Bug ID 851101: Unable to establish active FTP connection with custom FTP filter

Last Modified: Dec 11, 2019

Bug Tracker

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

Known Affected Versions:
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, 13.1.1.1, 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, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.0.1.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.4, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 15.0.0, 15.0.1, 15.1.0

Opened: Nov 19, 2019
Severity: 3-Major

Symptoms

Unable to establish active FTP connection with custom FTP filter.

Impact

-- The active FTP data channel is reset. -- Commands that require data channel in active mode fail.

Conditions

All of the following conditions are true: -- Virtual server using custom FTP filter. -- FTP filter has port (port used for data channel) set to 0 (zero). -- Virtual server has source-port set to preserve-strict. -- Using active FTP through the virtual server.

Workaround

-- Change source-port to change or preserve. -- Set port on FTP filter to be used for data channel. -- Use passive FTP.

Fix Information

None

Behavior Change