BindAddress

If you are using an Apache version prior to 2.0, make sure the BindAddress directive in this file is commented out, like this:

 #BindAddress * 

This tells the Apache daemon(s) to listen for connection requests on all RIPs used on the real server. If you add an IP address to this directive (and uncomment it), you limit the Apache daemon so that it can only receive requests on a particular IP address. (On Apache 2.0 and newer, use the Listen directive instead of the BindAddress directive, as described later in this section.)

Note 

Leave the BindAddress line commented out, or use it as is (without an IP address).