Install Varnish from
https://www.varnish-cache.org/installation/redhat
Make Varnish start at boot
chkconfig --level 345 varnish on
Config Varnish
/etc/sysconfig/varnish
Config Backend
/etc/varnish/default.vcl
Start Varnish
service varnish start
Check it’s running
netstat -plunt