netstat -an | grep -v unix | grep ":80 "
If iFolder is installed in Standalone mode, then you see that the iFolder instance runs on 0.0.0.0:80, the default Apache2 instance should be terminated. If iFolder is installed in Coexistent mode, then the iFolder worker thread runs on specific_address:80 and Apache will be on other_addresses:80.
/etc/init.d/novell-ifolder restart