Deny from Semalt: How to Block Semalt Referrer Spam in HTML


Semalt is a notorious referrer spam bot that plagues websites by generating fake traffic. Referrer spam can distort website analytics, affect SEO performance, and consume server resources. Blocking Semalt is crucial to maintain the integrity of website data and ensure accurate analysis. In this article, we will discuss how to deny access from Semalt using HTML code and prevent referrer spam from affecting your website.

What is Semalt?

Semalt is an aggressive referrer spam bot that sends fake traffic to websites. It aims to promote its own services by appearing in website analytics as a referrer. Semalt spam often shows up in the referral section of analytics tools, making it seem like a legitimate source of traffic. However, Semalt does not actually visit your website; it only sends requests to your server, leaving no actual trace of interaction.

Why Block Semalt?

Blocking Semalt and other referrer spam bots is essential for several reasons:

1. Accurate website analytics: Referrer spam artificially inflates website traffic, distorting the actual data. By blocking Semalt, you can ensure that your website analytics provide accurate insights and help you make informed decisions.

2. Improved SEO performance: Referrer spam can negatively impact your website’s search engine optimization (SEO). Search engines may interpret the spam traffic as suspicious, potentially affecting your website’s ranking. Blocking Semalt helps maintain a clean and trustworthy website reputation.

3. Resource optimization: Semalt spam consumes server resources, including bandwidth and processing power. By denying access to Semalt, you can optimize your server’s performance and reduce unnecessary resource consumption.

In the next section, we will explore how to use HTML code to deny access from Semalt and effectively block this referrer spam bot from affecting your website.

Stay tuned for the second part of this article, where we will provide step-by-step instructions on implementing the HTML code to block Semalt.

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Deny from Semalt: How to Block Semalt Referrer Spam in HTML

Implementing HTML Code to Block Semalt

Blocking Semalt referrer spam can be achieved by adding specific HTML code to your website. Here are the steps to implement the code:

Step 1: Identify your website’s .htaccess file

The .htaccess file is a configuration file that allows you to customize the behavior of your webserver. It is commonly located in the root directory of your website. If you are unsure about its location, you can use an FTP client or access your website’s file manager to find it.

Step 2: Open the .htaccess file

Using a text editor, open the .htaccess file. Make sure to create a backup of the file before making any changes. This will allow you to restore it in case any issues arise.

Step 3: Add the code to block Semalt

To block Semalt, add the following lines of code to your .htaccess file:

# Block Semalt Referrer Spam
RewriteEngine on
RewriteCond %{HTTP_REFERER} semalt\.com [NC]
RewriteRule .* – [F]

The code above utilizes Apache’s `mod_rewrite` module to redirect any requests coming from Semalt’s domain ( to a 403 Forbidden error page.

Step 4: Save and upload the .htaccess file

Save the changes made to the .htaccess file and upload it back to your website’s root directory. Ensure that the file is named exactly “.htaccess” and that it is placed in the correct directory.

Step 5: Test the implementation

After uploading the modified .htaccess file, you can test its effectiveness by visiting your website and checking your analytics tool for any Semalt referrals. If the implementation was successful, you should no longer see Semalt spam in your analytics.


Blocking Semalt referrer spam is crucial to maintain accurate website analytics, improve SEO performance, and optimize server resources. By following the steps outlined in this article and implementing the provided HTML code, you can effectively block Semalt and prevent it from negatively impacting your website. Regularly monitoring your analytics and staying vigilant against new spam bots will help ensure the ongoing integrity of your website data.

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