Abstract:
The need for security in the networks has become most essential due to many reasons, the most important reason is to protect data and information from hackers and keep confidential data out of reach from unauthorized access by other people.
One of the ways to implement security enforcement in network is to use “Firewall Technique”; Firewall technique is the process of separating protected network from unprotected network through central checkpoint with aid of software and hardware.
To maintain firewall, the network topology, cabling, system, devices, and OSI layers should be determined first. In addition to the above requirements it is important to select the protocol (TCP/IP), routing, and Client/Server interaction.
The firewall strategy is strongly based on security policy that has been selected and implemented by the firewall.
Firewalls has helped in improvement of security and reducing server risks and blocking the services that could attack by hackers, and provide us developing control access to network sites.
For importance of the firewalls this project discusses the principles of firewall, and the firewall types. A simple firewall has been designed to run under the Linux operating system; which consider as open source, inexpensive, and more
