[ubuntu] KVM & networking question

I am pretty new to Ubuntu, hope someone can point me in the right direction:

- I have ubuntu 14.04.2 LTS installed on a machine on my home network, this is the host
- I am running KVM
- I have a VM also running Ubuntu 14.04.2 for Apache2, this is the guest
- I want to host a website in this Web Server that is available from other machines on my home network

I think I need to use a bridged network interface on my host.

I went thru the setting up a bridge network section in: https://help.ubuntu.com/community/KVM/Networking

I can see the web page in a browser in the guest and the host, but not from a separate machine on my home network. Right now I am not using DNS, I just enter the ip address of the guest into the address on the browser.

I can't ping the guest from the other machine.

Any ideas what I am missing? I am not sure where to start looking for the problem.

thanks, in advance, for any help!

- Derrick