ohtan

<h3>■バージョン2.1.0以前は下記にあります</h3>
<p>http://cmf.ohtanz.com/spam-bye2.html</p>
<h3>■特徴</h3>
<p>日本語に特化して他言語圏spamを高確率で排除します</p>
<ul>
<li>1.ひらがなが含まれていない</li>
<li>2.日本語(2バイト以上の文字)が含まれていない</li>
<li>3.1行の文字数がN文字を超えている</li>
<li>4.連続した改行の合計がN個を超えている</li>
<li>5.URLが含まれている</li>
<li>6.NGワードが含まれている</li>
<li>7.URLがURIBLデータベースに登録されている</li>
<li>
<p>8.投稿者のIPがDNSBLデータベースに登録されている</p>
</li>
<li>
<p>チェック項目を順位付けられ早期に判別した場合残りの検査をしない為、処理が早く終わります</p>
</li>
<li>1、2は日本語投稿で必ず出現する文字</li>
<li>3はspamはあまり改行せずに投稿することがあるため</li>
<li>4は他者の投稿を読ませない等の妨害で改行を多用するため</li>
<li>5はURLの誘導</li>
<li>6は禁止語句</li>
<li>7、8は公平外部登録ブラックリスト照会</li>
<li>6、7、8は処理に時間が掛かる為、検査の順位は下位を推奨</li>
<li>6、7、8は検査項目が多いとタイムアウトする可能性があるため簡易検査程度に留めてください</li>
</ul>
<h3>Arbitrary section</h3>
<h4>■See also(DNSBL/URIBL)</h4>
<ul>
<li>Barracuda Reputation Block List(b.barracudacentral.org)</li>
</ul>
<blockquote>
<p>http://www.barracudacentral.org/rbl</p>
</blockquote>
<ul>
<li>RBL.JP(url.rbl.jp/dyndns.rbl.jp/notop.rbl.jp)</li>
</ul>
<blockquote>
<p>http://www.rbl.jp/allrbl.html</p>
</blockquote>
<ul>
<li>SURBL(multi.surbl.org)</li>
</ul>
<blockquote>
<p>http://www.surbl.org/</p>
</blockquote>
<ul>
<li>URIBL(multi.uribl.com)</li>
</ul>
<blockquote>
<p>http://www.uribl.com/</p>
</blockquote>


spam-byebye

コメントスパム対策用プラグイン(SPAM-BYEBYE)

Samir Shah

<p>This plugin has two modes – basic and Akismet-enhanced.</p>
<p><strong>Basic mode</strong>: the plugin will serve a CAPTCHA to all commenters that aren’t logged in and don’t have a previously approved comment. Repeat commenters will never see a CAPTCHA.</p>
<p><strong>Akismet-enhanced mode (recommended)</strong>: the plugin will serve a CAPTCHA only if Akismet identifies a comment as spam (much less frequently than the basic mode). Just install an activate <a href="https://wordpress.org/extend/plugins/akismet/" rel="ugc">Akismet</a> to enable this mode.</p>
<p>Note that a CAPTCHA will only appear <strong>after</strong> a comment is submitted. When a commenter is served a CAPTCHA:</p>
<ul>
<li>If they fail, then the comment will be automatically discarded or trashed (and won’t clutter up your spam queue).</li>
<li>If they pass, it will be allowed into the spam queue (or approved, if you so choose). This means that any false positives from Akismet will be easily identified without you having to trawl through all the spam comments manually.</li>
</ul>
<p>Most genuine commenters will be able to comment on your site hassle-free, without ever seeing a CAPTCHA.</p>
<p>The default CAPTCHA is a simple text-based test. There is also the option to use <a href="http://www.google.com/recaptcha" rel="nofollow ugc">reCAPTCHA</a> if you want something more robust (free API key required). You can also style the CAPTCHA page to fit with your own WordPress theme.</p>
<p>If you come across any bugs or have suggestions, please use the plugin support forum or <a href="http://rayofsolaris.net/contact/" rel="nofollow ugc">email me</a>. I can’t fix it if I don’t know it’s broken! Please check the <a href="https://wordpress.org/extend/plugins/wp-conditional-captcha/faq/" rel="ugc">FAQs</a> for common issues.</p>
<p>Thanks to the following people for contributing translations of this plugin: Belorussian – <a href="http://pc.de" rel="nofollow ugc">Marcis G</a>, Brazilian Portuguese – Stefano, Czech – <a href="http://trumplin.com/" rel="nofollow ugc">Ted</a>, Danish – Jesper, Dutch – <a href="http://wpwebshop.com/books/" rel="nofollow ugc">Rene</a>, Estonian – <a href="http://www.itransition.com" rel="nofollow ugc">Itransition</a>, Finnish – Jani, French – <a href="http://android-software.fr" rel="nofollow ugc">Laurent</a>, German – <a href="http://jochenpreusche.com" rel="nofollow ugc">Jochen</a>, Hindi – <a href="http://outshinesolutions.com" rel="nofollow ugc">Outshine Solutions</a>, Hungarian – <a href="http://www.televizio.sk" rel="nofollow ugc">Gyula</a>, Italian – <a href="http://gidibao.net" rel="nofollow ugc">Gianni</a>, Lithuanian – Mantas, Polish – <a href="http://www.spin.siedlce.pl" rel="nofollow ugc">Pawel</a>, Romanian – <a href="http://simplu.mixnet.ro" rel="nofollow ugc">Lotus</a>, Russian – <a href="http://www.everycloudtech.com/" rel="nofollow ugc">Ivanka</a>, Spanish – <a href="http://www.reinventia.net" rel="nofollow ugc">Reinventia</a>, Swedish – <a href="http://www.umu.se" rel="nofollow ugc">Hugo</a>, Turkish – Tony, Ukranian – <a href="http://www.everycloudtech.com/" rel="nofollow ugc">Ivanka</a>. Some of these translations are a bit out of date – updates welcome!</p>


Conditional CAPTCHA

Asks commenters to complete a simple CAPTCHA if they don't have a previously approved comment, or if Akismet thinks their comment is spam.

spam-byebye vs Conditional CAPTCHA