The firewall acts as a protective layer between the outside world and our organization. It prevents our infrastructure from various attacks from the outside world which includes hackers, phishing emails, etc. It is the first line of defense in our network, it segregates two different networks from one another by working as an appliance to act as a primary device to prevent intrusion. Some firewalls are available in the form of servers or routers as well, majorly there are two types of firewalls mainly hardware and software.
Types of Firewall
Hardware firewalls are a physical device that filters traffic to a computer or a server, firewall is placed between the network cable and the actual router to filter out packets from the outside internet.
A software firewall is a type of application that is installed on the computer or phone and it protects the actual device on which it has been installed from the open network source.
Firewalls consist of various filter layers through which the packets are transferred from one layer to the other for inspection of the packets when being transferred from the outside world to the internet. A firewall is the best security solution for an organization and its safety.
Components of Firewall
Intrusion Detection System is another enhancement in cybersecurity that tracks down a hacker or malicious software trying to intrude inside a network so that we can identify it and remove it promptly to prevent any issues in the network or organization. We also need to identify the event logs generated by the system or our firewall to defend our network more efficiently from similar kind of attacks from the hacker in the future. An intrusion detection system is designed in such a way that it could respond to any intruder trying to attack the system and would send a log to the system administrator.
Intrusion Prevention System it works as sync with intrusion detection system within the firewall to block the intruders or the packets that are being scanned by the IDS, the intrusion prevention system check every packet which is coming down into our network one by one so that if any malicious program is trying to enter the network it should be filtered out and prevent the network from any kind of infections.
Stateful Packet inspection is a firewall feature in which all the connections passing through the firewall generates a specific identification number through which it creates a record of the data packets and inspects the same packet while the entry inside the network. This would mean if a user from the internal network asks for traffic to return from the internet as it has been requested from inside the network.
Gateway Anti-Virus is a feature of Network security appliances that provide integrated anti-virus security on the appliance to block potential threats before reaching the network. Gateway antivirus allows corporate and enterprises to check for viruses at the application layer using a web-based scanning service.
Antispyware is a type of software that is designed to detect and remove unwanted spyware programs. Spyware is a type of malware that is installed on a computer without the user’s knowledge to collect information about them.
Concluding firewall it is a device or a software feature designed to control the flow of network packets in the form of traffic inside and outside of a network. Firewalls are installed to prevent attacks against the source IP port, source IP Address or range of addresses, destination IP port, and Destination IP address or range of addresses. A firewall acts as a gateway to the passage of the network entry point to avoid the vulnerabilities in the system.