Firewalls and DMZ Assignment Example | Topics and Well Written Essays - 1000 words

Firewalls and DMZ - Assignment Example Benefits and Limitations of Firewalls There are several advantages of implementing firewalls at the personal level. A firewall based personal security system comprises hardware and/or software that stop an illegal attempts to use data, information, and storage media on a network (Shelly, Cashman, & Vermaat, 2005, p. 574). In addition, a personal firewall is a utility program that perceives and secures a personal computer and its information from illegal access. Personal firewalls continuously check all the inside and outside communications to the computer and notify of any effort of illegal access. Also, Microsoft's operating systems, for instance, Windows XP, incorporate a personal firewall (Shelly, Cashman, Vermaat, Cashman, & Vermaat, 2004, p. 574). Obviously, a firewall itself must be protected and attack proof, if not its capacity to protect links can be diminished. The implementation of firewalls provides several advantages to the organizations. In an organization, a firewall i s a computer or router that is located between the trusted and un-trusted computers (Silberschatz, Galvin, & Gagne, 2004, p. 692). It confines the network use between the two security domains, and checks and logs all links. Also, it can confine links based on starting place and target location, source or targeted port, or way of the link. For example, web servers utilize ‘http’ to carry out communication with web browsers. A firewall as a result may permit only http get ahead of, from all hosts external to the firewall simply to the web server inside the firewall (Silberschatz, Gagne, & Galvin, 2004, p. 672). Although, the use of firewalls provides help against security threats, but it is not helpful in all the situations. For instance, a firewall is not useful for the threats that are channeling based or go inside protocols or links that the firewall permits (Ioannidis, Keromytis, Bellovin, & Smith, 2000). Additionally, in case of the firewall installation on a persona l computer the speed of processing goes really down that makes the overall processing more problematic and performance slows down because the content of the data and information traffic is checked and confirmed by the firewall. Also, the longer response time in case of web based working and data retrieval. Sometime firewalls are not able to protect computer from internal sabotage inside a network or from permitting other users to right of entry to your PC. Moreover ,Firewalls sometimes present weak protection against viruses' consequently, antiviral software as well as an intrusion detection system or IDS that defends beside port scans and Trojans should as well complement our firewall in the layering protection (Wack, Cutler, & Pole, 2002; Thames, Abler, & Keeling, 2008). The utilization of firewalls in the organizations is not useful in all the situations. For instance, in an organization's business data buffer-overflow threat or attack to a web server cannot be dealt by the firew all for the reason that the http link is permitted; it is basically the contents of the http link that address the attack (Silberschatz, Galvin, & Gagne, 2004, p. 673). Also, denial of service attacks in an organizational structure are