Download to read offline
Firewall security in computer network
- 1. FIREWALL SECURITY IN COMPUTER NETWORK SUBMITTED BY: POORVAVYAS SUBMITTED TO : MR. SANJAY DIDDEE SIR
- 2. TO BE DISCUSSED WHAT IS FIREWALL? WHY DO YOU NEED A FIREWALL? TYPES OF FIREWALL. METHODS OF DELIEVERING FIREWALL.
- 3. What is aFirewall? A firewall is a type of cyber security tool that is used to filter traffic on a network . Firewalls can be used to separate network nodes from external traffic sources, internal traffic sources, or even specific applications. Firewalls can be software, hardware, or cloud-based, with each type of firewall having its own unique pros and cons.
- 4. Why Do YouNeed a Firewall? Protects your computer from unauthorized access Blocks unwanted content Prevents ransomware from gaining traction Creates a secure network for multi- person interaction, such as online video games Helps keep your private information such as online banking credentials or social security number safe
- 5. TYPES OF FIREWALLS Packet-filtering firewalls Circuit-level gateways Stateful inspection firewalls Application-level gateways (a.k.a. proxy firewalls) Next-gen firewalls
- 6. Packet-Filtering Firewalls As themost “basic” and oldest type of firewall architecture, packet-filtering firewalls basically create a checkpoint at a traffic router or switch. The firewall performs a simple check of the data packets coming through the router—inspecting information such as the destination and origination IP address, packet type, port number, and other surface-level information without opening up the packet to inspect its contents.
- 7. Circuit-Level Gateways Asanother simplistic firewall type that is meant to quickly and easily approve or deny traffic without consuming significant computing resources, circuit- level gateways work by verifying the transmission control protocol (TCP) handshake. This TCP handshake check is designed to make sure that the session the packet is from is legitimate.
- 8. Stateful Inspection Firewalls These firewalls combine both packet inspection technology and TCP handshake verification to create a level of protection greater than either of the previous two architectures could provide alone. However, these firewalls do put more of a strain on computing resources as well. This may slow down the transfer of legitimate packets compared to the other solutions.
- 9. Proxy Firewalls (Application-Level Gateways/CloudFirewalls) Proxy firewalls operate at the application layer to filter incoming traffic between your network and the traffic source— hence, the name “application-level gateway.” These firewalls are delivered via a cloud-based solution or another proxy device. Rather than letting traffic connect directly, the proxy firewall first establishes a connection to the source of the traffic and inspects the incoming data packet.
- 10. Next-Generation Firewalls firewallarchitectures include deep-packet inspection (checking the actual contents of the data packet), TCP handshake checks, and surface-level packet inspection. Next- generation firewalls may include other technologies as well, such as intrusion prevention systems (IPSs) that work to automatically stop attacks against your network.
- 11. METHODS OF DELIVERING FIREWALL Software firewalls Hardware firewalls Cloud firewalls
- 12. Software firewalls Softwarefirewalls include any type of firewall that is installed on a local device rather than a separate piece of hardware (or a cloud server) However, maintaining individual software firewalls on different devices can be difficult and time-consuming. Furthermore, not every device on a network may be compatible with a single software firewall, which may mean having to use several different software firewalls to cover every asset.
- 13. HARDWARE FIREWALLS Hardwarefirewalls use a physical appliance that acts in a manner similar to a traffic router to intercept data packets and traffic requests before they're connected to the network's servers. The actual capabilities of a hardware firewall may vary depending on the manufacturer—some may have a more limited capacity to handle simultaneous connections than others.
- 14. Cloud Firewalls Whenevera cloud solution is used to deliver a firewall, it can be called a cloud firewall, or firewall-as-a-service (FaaS). Cloud firewalls are considered synonymous with proxy firewalls by many, since a cloud server is often used in a proxy firewall setup (though the proxy doesn't necessarily have to be on the cloud, it frequently is).
- 15. WHICH FIREWALL ISRIGHT FOR MY COMPANY The simple packet filtering or circuit-level gateway, which provides basic protection that has minimal performance impact. The stateful inspection architecture that combines the capabilities of both of the previous two options, but has a larger performance impact. A proxy or next-gen firewall that offers far more robust protection in exchange for additional expenses and an even higher performance impact.
- 16.