A Primer on Firewalls


Firewalls pic
Image: cisco.com

A strategy executive with experience in finance and telecommunications, Michael Marlowe serves as the director of strategy and vice president of new markets with ChaseTek in Columbus, OH. In his leadership role with the Columbus, OH-based firm, Michael Marlowe serves as a point of contact for services such as VoIP, landline, and firewall management.

In today’s tech-centered world, nearly all telecommunications companies offer some kind of firewall management service. At the most basic level, a firewall refers to a method of filtering incoming and outgoing Internet traffic with the purpose of ensuring network security. The ideal firewall should allow all legitimate traffic through while preventing unwanted traffic that may be harmful to the user’s system.

Firewalls achieve network security in a number of ways. Simple firewalls examine information for characteristics such as its source and location, which can give clues regarding its legitimacy. While these types of firewalls are great at preventing unwanted data from coming in, they do little to prevent unwanted outgoing data from “Trojan horse” viruses. To prevent these malicious programs from transmitting user data, complex software firewalls can be used alongside a hardware firewall.