.t28\.net|\.test\.com|\.tiny-search-engine\.com|\.tugjobs\.com|\.twinstatesnetwork\.org|\.ukrtel\.net|\.worfa\.org|\.x-honi\.com|\.zu5\.net|california-job-nurse-travel\.blogspot\.com|care-health-job-usa\.blogspot\.com|insurance|search-corp\.com|sickeness\.com|texas-|tiny-search-engine\.com) [NC]
RewriteCond %{REQUEST_URI} !(antispam\.php) [NC]
RewriteRule .* antispam.php?from=%{HTTP_REFERER}&to=%{REQUEST_URI} [R=302,L]

I have very few referrer spamming and only one comment spam for weeks. Adding common, but sexual or pharmaceutics words to your local blacklist would also help preventing from having sexually oriented material in your comments. Obviously, if your blog have to talk about medecine and sexuality, that won't help a lot! I'm afraid there is no bayesian antispam filter filter available for [url=http://b2evolution.net]b2evolution[/url] yet... Maybe into the [url=http://forums.b2evolution.net/viewtopic.php?t=5367]Ultimate Antispam Plug-in[/url]...