Segurança na internet políticas e firewall

Abstract

The elaboration of security policies in the context of the Internet presupposes a deep knowledge of several mechanisms related to the functioning of computer networks and the interveners in the communication processes through them. This work addresses essential aspects of internet security, such as existing internet services, their vulnerabilities; Type of attackers to computer systems and forms of attacks; Ways and strategies to protect systems against the various forms of known attacks. This knowledge allowed, in a second phase of the work, to prepare a proposal for a security policy for the Internet of the Commercial and Investment Bank (BCI) and the construction of a firewall that, implementing such policies, guarantees the security of the system under study (case study ). To prepare the work, it was necessary to consult the bibliography (and Internet pages) related to Security of computer systems and the Internet, interviews with specialists in the area, with the administrators of the IT system and the BCI board. The Bank's current reality was taken into account in terms of the services available to its users, the need for expansion in physical terms of the computer network and the expansion in commercial terms of the services to be made available to customers via the Internet. The result of the work was the preparation of a security policy proposal for the information system of the Commercial and Investment Bank and the construction of a Firewall that, implementing such policy, proposes to protect the system from risk situations resulting from a connection to the Internet.