CHAPTER 4 ADDING CONTRIBUTED MODULES 139 URL (Make a web site)
CHAPTER 4 ADDING CONTRIBUTED MODULES 139 URL Limits The Limits group on the Spam module s settings page deals with the number of URLs that can appear in either comments or normal content. For each, you can set the highest number of allowed URLs and the number of repeated URLs. Be careful when setting these that you don t preclude normal legitimate use of your web site. For example, if your site is supposed to have reviews of a certain type of web site, it is conceivable that someone would want to include several hyperlinks to reference the same page of the site being reviewed. On the other hand, setting these limits to something reasonable (between 3 to 5 in most cases) will catch and block the attempts of some spammers. Actions for Identified Spam What should happen when the spam filter identifies something as spam? That question is answered by the settings in the Actions group on the Spam module s settings page. You can have the content or comment automatically unpublished by checking the Automatically Unpublish Spam field. This might be the best option if spam or potentially embarrassing content could hurt your business or reputation if allowed to persist on the site for any amount of time. Use this option if you are too busy to constantly police your site (better to be safe than sorry). On the other hand, it is possible (though rare) for the Spam module to identify false positives, and users whose content gets unpublished may get very irritated with your site. The Notify Admin When Spam Detected field causes the administrator of the site to be notified whenever spam is identified. This should be checked as long as you leave possible spam published (Automatically Unpublish Spam is unchecked), or if you are worried about the chance of false positives. That way, you can closely monitor the Spam module s activities and see that it is doing its job correctly. Advanced Spam Module Configuration For everyone who wants to get the Spam module installed and running, the preceding configuration is all that needs to be done. If you re interested in playing around under the hood of the module and tweaking the Bayesian filter parameters, check the Advanced Configuration check box on the admin/settings/spam page and click Submit to see advanced options. The following are two advanced options that you might find interesting (and that don t introduce any risks): Display spam rating: This setting, under the Tools heading, will let you see the spam rat ing for any content or comments. This is a rating from 1 to 99, and the higher the rating, the more likely it is that it is spam. Collect statistics: If you instruct the module to collect statistics, you will have access to interesting information, such as how many spam comments or content submissions have been posted and when the last occurrence was. Managing URL Filters Whenever content is identified as spam, the Bayesian filter takes the opportunity to extract all of the URLs contained within and pay special attention to them. The logic is that the spammers golden eggs are the URLs, and therefore their most telling fingerprint.
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