Not many know that having a firewall on your Android is crucial. A firewall is like a safety barrier between your smartphone or tablet and the internet. This firewall filters all the connections and it allows only the authorized ones to go in and out. Of course, we can’t compare an android firewall with a PC firewall, which is more advanced.
Why should you install a firewall?
There are many reasons why you will want to install a firewall on your Android. Starting from stopping an application from automatically updating, blocking offline advertises that come along with some applications, avoiding online checking for your application and of course saving your data MB from unwanted internet connections that might run on the background.
Installing a firewall
Since not many users have their Androids rooted, we will suggest you two applications: one is for rooted devices and one for devices without root access.
- DroidWall (root access required)
This application works on any Android device with root access. The application is not complicated and it comes with a page with all the applications you have installed on your device. Next to each application’s name, you will notice two checkboxes that are for “block” and “unblock”, so the application is stopped from connecting to the internet by using your Wi-Fi or mobile connections. Along with it, there are also two modes, which are sorted in a “black list” and “white list”. The “white list” will allow the applications that are inside it to connect to the internet, while blocking all the other applications and the “black list” will stop only specific applications from connection to the internet. Just tap on the “mode” textfield to change the way you want to use the firewall and to start or to stop the firewall service, you will have to open the menu where you will see a button that can enable and disable your firewall.
- NoRoot Firewall (no root access required)
Keep in mind that this application might not work for any device, but you can give it a try. By using your Android VPN, you can “simulate” a firewall even if you don’t have root access. However, the connection will have to go through the application, which is checked, approved and then regenerated from the application. With other words, this will double the MB consumption. Apart from this, the application works very well and you will have two simple buttons that will “allow” or “deny” any of the installed applications on your Android device. You can even create some custom filters that will allow you to manage individual IP/hostname and port by tapping on an application’s name.