Configuring Apache2 as a proxy for Mattermost Server (Unofficial)


This unofficial guide is maintained by the Mattermost community and this deployment configuration is not yet officially supported by Mattermost, Inc. Community testing, feedback and improvements are welcome and greatly appreciated. You can edit this page on GitHub.

In order to use Apache as a reverse proxy for the mattermost server, you need to install and enable the following apache modules: mod_rewrite , mod_proxy, mod_proxy_http and mod_proxy_wstunnel. Follow the instructions from your linux distribution to do so.

The Apache2 proxy configuration is done through the /etc/apache2/sites-available directory. If you’re setting up Mattermost on a subdomain you’ll want to create a new configuration along the lines of

Copy the default configuration file found in the same directory.

To configure Apache2 as a proxy

  1. SSH into your server.

  2. Make sure the apache modules mod_rewrite , mod_proxy, mod_proxy_http and mod_proxy_wstunnel are installed and enabled. If not, follow the instructions from your linux distribution to do so.

  3. Create/open the above mentioned file (000-default or a new subdomain configuration).

  4. Edit your configuration using the guide below:

    1. If you’re not setting up a subdomain your ServerName will simply be set to
    2. ServerAlias can been added too if you want to capture
    3. Remember to change the values to match your server’s name, etc.
    4. If you have enabled TLS in the Mattermost settings, you must use the protocol wss:// instead of ws:// in the RewriteRule.
    5. Save once finished.
<VirtualHost *:80>
  # If you're not using a subdomain you may need to set a ServerAlias to:
  # ServerAlias
  ProxyPreserveHost On

  # Set web sockets
  RewriteEngine On
  RewriteCond %{REQUEST_URI} /api/v[0-9]+/(users/)?websocket [NC,OR]
  RewriteCond %{HTTP:UPGRADE} ^WebSocket$ [NC,OR]
  RewriteCond %{HTTP:CONNECTION} ^Upgrade$ [NC]
  RewriteRule .* ws://{REQUEST_URI} [P,QSA,L]

  <Location />
        Require all granted

  1. Because you’ll likely have not set up the subdomain before now on Apache2, run a2ensite to enable the site (do not run a2ensite

  2. Restart Apache2

    • On Ubuntu 14.04 and RHEL 6: sudo service apache2 restart
    • On Ubuntu 16.04 and RHEL 7: sudo systemctl restart apache2

You should be all set! Ensure that your Mattermost config file is pointing to the correct URL and then ensure that once deployed your socket connection is not dropping.