Contributor(s): John Burke

A gateway is a network node that connects two networks using different protocols together. While a bridge is used to join two similar types of networks, a gateway is used to join two dissimilar networks.

The most common gateway is a router that connects a home or enterprise network to the internet. In most IP-based networks, the only traffic that doesn't go through at least one gateway is traffic flowing among nodes on the same local area network (LAN) segment -- for example, computers connected to the same switch.

Gateways can take several forms and perform a variety of tasks. These include:


Web application firewall - filters traffic to and from a web server and look at application-layer data.


API, SOA or XML gateway - manages traffic flowing into and out of a service, microservices-oriented architecture or an XML-based web service.


IoT gateway - aggregates sensor data, translates between sensor protocols, processes sensor data before sending it onward and more.


Cloud storage gateway - translates storage requests with various cloud storage service API calls.


Media gateway - converts data from the format required for one type of network to the format required for another.

Amazon API Gateway - allows a developer to connect non-AWS applications to AWS back-end resources.

VoIP trunk gateway - facilitates the use of plain old telephone service (POTS) equipment, such as landline phones and fax machines, with a voice over IP (VoIP) network.

Email security gateway - prevents the transmission of emails that break company policy or will transfer information with malicious intent.

A gateway's position in the IoT ecosystem
A gateway's position in the IoT ecosystem
This was last updated in September 2016

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I need brief information about gateways, multiprotocol routers in network devices. Can you please send me the information? Thank you.
Does your work involve network communications that don't pass through any gateways? If so, how do you know?
I don't understand the concept of gateway? Is there any practical way to locate their working?
Hi, this is great dude. Thanks for sharing.
I need more explanation of gateways. How many gateways must a network have?
If we will be able to get the device signature consisting of one of the parameter as gateway address then definitely we will be able to detect the node which is acting as malicious........ hope will help :) 


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