apache and node on the same server reserve ips?

I'm trying to install nodejs and apache on the same server following this:开发者_如何学Go

https://gist.github.com/754303

Step 2 says:

From the WHM cPanel, find the menu item Service Configuration, select Apache Configuration and then click on Reserved IPs Editor.

I don't have cPanel. What's the equivalent manual configuration?

Thanks!

Is it enough to edit your httpd.conf and edit the following line:

Listen a.b.c.d:80