Fing Fingbox - Meet T He R Outer; Router W Ith I Ntegrated W Ifi; Guest W Ifi

BitTorrent. Unfortunately, many devices and applications have software defects that, when
exposed to the Internet, may put your network at risk of unauthorized access. We strongly
recommend that you regularly update the software of all the devices and applications you want
to expose. Fingbox Security Check helps to be aware of what gets exposed to the Internet.
If you’re not familiar with concepts like IP routing and port forwarding, you can read the following
section “Meet the router”.
Meet the router
Your home network is connected to the Internet through a special device called router  . It acts
as the default   gateway   used by all the other devices and software applications to reach
services and computers over the Internet. Your router has usually two “sides”, technically called
interfaces: an internal interface (typically labeled LAN) facing your home network and an
external interface (sometimes labeled WAN or Internet), connecting to your Internet service
provider (directly to cable, DSL, fiber or wireless or indirectly via a modem device). Your router
is the bridge between the global internet and your home.
The external interface will be assigned by your provider a Public IP address. This is the
equivalent of your home address in the global internet, used to deliver data to your devices.
Your devices on the other hand will be assigned Internal IP Addresses not visible from the
outside world. The size of your internal network (ie. how many internal devices can be
addressed) is called a Subnet. A typical subnet is 255.255.255.0 and it can include up to 254
devices. Internal IP addresses can be assigned manually or by a service called DHCP Server
which often runs on the router itself.
The router acts as a forwarder of data between your devices on the internal interface and the
global internet on the external interface via a process called NAT (Network Address
Translation).
Router with integrated WiFi
If your router also acts as the WiFi access point, the WiFi network is typically attached to the
internal interface and all the wireless devices will usually be in the same subnet as the ones
wired   to the ethernet ports of the router.
Guest WiFi
In case your router offers the (wise) option of creating a “guest” network, it’s important to note
that it is completely separate from your home network. Technically, the guest network is a
dedicated subnet, with its own dedicated “internal” router interface and network address
numbers. Typically a guest device cannot access devices on your home network (and this is a
Fingbox User’s Guide - App v6.2.1 Page 43