Allowing connections
By default, the apache http server uses TCP and UDP port 80 for http and TCP and UDP port 443 for https secure transfer. Verify that the firewall allows connection to these ports

Configuring the server
The main configuration file use by the web server is located at /ect/httpd/conf/httpd.conf

Virtual Host Sections
To serve more than one website you would need to configure virtual hosts. There are two types of virtual hosts: name-base and ip-base
#Enable name-based virtual hosting
NameVirtualHost *.80

ServerName www.example.org
DocumentRoot /var/www/example.org
#add other directives here


Loading Modules
LoadModule module_name modules/module_filename.so

Logging Connections
By default log messeages from HTTP server are written to /var/log/httpd

Starting and Stopping the Server
service httpd start command as root to start the apache server.
service httpd reload command to restart the service if is already running.
service httpd stop command to stop the apache server.
chkconfig http on to configure the web service to start automatically at boot time.