Difference Between A Firewall and Intrusion Detection System


As useful as it may be, the internet is a dangerous place. It came into the existence in 1983 and since then it has been growing and advancing at a surprisingly high speed. Its' growth and development has made our life easier and right now we are living in a time where we cannot even imagine our lives without it. But every coin has two sides and the internet is no different. While there’s a whole lot of information to find on it, there’s also dark when where things unimaginable are done, full of horror. While we sit and use the internet on our homes, offices or any other place, we are constantly under the threat of online thieves who in modern technology has been given the names of hackers.


These hackers are pretty clever people and always find a way to steal. By sending viruses and malware into your device and hacking your system, their tricks are plenty. It’s up to you if you want to be their next victim or want to secure your network before it’s too late. Firewalls and Intrusion Detection System is one of the most effective defenses against these hackers. But before using them you need to know how many similarities and differences they have with each other before you can understand which one suits your needs.


Differences between Firewall and IDS:

• While both of these comes in the form of both hardware and software, you can think of their roles in your network as a gatekeeper (the firewall) and patroller (the IDS).

• The firewall works as a wall and a filter between your network and the internet, keeping the harmful traffic that may be carrying viruses and malware out. The IDS works Internally. It searches for the presence of viruses and malware by looking into the functionality of the system. If there’s an unauthorized activity, it may be malicious. In that case, it raises an alarm.

• While Firewall has been given the authority to deny entry, send back or even destroy the corrupt data traffic it receives, IDS takes over the control if the Firewall has failed in the task and raises an alarm if the incoming traffic rises to an above-normal level.

• To filter the traffic, Firewall needs to analyze things like protocols, IP addresses, and ports. On the other hand, IDS's primary job consists of looking for a repeat of the pattern of attack, which will help it raise an alarm before the hackers have the time to carry out the attack.

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