varnish/cpanel

http://www.cpanelkb.net/how-to-install-varnish-cache/
How to install varnish cache on cpanel
First, you need to change Apache listening port to another port 82 or anything else.

vi /etc/httpd/conf/httpd.conf

or you can change via WHM -> Tweak Settings -> set value of field Apache non-SSL IP/port to 82.

You can install varnish through YUM or manually download varnish RPM.

yum install varnish

or

for EL6

wget https://repo.varnish-cache.org/redhat/varnish-3.0/el6/noarch/varnish-release/varnish-release-3.0-1.el6.noarch.rpm

rpm ivh varnish-release-3.0-1.el6.noarch.rpm

Once installation completed, Edit configuration file and change listening port to 80

vi /etc/sysconfig/varnish

VARNISH_LISTEN_PORT=80

Edit proxy settings in varnish

vi /etc/varnish/default.vcl or check with /usr/local/varnish/etc/varnish/vhost.vcl

backend default {
.host = "184.82.165.4";
.port = "82";
}

sub vcl_recv {
if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
return(lookup);
}
}

# strip the cookie before the image is inserted into cache.

sub vcl_fetch {
if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") {
unset beresp.http.set-cookie;
}
}
Enable chkconfig  and restart varnish service

chkconfig varnish on
service varnish start

Thats all… You can monitor varnish cache through this monitoring tool.
#########################################################################################################

https://danielmiessler.com/blog/changing-your-server-headers-using-varnish/