Network security is one of the most important things in computer network management, it is because there is always a risk of damage and theft of data on the network due to virus infection computer or actions of irresponsible hackers. Fungsi excel
key facts about firewall
1. Within the scope of the talks computing; Firewall is a network security system that is used to control and monitor data traffic and out into a network based on a specific security settings. This security system will work as a wall separating the internal network environment that is considered a safe and trusted environment outside networks. The Internet is a network outside the network environment is assumed to be unsafe and unreliable.
- Network firewall is software that runs on ordinary hardware or hardware that is made specifically for conducting the firewall functionality; This device is in charge of the traffic filtering data packets moving between two or more networks.
- While a personal firewall or host-based firewall is a security system that works on a computer and serves to perform filtering data packet traffic to enter and exit the computer. The security system is sometimes placed on the router device to perform the function of the same security by filtering data packets in and out.
How it works Firewall
1. System firewall works by analyzing data packets in and out in a secure environment protected by the firewall system. Data packets that do not pass the analysis will be denied entry or exit or a protected computer network.
1. protect the network or computer where the firewall system installed on the entrance and exit of unwanted data packets or compromise security. Firewall will perform inspections or filtering data packets based on policies created by the administrator.
2. There are several parts to be examined and taken into consideration whether or not a packet passes data such as the IP address of the data packets coming, source port of origin of the data packets, the IP address of the destination of data packets, the port is the purpose package virgin, IP protocols and information obtained from a data packet header.
3. Based on what was done and how the firewall works it can be concluded that the main function of this system is the control and regulation of the litas data packets outgoing or incoming network protected by a firewall system.