Why a NAS can be dangerous if you do not configure it well

NAS servers are one of the most popular devices in recent years, and the possibility of creating our private cloud at home , without having to buy a monthly or annual subscription of different cloud services, is something that we must take into account. bill. In addition, another very important aspect is that a NAS can be in charge of controlling all the home automation in our house, making use of the popular Home Assistant. However, something that you should keep in mind is that if you do not configure your server correctly, it can be very dangerous for your local home network. Today we are going to show you the reasons why this is so.

Risks if you configure it wrong

The main risks that affect a server if you do not configure it properly is that any cybercriminal could take full control of your computer, and not only will they have access to all the data on the NAS server, but the computers could also be affected. . On many occasions in recent years, the main manufacturers have suffered from problems related to ransomware infections, a very effective type of attack that encrypts or encrypts all the files and folders that we have on the NAS storage, for this reason it is very important protect this type of device as much as possible.

Next, we are going to indicate all the risks you have if you configure it incorrectly:

  • Non-legitimate access to the server as an administrator , so that a cybercriminal, taking advantage of a security flaw, could have total control of the computer.
  • If a cybercriminal becomes an administrator, they could make any kind of change to internal storage . It will be able to modify, delete, copy all the files and folders to a remote location to blackmail you and much more. Of course, you could encrypt all the information and then ask for a ransom.
  • They could attack other computers on the local network if they take control of the server. The cybercriminal could access the computers on the home or professional local network where the NAS is located, in this way, they could try to exploit other computers and take control of them, for example, infecting them with ransomware and demanding a ransom.

For these reasons, it is essential to protect your computer, not only to keep all the files inside it safe, but also to protect the rest of the computers on the local network.

Basic security measures to take

There are several basic security measures you should take, if you haven’t done so before. Thanks to the configurations that we are going to recommend below, you will be able to protect your computer with a fairly acceptable level, with the aim of avoiding the vast majority of attacks.

  • Deactivate the UPnP protocol , both in the router and also in the server, so that it does not open ports to the outside autonomously, but rather we are the ones who have to open ports.
  • If you need to access the NAS remotely over the Internet, please enable the VPN server for the highest security. In the router you will only have to open one port to the computer, and you should not open any other ports.
  • If your operating system has a firewall , enable it to prevent illegitimate connections. There are some firewalls that allow only access with a Spanish IP or from a country in question, blocking the rest of the countries.
  • Setting up a good password for the admin user you created, setting up two-step authentication is also highly recommended.
  • Disable the “admin” user to avoid security problems.
  • Only use the necessary services, if the SSH server is not going to be used, then better keep it off.
  • Never access the web management menu of the NAS over the Internet by exposing its port , if you need to do so, first connect via VPN and then web management.

With these basic tips, you will be avoiding many risks, and you will not only avoid problems with your server, but also with the computers and different devices of our local home network.


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