Change apache port to use Varnish on 80

Hi. I’ve installed latest Virtualmin on centos 6.

In server template I change port number for virtual hosts to 10080 and next add new virtul server, restart apache but still listen on port 80.
What I have to change else?

I edited httpd.conf

Listen *:10080

restart apache but still don’t work
Of course I have everythig correctly like installed mod_rpaf and configured and running Varnish. This was tested on other hosting panels.

Strange, it started work when edit backend ip in Varnish from to myserverip

Always it works on localhost ip.

Is it save with this configuration?