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What is a Firewall?

A Firewall acts as a barrier between your network of computers and the outside world. It only allows the traffic you want to enter and leave the network.  

Firewalls can be a piece of hardware or software, but the best strategy for security involves the use of both.

Where did the term "Firewall" come from?

The term was borrowed from firefighters and their use of setting up fire barriers to keep fires from spreading.

Why are Firewalls important?

  • As networks continue to grow and become increasingly dependent on mobile accessibility, firewalls are needed to ensure only the right traffic can have access. 
  • Helps prevent a hacker from logging onto a computer in the network.
  • If a hacker had the ability to access one computer on the network, they could possibly access every computer connected on that network. 

Common Features of a Firewall: (source here)

  • Blocking unwanted incoming traffic is the most common feature of a firewall.
  • Block outgoing network traffic based on source or destination. For example, you may want to prevent employees from accessing inappropriate Web sites.
  • Make internal resources available. Although the primary purpose of a firewall is to prevent unwanted network traffic from passing through it, you can also configure many firewalls to allow selective access to internal resources, such as a public Web server, while still preventing other access from the Internet to your internal network.
  • Allow connections to internal network. A common method for employees to connect to a network is using virtual private networks. VPNs allow secure connections from the Internet to a corporate network. 

Security is the key to keeping your data safe! Firewalls, (in conjunction with anti-virus, anti-malware, proactive monitoring, etc.) add another layer of security in modern networks. Contact us with questions regarding the latest in security products and solutions.