Is a firewall important?
What is a firewall?
A firewall is a network device that is located at the edge of the network between the internal infrastructure and the Internet. A firewall will stop malicious intruders from coming into the network through the Internet from either corrupting or stealing your data. Firewalls act as a security guard would at your front door, allowing only authorized data to come into the network. They are the first line of defense in protecting networks from the outside world.
Why have a firewall?
A firewall is a must-have in any company or organization. When a firewall is not used, at least one machine on the network will be compromised at some point in time. A firewall will help to protect sensitive data and can restrict outside systems.
What a firewall cannot do
With a typical network firewall, controlling external access to internal systems is its primary function. While it can perform other functions, such establishing VPN tunnels, etc. its role is well defined. A standard network firewall does not perform web filtering or SPAM firewalling. Typically, those roles are performed with separate, standalone appliances. Additionally, it will not act as a web server or DNS server for the network. Those roles are dedicated to servers.
Newer network firewalls can perform some additional functions that are beyond the simple network access control. These do include web filtering and SPAM firewalling. These devices are found in much smaller networks where cost drives the decision.
Why your organization needs a firewall
Every company or organization who connects to the Internet should always have a dedicated firewall device or appliance. Data is too important to lose and too critical to be careless with it.
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