[Zope] Zope Port Question - Running on Port 80

[Marc Stein]

I'm trying to move my Zope instance from port 9673 to port 80 and have some
fairly basic questions regarding the port configuration.  In my z2.py file
the parameter HTTP_PORT is set to 8080.  This is the only z2.py file on the
machine.  In /etc/zopectl/zopectlrc 9673 referenced as the HTTP port.  If I
change 9673 to 80 and restart Zope I don't get an error, but I can't
resolve.  If I try to access port 80 while Zope is running on 9673 I don't
get a page resolved.  Apache is running (on port 80 according to
httpd.conf).  If I change Apache to run on another port (say 8080) then Zope
stops working.  It would seem as Zope is using Apache as a proxy, but why
not on port 80.

Is there a simple way to reconfigure this instance to use port 80 either via
Apache or the Zope HTTP server?  At present I want to access the site via IP
instead of domain name.

Many thanks in advance,

Marc Stein