Bug ID 594782: Active FTP data transfer via FTP AppTunnel is interrupted after 5 minutes.

Last Modified: Jun 10, 2021

Bug Tracker

Affected Product:  See more info
BIG-IP APM(all modules)

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1

Opened: May 20, 2016
Severity: 3-Major

Symptoms

The connection is getting closed by the server. RST is being sent to the client from virtual server after 5 minutes of the download starting while data is flowing.

Impact

This affects FTP transfer of large-sized files that take more than 5 minutes (the default idle timeout in TCP profile on the BIG-IP system) to download.

Conditions

If the settings for the TCP profile are default on BIG-IP then this issue will be encountered for FTP transfer of files that take longer than 5 minutes to download. In a general case, if the idle timeout in the TCP profile is less than the keep-alive interval, and if FTP transfer takes more time than the specified TCP timeout, transfer gets interrupted.

Workaround

Set the timeout to Indefinite or set the keep-alive interval to a value that is larger than idle timeout in the TCP profile. Then download does not get interrupted and completes as expected.

Fix Information

None

Behavior Change