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Protocols Supported by Listeners
Listening Ports

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Help Center/ Global Accelerator/ User Guide/ Listeners/ Listener Overview

Listener Overview

Updated on 2025-02-27 GMT+08:00

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Each global accelerator has at least one listener for listening to requests and distributing the requests to endpoints based on the client affinity and weight you set.

Protocols Supported by Listeners

**Table 1** Protocols supported by listeners
OSI Layer	Protocol	Description	Scenarios
Layer 4	TCP	Source IP address-based sticky sessions Fast data transfer	File transfer, email sending and receiving, remote login, and other scenarios that require high reliability and high data accuracy Web applications that need to be robust and require high performance to process a large number of concurrent requests
Layer 4	UDP	Relatively low reliability Fast data transfer	Video chats, gaming, real-time financial quotations, and other scenarios that require quick response

Listening Ports

**Table 2** Listening ports
Protocol	Port Range	Description
TCP	1–65535	Port 22 is used by the system and is not recommended. Multiple ports or port ranges are separated by commas (,).
UDP	1–65535	Port 4789 is used by the system and is not recommended. Multiple ports or port ranges are separated by commas (,).

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