spam-prevention | 易学教程

Reliably detecting PhantomJS-based spam bots

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问题 Is there any way to consistently detect PhantomJS/CasperJS? I've been dealing with a spat of malicious spambots built with it and have been able to mostly block them based on certain behaviours, but I'm curious if there's a rock-solid way to know if CasperJS is in use, as dealing with constant adaptations gets slightly annoying. I don't believe in using Captchas. They are a negative user experience and ReCaptcha has never worked to block spam on my MediaWiki installations. As our site has no

How to detect fake users ( crawlers ) and cURL

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问题 Some other website use cURL and fake http referer to copy my website content. Do we have any way to detect cURL or not real web browser ? 回答1: There is no magic solution to avoid automatic crawling. Everyting a human can do, a robot can do it too. There are only solutions to make the job harder, so hard that only strong skilled geeks may try to pass them. I was in trouble too some years ago and my first advice is, if you have time, be a crawler yourself (I assume a "crawler" is the guy who

What is the best way to programmatically detect porn images? [closed]

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Akismet does an amazing job at detecting spam comments. But comments are not the only form of spam these days. What if I wanted something like akismet to automatically detect porn images on a social networking site which allows users to upload their pics, avatars, etc? There are already a few image based search engines as well as face recognition stuff available so I am assuming it wouldn't be rocket science and it could be done. However, I have no clue regarding how that stuff works and how I should go about it if I want to develop it from scratch. How should I get started? Is there any open

Spam Prevention/Reduction - Contact Form?

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问题 I want to add a simple Contact form to my web site so that customers can contact me easily. <form> NAME <input type=\'text\' name=\'name\' /> EMAIL <input type=\'text\' name=\'email\' /> MESSAGE <textarea name=\'message\' /> <input type=\'submit\' /> </form> This form would simply email me the customers message. But, I also want to reduce (not, I\'m not saying eliminate but at least reduce), SPAM. I\'ve looked into using CAPTCHAs but, ultimately, I don\'t want to hinder the customer with

Hunting cheaters in a voting competition

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问题 Currently we are running a competition which proceeds very well. Unfortunately we have all those cheaters back in business who are running scripts which automatically vote for their entries. We already saw some cheaters by looking at the database entries by hand - 5 Star ratings with same browser exactly all 70 minutes for example. Now as the userbase grows up it gets harder and harder to identify them. What we do until now: We store the IP and the browser and block that combination to a one

How effective is the honeypot technique against spam?

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问题 By \"honeypot\", I mean more or less this practice: #Register form <style> .hideme{ display:none; visibility: hidden; } </style> <form action=\"register.php\"> Your email: <input type=\"text\" name=\"u-email\" /> Choose a password: <input type=\"text\" name=\"passwd\" /> <div class=\"hideme\"> Please, leave this field blank: <input type=\"text\" name=\"email\" /> #the comment is for text-browser users </div> <input type=\"submit\" value=\"Register\" autocomplete=off /> </form> //register.php

Better Honeypot Implementation (Form Anti-Spam)

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问题 How do we get rid of these spambots on our site? Every site falls victim to spambots at some point. How you handle it can effect your customers, and most solutions can discourage some people from filling out your forms. That\'s where the honeypot technique comes in. It allows you to ignore spambots without forcing your users to fill out a captcha or jump through other hoops to fill out your form. This post is purely to help others implement a honeypot trap on their website forms. Update:

When the bots attack! [closed]

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问题 What are some popular spam prevention methods besides CAPTCHA? 回答1: I have tried doing 'honeypots' where you put a field and then hide it with CSS (marking it as 'leave blank' for anyone with stylesheets disabled) but I have found that a lot of bots are able to get past it very quickly. There are also techniques like setting fields to a certain value and changing them with JS, calculating times between load time and submit time, checking the referer URL, and a million other things. They all

What is the best way to programmatically detect porn images? [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. Akismet does an amazing job at detecting spam comments. But comments are not the only form of spam these days. What if I wanted something