they block 80 so u dont house off your computer.
you can do a port scan of 127.0.0.1
scan every port
http://www.petri.co.il/quickly_find_...open_ports.htm
turn firewall off cause it might block some ports also
try this in terminal "netstat -f inet -W"
look for ESTABLISHED connectiong on local host
that'll show you open ports
what happends