Unless I'm mistaken, the IP address you mentioned is the NAT network's gateway address!? Assuming the VM's IP address is 192.168.54.128 and the web server uses port 80, you may add:
[incomingtcp]
8080 = 192.168.54.128:80
to the file to access the web page from the network using the host's IP address and port 8080.
André