How to configure the D-Link DSL-2640b to allow connections from Internet to the local Apache Web Server

Port forwarding

When you set up port forwarding, you need to have three parameters correct:

• the external port, usually 80 for HTTP.
• the internal IP-address of the server, often 192.168.1.x
• the internal port for HTTP service on the internal server, again usually 80.

ISP port blocking

Note that a web-server on an ADSL line will have poor performance and may break the terms of your ISP service - for this reason your ISP might block incoming traffic. Try setting the external port to a high number (e.g. 30080) leaving the internal port at 80 then give an external browser a URL http://<external IP>:30080/

One option is to change the network adaptor of the virtual machine to bridged mode; you should then be able to access the virtual server from the other machines on the network, by providing your guest's IP address.

Edit:

For practical aspects, look at the VirtualBox documentation on Virtual networking. Your options are to use bridged networking

With bridged networking, VirtualBox uses a device driver on your host system that filters data from your physical network adapter. This driver is therefore called a "net filter" driver. This allows VirtualBox to intercept data from the physical network and inject data into it, effectively creating a new network interface in software. When a guest is using such a new software interface, it looks to the host system as though the guest were physically connected to the interface using a network cable: the host can send data to the guest through that interface and receive data from it. This means that you can set up routing or bridging between the guest and the rest of your network.

or port forwarding:

As the virtual machine is connected to a private network internal to VirtualBox and invisible to the host, network services on the guest are not accessible to the host machine or to other computers on the same network. However, like a physical router, VirtualBox can make selected services available to the world outside the guest through port forwarding. This means that VirtualBox listens to certain ports on the host and resends all packets which arrive there to the guest, on the same or a different port.

So, in case of a NAT port forwarding, you should use the following command:

VBoxManage modifyvm "VM name" --natpf1 "guesthttp,tcp,,80,,80"