How do I make a web server accessable to my local area network?

StackOverflow. I'm trying to open a web server that's accessible to my local area network using Apache. I've installed Apache and copied all of the site content into the /var/www/html directory, connected to http://localhost/index.htm using Firefox and it gave me my website, however, I've tried connecting to a computer connected to the same network and it gave me a "Server Not Found". The IP address I used to connect to the server was http://10.0.0.2/index.htm. Do I have to open any sort of firewall for this? If so, how do I do so? Any information that you may need to answer the question will be supplied.

I am running Fedora 20 and using Apache 2.5 to host the server.