nel file di configurazione di apache (httpd.conf) devi settare la riga:
codice:
#
# Port: The port to which the standalone server listens.  Certain firewall
# products must be configured before Apache can listen to a specific port.
# Other running httpd servers will also interfere with this port.  Disable
# all firewall, security, and other services if you encounter problems.
# To help diagnose problems use the Windows NT command NETSTAT -a
#
Port 80