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What are firewalls and how can they help your business?

Firewalls protect your network from intruders by monitoring incoming and outgoing traffic. They inspect each packet of data travelling over the network and decide (based on rules) whether to forward or drop the packet.

Computers have ports that are basically communication channels. When a program connects to an open port, it can transmit data through it. A firewall can block open ports and make it more difficult for a hacker to get into your computer.

FACTORS TO CONSIDER

Firewalls come in all shapes, sizes and prices. Choosing the right one depends mainly on your business needs and the size of your network.

Hardware or software?
There are two types of firewall. We prefer a hardware firewall as these are physical devices that connect to your network and are always present. Software firewalls, on the other hand, simply run on your computer and may not load at boot-up, leaving your computer exposed. They are, however, very good for monitoring programs that access the Internet. The most effective solution would be a combination of both.

Application access
When a firewall is installed, any applications that need access to the Internet should be given permission to do so. This includes virus software, e-mail programs, web servers and browsers.

Content filtering
A firewall with content filtering enables the administrator to block certain websites containing inappropriate content, such as pornography or racist material. You can choose the type of access allowed, and whether all or some employees will have access.

Demilitarised Zones (DMZs)
You need a DMZ if your customer or business partners need access to your data. A DMZ is a protected information area on your network. Outsiders can get to the protected area, but not to the rest of the network. Many firewalls can do this.