TECHNOLOGY NEWS

Controlling takes place in the lower layers of the OSI model and thus may be transparent to users and applications. Whereas capture data packets and check whether the detected network connection is allowed. The firewall accepts or denies trying to initiate a network communication between certain computers. In large corporate networks, often assumed a configuration in which computers can communicate only lead to a private network environment. Scanning of network services Scanning of network services is usually carried out in relation to popular Internet services: WWW, FTP and e-mail. Firewall supervises and nature of these services on the basis of certain accepted rules of protection and organizational arrangements. For example, you can specify at what time, which days of the week and through which the computer company employees can use the resources of the respective web servers and FTP sites. With regard to e-mail, you can imagine a situation in which the firewall scans all incoming and outgoing mail, and subjected them to a certain treatment, such as removal of certain types of attachments, change of address to the sender or recipient.