Firewall Explain in Detail
A firewall is a hardware or software appliance that sits between a computer and the Internet. The firewall protects the computer by blocking unauthorized access to the computer’s network resources.
A firewall is composed of three main components: the firewalling engine, the management interface, and the firewall rulebase. The firewalling engine is responsible for analyzing incoming traffic and deciding which traffic should be allowed through the firewall and which should be blocked.
The management interface allows the firewall administrator to configure and manage the firewall. The firewall rulebase stores all the firewall rules that have been configured by the administrator.
When a computer is connected to the Internet, the firewall must decide which traffic to allow and which traffic to block. The firewall can do this by analyzing the traffic itself, by inspecting the packets that are being sent, or by using a combination of both methods.
The firewall can block traffic based on the following criteria:
Domain Name System (DNS) lookup
IP address
Port number
Protocol
The firewall can also block traffic based on the following criteria:
User name
Domain name
Source IP
Destination IP
IP address range
Port number range
Action
The action can be:
Allow
Block
Allow is the default action and means that the traffic will be allowed through the firewall.
Block means that the traffic will be blocked and will not be allowed through the firewall.
Deny means that the traffic will be blocked and will not be allowed through the firewall.
Allow Any is the default action and means that the firewall will allow any traffic that is not specifically blocked.
Time
The time can be:
Now
In Progress
Completed
Type of traffic
The type of traffic can be:
HTTP
HTTPS
SMTP
Telnet
User ID.
9 Related Question Answers Found
Firewall is a computer security measure that helps protect your computer by preventing unauthorized access to your computer, network, or data. A firewall blocks all kinds of traffic, including but not limited to, incoming and outgoing requests for resources on the computer. Firewalls are used in networks to protect computers and other devices from unauthorized access by other users or by malicious software.
Firewall is a computer security technology that is used to protect a computer network from unauthorized access. Firewall technology can be used to protect the computer network from unauthorized access by unauthorized users, to prevent the spread of computer viruses, and to protect the computer network from attacks. Firewall technology can be used to protect the computer network from unauthorized access by unauthorized users, to prevent the spread of computer viruses, and to protect the computer network from attacks.
Firewall technology is used to control the flow of information between computers. The firewall monitors traffic and allows selected traffic through. Firewall technology is used to protect networks from unauthorized access, theft of data, and other malicious activities.
Firewall is a security software that allows administrators to control access to network resources and protect computer systems from unauthorized access. Firewall software can be implemented on a local area network, a wide area network, or on an intranet. A firewall can be classified according to its function:
1.
Firewall is a software or hardware device that protects computers from unauthorized access and intrusion. Firewall protects computers by monitoring incoming and outgoing traffic and blocking unauthorized access. Firewall is used to protect computers from unauthorized access, malware, and other online threats.
A firewall is a computer security device that filters network traffic and protects computer systems from unauthorized access. By separating different networks and systems, a firewall can help to protect networks and data from being accessed by unauthorized users. The different types of firewalls include personal firewalls, network firewalls, and host-based firewalls.
When you think of a firewall, what comes to mind? Most people would likely think of a device that helps protect their computer from unauthorized access, such as a antivirus program. But firewalls can do much more than just protect your computer.
A firewall is a software or hardware appliance that protects networks from unauthorized access and intrusion. The most common use of firewalls is to protect networks from unauthorized access by external users. Firewalls are also used to protect internal networks from unauthorized access by employees.
Firewall is a technology that helps protect your computer from unauthorized access. There are many different types of firewalls, each with its own purpose. Some firewalls are used to protect your computer from other people, while others are used to protect your computer from unauthorized access.
