gateway definition

A gateway is a network point that acts as an entrance to another network. On the Internet, a node or stopping point can be either a gateway node or a host (end-point) node. Both the computers of Internet users and the computers that serve pages to users are host nodes. The computers that control traffic within your company's network or at your local Internet service provider (ISP) are gateway nodes.

In the network for an enterprise, a computer server acting as a gateway node is often also acting as a proxy server and a firewall server. A gateway is often associated with both a router, which knows where to direct a given packet of data that arrives at the gateway, and a switch, which furnishes the actual path in and out of the gateway for a given packet.

This was first published in December 2005

Next Steps

Learn how to choose the best email security gateway for your organization and compare top email security gateway vendors in the market.

What are the purchasing criteria for network access control products?

Looking to buy network security tools to keep your gateways secure? Before you do, gain a better understanding of the basics and learn how network security tools have evolved. Also learn the right questions to ask before you buy.

Learn the top criteria for making smart decisions when buying network security tools and products and take a look at the top secure Web gateways on the market.


Continue Reading About gateway

Dig Deeper on Network Access Control



Find more PRO+ content and other member only offers, here.



Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:


File Extensions and File Formats

Powered by: