Securing Home Network with Basic Firewall Rules

Introduction

The Internet of Things (IoT) began as a concept of the future of connected technology and is now a reality. The average home has multiple connected devices, but many devices don’t have the necessary security to keep the consumer’s data safe. A poorly secured device can act as a backdoor for attackers. For example, if hackers can access the network through the smart TV, they can easily infect a laptop on the same network with malware or access files. With the increasing number of network threats, it's also our responsibility to adapt security measures to keep our devices and data secure. We also have our security guard, the ‘Firewall’, which acts as the first line of defence in protecting our network.

A network consists of two or more computers that are linked to share resources, exchange files, or allow electronic communications. The computers on a network may be connected through cables and telephone lines (wired connections) or radio waves, satellites, or infrared light beams (wireless connections). Some of the possible vulnerabilities these networks face are firewall misconfiguration, unsecured network access points, weak passwords and authentication protocols. As newer technologies are emerging we need to keep up with the security measures that can ensure privacy and security to our devices. 

The firewall, which is the initial line of protection, works by examining data packets that try to enter or leave a network. They assess a multitude of characteristics, such as protocols, port numbers, and source and destination IP addresses. The firewall either allows or prohibits the traffic based on the rules that the network administrator has defined. Malicious attacks and illegal access are reduced because of this procedure. Thus it protects unauthorised access and enhances security. It can also filter out malicious content, helping to prevent malware infections and data breaches. As technology continues to evolve, firewalls will remain a key component in safeguarding networks from emerging threats. 

Additional Steps to ensure privacy and securing your network space.

1. Turn your network off when not at home

One of the easiest ways to protect your home network is to turn it off when you're not at home. Turning your Wi-Fi off while you're away reduces the chances of hackers attempting to break into your home network when you're not at home.

As well as reducing security risks, unplugging the router when you’re not there also prevents it from being damaged by power surges. It is also important to keep your devices connected to the  network healthy using software updates regularly and promoting comprehensive anti-virus software(eg: Kaspersky Premium).

 2. Use a strong password for your router

Wireless routers typically come pre-set with default passwords. Hackers can guess these, especially if they know the routers manufacturer. Therefore, changing the router password is essential. The stronger the password is, the more time it takes to crack the password. A good password must be a combination of capital and small letters, digits and special characters. Also changing passwords regularly(every six months or so) can ensure even more security. You can change the password by connecting to the router’s management interface through your browser, the address should be the router’s default IP address found on its bottom sticker or in the set-up guide.

3. Change the name of your default home network

By changing the name of the default home network we can reduce or avoid attacks from hackers. Your network’s name is known as an SSID, this stands for Service Set Identifier. Routers broadcast SSIDs so nearby devices can find any available networks. If you open the list of Wi-Fi networks, you will see a list of nearby SSIDs. Typically, manufacturers create default SSIDs by combining a company name with random numbers and letters. It’s a good idea to change your SSID name because: If criminals know the manufacturer of your router, they might be aware of the model's vulnerabilities and how to exploit them. Avoid an identifier that includes any personal information, such as your name, address, or phone number. It's good to use a bland name for your SSID – one which won’t attract the attention of hackers scanning Wi-Fi networks in your area.

4. Keep your router firmware up to date

Maintaining updated software is crucial for good cybersecurity, and this includes keeping your router's firmware current. Older firmware versions can have security vulnerabilities that hackers might exploit. Many routers have management interfaces where you can check for available firmware updates, and some even offer automatic update features. Additionally, you can visit the manufacturer’s support website to find updates for your specific router model.

5. Set up a separate network for IoT devices

The Internet of Things (IoT) raises cybersecurity concerns:

• More connected devices mean more potential entry points for hackers.
• Not all IoT devices are secure.

To enhance router security and protect against attacks, consider setting up a separate Wi-Fi network for your IoT devices, a VLAN (Virtual Local Area Network). This isolates your sensitive devices, like computers and phones, from less secure IoT devices, reducing the risk of hackers gaining access through vulnerable IoT devices. Using a VLAN doesn't restrict functionality since most IoT devices are controlled via smartphone apps and don’t need direct communication with other devices on the local network after initial setup.

It's more important than ever to protect your home network in the connected world of today. Taking preventive measures to strengthen your network can make a big difference, especially with the growth of IoT devices and the increasing wave of cyber threats. You're not just erecting barriers; you're building a fortress by putting simple firewall rules into place, employing strong passwords, changing your network name, updating firmware, and separating IoT devices. Recall that the security of your network is only as strong as its weakest link, so maintain alertness, stay current, and shield your online activities from intruders. The best weapon against the ever-evolving hazards of the digital era is, after all, a secure home network.

 Contributed by:- Raihan Rasheed and Jobin A J