Limiting the number of concurrent IPs and controlling download traffic using Apache.

1 year ago
Olivia Parker
2 minutes

One way to restrict the concurrency and download traffic of IP addresses is by using Apache modules. Here is one way to implement it:

  1. Install the mod_ratelimit module, which can be used to limit the concurrent connection number and download speed. Run the following command in the terminal to install the mod_ratelimit module:
sudo apt-get install libapache2-mod-ratelimit
  1. To enable the mod_ratelimit module, run the following command:
sudo a2enmod ratelimit
  1. Set limits on concurrent connections. Add the following code to your Apache configuration file (usually located in /etc/apache2/apache2.conf or /etc/httpd/httpd.conf):
<IfModule mod_ratelimit.c>
    # 限制指定IP的并发连接数为10
    <Location "/">
        SetOutputFilter RATE_LIMIT
        SetEnv rate-limit 1
        SetEnv rate-limit-max 10
    </Location>
</IfModule>

In the example above, we set the limit of concurrent connections to 10, which you can adjust according to your own needs.

  1. Set download speed limit. Add the following code to your Apache configuration file.
<IfModule mod_ratelimit.c>
    # 限制指定IP的下载速度为100kb/s
    <Location "/">
        SetOutputFilter RATE_LIMIT
        SetEnv rate-limit 2
        SetEnv rate-limit-max 100000
    </Location>
</IfModule>

In the example above, we set the download speed limit to 100kb/s, which you can adjust according to your needs.

  1. Restart the Apache server to apply the configuration:
sudo service apache2 restart

By following the above steps, you can use Apache’s mod_ratelimit module to limit the concurrent connection and download speeds for IPs. Please note that these limits will apply to all websites using the Apache server. If you only want to restrict specific virtual hosts, you can place the above code in the configuration file of the virtual host.

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