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Vincent Massol 1.1 1 {{box cssClass="floatinginfobox" title="**Contents**"}}
2 {{toc/}}
3 {{/box}}
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5 The XWiki project offers several solutions to help fight spam. These are especially useful when XWiki is used as a public site.
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Vincent Massol 2.1 7 = Correct Permissions =
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9 The first thing to do is to make sure you have not left comments open to anyone since this for sure will get you a lot of spam.
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11 What you should do is either allow the Comment right only to registered users or at least ask for Captcha for anonymous users (see below).
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13 Here are some scripts to help you remove comment spam:
Vincent Massol 3.1 14
Vincent Massol 2.2 15 * [[snippets:Extension.Remove All Anonymous Comments]]
16 * [[snippets:Extension.Remove All Comments]]
Vincent Massol 2.1 17
Vincent Massol 1.1 18 = CAPTCHA =
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20 You can enable [[Captchas>>https://en.wikipedia.org/wiki/CAPTCHA]] both on the [[registration screen>>extensions:Extension.Administration Application||anchor="HActivatingcaptchas"]] and for [[comments>>extensions:Extension.Administration Application||anchor="HRights"]].
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22 You can also use the [[XWiki Catpcha module>>extensions:Extension.Captcha Module]] if you need a tighter integration in your own wiki pages / wiki application.
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24 = Notifications =
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26 You can choose to be [[informed by mail>>extensions:Extension.Watchlist Application]] (even in real time) about changes done to your wiki, and thus be able to quickly revert spam.
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28 You can also install the [[IRC Bot Application>>extensions:Extension.IRC Bot Application]] to get instant IRC notifications when a page in the wiki is modified.
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30 = Delayed Indexing =
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32 You can implement [[Delayed Indexing>>http://c2.com/cgi/wiki?DelayedIndexing]] to discourage spammers. It tells search engines to not index pages that were recently updated. On an active wiki, spam will be removed very quickly by community members. Once a page has not been edited for a while, you can assume the community approves of the pages content and thus is spam-free.
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34 This can be achieved by editing the "HTTP META INFO" section of the [["Page Element" Administration section>>extensions:Extension.Administration Application||anchor="HPageElements"]]. For example you could decide to wait 5 hours after a page has been created before allowing it to be indexed by using:
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36 {{code}}
37 #if ($datetool.getDate().time - $doc.getCreationDate().time < 5*24*60*60*1000)
38 <meta name=“robots” content=“noindex,nofollow” />
39 #end
40 {{/code}}
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42 = AntiSpam Application =
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Vincent Massol 1.3 44 Last but not least, you could install the [[AntiSpam Application>>extensions:Extension.AntiSpam Tool Application]] which provides 2 main features:
Vincent Massol 3.1 45
Vincent Massol 1.1 46 * Ability to prevent spam from being entered (by filtering on keywords)
47 * UI to easily remove spam content and all content entered by some given user
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Vincent Massol 2.1 49 = Others =
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Vincent Massol 2.2 51 * [[snippets:Extension.Delete Spam Users]]

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