Installing LSWS with Plesk

This wiki covers how to install LiteSpeed Web Server (LSWS) and LiteSpeed's Plesk Extension on a Plesk server and assumes that you have a working Apache-Plesk setup. While there are multiple ways to go about the installation, this wiki will only cover installing the Plesk Extension first and then installing LSWS from the extension.

Stopping Nginx Reverse Proxy Before LiteSpeed Installation

The latest version of Plesk may configure Nginx as a reverse proxy server that sits in between the Internet and Apache. Before installing LSWS, please turn off Nginx reverse proxy so that Apache is the only web server handling live traffic. Not stopping the Nginx reverse proxy will cause system errors and block the LiteSpeed process from being started.

Stopping Nginx reverse proxy:

From the Plesk Admin Console, navigate to…

Server Management → Tools and Settings → Server Management → Services Management → Reverse Proxy Server (nginx)

…and click the stop button.

Verify that no nginx process is still running with the following command:

ps -ef | grep nginx | grep master

If you see the following output:

root    16379    1  0 09:45 ?     00:00:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf

the Nginx reverse proxy has not yet been stopped and must still be stopped before attempting LiteSpeed installation.


  1. OSs: Linux, Solaris, FreeBSD, or MacOSX
  2. A working Apache setup
  3. Plesk 11 or up

Install the Plesk Extension

Download the extension


Or simply visit our control panel plugin download page and download it to your PC.

Note: Plesk 12 users can also find the Plesk Extension in the Plesk Extension catalog.

Add the extension from Plesk

Server Management > Extensions > Add Extension >

Plesk 11: Run the commands requested

Plesk 11 requires root level commands be run from the command line. To finish the installation, run the commands requested as root:

sh /usr/local/psa/admin/plib/modules/litespeed/scripts/install_scripts
rm /usr/local/psa/admin/plib/modules/litespeed/scripts/install_scripts

Note: Plesk 11 users will also see a warning that /sbin/ is not used when installing. This is normal and appears because the extension is compatible with both Plesk 11 and 12.

Install LSWS from the Plesk Extension

You can now access the LiteSpeed Plesk Extension under Server Management > Extensions > Module LiteSpeed.

Install LSWS

Click “Install LiteSpeed Web Server”.

Check “I agree” and input your license's serial number or request a trial license.

You must also set a password for LSWS's WebAdmin console. Other settings are optional, though it is recommended you install the first time with a port offset.

Other installation settings

  • Installation directory: Defines where LSWS will be installed.
  • Port offset: Allows running LSWS in parallel with Apache for testing purposes. The number in the port offset will be added to Apache port numbers to determine what port LSWS runs on. (For example, if the port offset is 1000, LSWS will serve sites on ports 1080 and 1443.)
  • Enable PHP suEXEC: Enables or disables suEXEC. This setting must be enabled if you currently use suEXEC.
  • Administrator email(s): Administrator emails.

When you're ready, click the “Install” button at the bottom.

Now, start LSWS by clicking “Restart LiteSpeed”.

Get PHP for LSWS

LSWS requires PHP built with LSAPI. There are a number of ways to get PHP with LSAPI.

  1. Many Plesk users may find it easiest to get PHP for LSWS through the Litespeed Repository or Remi Repository. Follow our Installing LSPHP via RPM guide for these steps.
  2. You can also build PHP through the WebAdmin console or through the command line. Building PHP yourself is covered in our Compile PHP for LSWS guide.

Once you have completed PHP installation, go to the next step: testing your sites.

Test your sites with a port offset

The beauty of the port offset is that you can run LSWS and Apache in parallel. This means you can try out your sites with LSWS to make sure they work before atually turning off Apache. In our setup, I have set the port offset to 1000. If I want to check any sites, I can do so on ports 1080 and 1443.

Once you're confident that your sites are running correctly with LSWS, it's time to switch to LSWS as your main server.

Switch to LSWS

Click “Switch to LiteSpeed”. This will stop Apache and switch LSWS to your main server ports — 80 and 443.

And now you're running LiteSpeed!

litespeed_wiki/plesk/installation.txt · Last modified: 2015/08/04 19:43 by Michael Alegre