Understanding HTTP Trickling

HTTP trickling is a mechanism used to prevent the HTTP client or server from timing-out during a file transfer or during antivirus scanning. On some slow link transferring, a large file could timeout if too much time is taken for the antivirus scanner to scan a complex file.

HTTP trickling is the forwarding of specified amounts of unscanned HTTP traffic to the requesting HTTP client to prevent the browser window from timing out while the scan manager examines downloaded HTTP files. (The security device forwards small amounts of data in advance of transferring an entire scanned file.)

HTTP Trickling is time-based and there is only one parameter, the time-out interval, to configure for this feature. By default, trickling is disabled.

Note: The timeout based trickling is packet driven. This means, if no packet is received within a certain time frame, HTTP trickling is discontinued. This setting is only supported for HTTP connections.

Related Topics

Junos OS Feature Support Reference for SRX Series and J Series Devices