Overview of Firewalls, Antivirus, and IDS/IPS

How Firewalls, Antivirus, and IDS/IPS Protect You

In this explanation, we provide an overview of firewalls, antivirus, and IDS/IPS as key security tools used by cyber security analysts. These tools help protect computers and networks from threats like hackers, viruses, and malware.

Firewalls act as gatekeepers between a computer or network and the internet. They monitor incoming and outgoing traffic and decide what to allow or block based on a set of rules. For example, a firewall can block harmful websites or prevent unauthorised access to your computer.

There are two main types of firewalls:

1. Network Firewalls: Protect an entire network by filtering data entering or leaving the network.
2. Host-based Firewalls: Protect a single computer by controlling the traffic to and from that device.

Firewalls help stop attackers from reaching your system but cannot detect viruses or malware hidden inside files.

Antivirus software finds and removes malicious programs, like viruses, worms, and trojans, from your computer. It constantly scans files, emails, and downloads to detect harmful code. Once found, it either deletes or quarantines the infected file to stop it spreading.

Antivirus programs use a database of known threats to recognise viruses. They also use heuristic analysis, which looks for suspicious behaviour to find new or unknown malware. Regular updates are important to keep antivirus tools effective against new threats.

While antivirus protects against malware on devices, it does not monitor network traffic like a firewall does. This is why both tools work together for better security.

What is IDS/IPS?

IDS (Intrusion Detection System) and IPS (Intrusion Prevention System) are tools that scan network or system activity for unusual or dangerous behaviour.

• IDS: Alerts administrators when suspicious activity is detected. It does not block threats but helps identify attacks early.
• IPS: Takes action by blocking harmful traffic or attacks immediately to protect the system.

IDS/IPS use patterns and rules to spot attacks like hacking attempts or malware attempting to enter a network. This technology provides an extra layer of protection by actively watching network activity instead of just scanning files like antivirus software.

In summary, firewalls control who can connect to your network, antivirus protects individual devices from malware, and IDS/IPS monitor and defend networks from attacks. Together, these security tools form a strong defence to keep systems safe from cyber threats.