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,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,

Opened: May 20, 2016
Severity: 3-Major


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.


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.


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.


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


Behavior Change