help centre
For more info visit

How can we help?

Search our knowledge base for answers to
common questions and latest updates.

My activities New request


Apache and Varnish

Nathan Salt -


I want to use Varnish


  • On-Premise Server + WebMail Installations: Version 6.0 > Current Version
  • Webmail Only Installations: Version 6.0 > Current Version


Speed up HTTP transactions


Varnish is a state-of-the-art, high-performance HTTP accelerator, used by sites such as Facebook and Twitter.

You can enable Varnish for your site by following these steps:

1.) Download Varnish from:

2.) Untar, install:

% tar xvfz varnish-2.1.2.tar.gz
% cd varnish-2.1.2
% ./configure --prefix=/usr/local/varnish/
% make && make install

3.) Open up your /usr/local/varnish/etc/varnish/default.vcl, and set this line block:

backend default {
.host = "";
.port = "8080";

This will set the hostname and the port where your webserver will stay. This will be the connection details for your webserver. In this case, we will use a local webserver running on port 8080.

4.) Open up your Apache configuration file. Find:

Listen 80

5.) Change to your preferred alternate port:

Listen 8080

6.) Restart Apache:

% apachectl restart

7.) Start Varnish:

% /usr/local/varnish/sbin/varnishd -a :80 -b localhost:8080 -T localhost:8090 -s file,/usr/local/varnish/varnish.cache,4G

To explain the settings briefly:

-a :80 defines the port for Varnish to run on.
-b localhost:8080 defines the port and host of the webserver you want to cache
-T localhost:8090 defines the port and host for the Varnish terminal to run in
-s file,/usr/local/varnish/varnish.cache,4G defines the cache file, and the size limit.

Congratulations! You now have Varnish running.

For more information about Varnish Cache, see:

Have more questions? Submit a request


Contact our support team

+61 (7) 5357 6605