Apache: Unable to connect

I have OpenSUSE 12.1 installed and am trying to install LAMP using the procedure outlined here. Everything appears to be working until I enter

http://192.168.0.100

in the browser. This causes the following.

Unable to connect

      Firefox can't establish a connection to the server at 192.168.0.100.

The site could be temporarily unavailable or too busy. Try again in a few
moments.
If you are unable to load any pages, check your computer’s network
connection.
If your computer or network is protected by a firewall or proxy, make sure
that Firefox is permitted to access the Web.

Any assistance with resolving this issue would be most appreciated.

Peter.

It’s very simple in openSUSE:

Intall the LAMP pattern
Install phpMyAdmin
Use Yast - Network services - HTTP server to setup apache, the defaults should already bring a working situation, i.e. http://127.0.0.1 should show Apache’s example index.html, showing " It works!! "
Next, use Yast - System - Runlevel editor to make mysql start at boot.
Use mysqladm to create a password for the root user.
Use phpMyAdmin to create database(s), database users etc.

Thank you for your reply. It seems to work, as howtoforge.com said it should work, if I use http://127.0.0.1 , as you suggested, instead of http://192.168.0.100 as howtoforge.com suggested.

normally http://localhost should also work