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How to check IP?

If you ask this question, the Fing application will give you answer. Fing is a program that changes every smartphone with Android into a tool for scanning and diagnostics of wireless networks. For a person who has nothing to do with setting WiFi parameters and a clueless idea on issues such as IP address, this program is unlikely to be needed, but when we want to be able to easily monitor what devices are currently using our home wireless network, ” Fing “can be a useful tool.

Diagnosis of a wireless network using a smartphone is the most possible. A handy device capable of network communication in combination with the right application is a tandem that can not only facilitate the work of the network administrator. Also people who have a Wi-Fi network in their homes can use a phone with the Fing application installed to check, for example, what device are currently connected to the network, or what listening network services are running on computers, smartphones or tablets using home Wi-Fi . It is a good solution because it allows you to easily “track” a potentially dangerous service, or a person who, for example, misuses the network.

Fing allows you to quickly check what devices are using our home network (or any other network to which we are currently connected). Thanks to simple operation, verification of who is currently using Wi-Fi is easy and does not require logging in, eg to the admin panel of the wireless router. An additional feature is the ability to check what services (and more precisely what service ports) are open by any host in the network for which we know the IP address or domain address. Even more interesting is the ability to block access to a given network for selected devices, but in this case the application itself is no longer enough, you need the right equipment proposed by the developers of the program.

Fing – diagnostics, Wi-Fi scanning and hardware search

Fing immediately starts searching for devices using the same wireless network.

If we do not want to send out the MAC addresses of our devices working in the home network, we do not have to agree to this service, and so Fing will be able to deal with the recognition of at least the device manufacturer, although he can not always correctly determine whether the product connected to the network is a stationary or mobile device. However, we can make the recognition of devices easier. Usually, we know what is connected to the home network. And when the application detects our equipment, it is enough to indicate a specific item on the list. This will invoke a screen with detailed network parameters and editable fields, in which we can enter our own name (eg “Phone daughter” or “TV in the living room”). Thanks to such a solution, it will be easier for us to recognize a potential intruder in the future.

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Fing and blocking devices

In addition to naming our devices, we can also assign icons to them, which will unambiguously identify whether the equipment is, for example, a tablet, a smartwatch or an e-book reader. An interesting promising function of “Fing” is the ability to block devices from accessing our network. After displaying the screen with the network parameters of the selected equipment, one of the options – marked in red – is the “Block device” icon. Unfortunately, we will not block anyone from the application itself. After indicating this icon we will see only a message saying that this function requires additional equipment. What? Just indicate the words “Get in on Indiegogo”.

After indicating the inscription, a mobile browser is launched, in which we are redirected to the Indiegogo site – a crowdfunding site – where we are offered equipment called Fingbox. It’s a kind of Wi-Fi router – the device is necessary to block access to the wireless network using the “Fing” application. Since, for now, the product functions as a preliminary project (funds are collected), the blocking function at this stage can only be treated as a curiosity.

A much more interesting thing in the Fing application is the ability to check what services work on any server in the network. In the picture above, we show this on the example of scanning the server located at www.google.com. As you can see, after entering the domain name and running the scan, the program detects the IP address of the Google host and also shows which ports are open on it, which also means what types of services are available on it. In the case of a search engine, we did not expect anything other than access via HTTP (port 80) and HTTPS (port 443). The program also gives us the opportunity to check if the selected host responds (“Ping” command). We can also check the route of packets from our smartphone to the target server (“Trace route” command). In addition, Fing allows you to send a special wake-up packet to the selected device, but this solution is more applicable to local networks.

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To sum up, “Fing” is an easy-to-use and useful tool, with the help of which we can quickly check what devices are connected to our network, what are their MAC addresses and IP addresses. There are also useful functions to determine whether the lack of access to some favorite website results from configuration errors on our side, or is it simply an external issue that we have no influence on. Blocking access to WiFi is for now only a curiosity that has no practical justification, because it requires the purchase of equipment that is not yet widely available and for now only funds are being collected for it. However, even ignoring this impractical – so far the function – Fing is worth at least trying.

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